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diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter10_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter10_1.ipynb new file mode 100644 index 00000000..c0b0e702 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter10_1.ipynb @@ -0,0 +1,1297 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:4bf16723750572755d7939b2e42621cb1f52fcda512b32f42476447ce96a6e93" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 10 : SINGLE STAGE TRANSISTOR AMPLIFIERS\n" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.2 : page number 243-244\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "#Variable declaration\n", + "f_min=2.0; #Minimum frequency of operation of amplifier, kHz\n", + "f_max=10.0; #Maximum frequency of operation of amplifier, kHz\n", + "RE=560.0; #Emitter resistor, \u2126\n", + "\n", + "#Calculations\n", + "#X_CE(Emitter capacitor's capacitive reactance)\n", + "#X_CE=1/(2*pi*f_min*CE)=RE/10\n", + "#From the above equation.\n", + "CE=1/(2*pi*f_min*1000*(RE/10)); #Emitter capacitor, F,\n", + "\n", + "CE=CE*10**6; #Emitter capacitor, \ud835\udf07F\n", + "\n", + "\n", + "#Results\n", + "print('The value of the emitter capacitor = %.2f \ud835\udf07F'%(CE));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The value of the emitter capacitor = 1.42 \ud835\udf07F\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.5: Page number 252-253\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage in V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "R1=10.0; #Resistor R1, k\u2126\n", + "R2=5.0; #Resistor R2, k\u2126\n", + "RC=1.0; #Collector resistor, k\u2126\n", + "RE=2.0; #Emitter resistor, k\u2126\n", + "RL=1.0; #Load resistor, k\u2126\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#For d.c load line, from the equation: VCE=VCC-IC*(RC+RE),\n", + "#VCE is maximum when IC=0 and IC is maximum when VCE=0.\n", + "VCE_max=VCC; #Maximum collector-emitter voltage, V\n", + "IC_max=VCC/(RC+RE); #Maximum collector current, mA\n", + "\n", + "\n", + "#plot\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,20])\n", + "limit.set_ylim([0,6])\n", + "VCE_plot=[i for i in range(0,(int)(VCC+1))]; #Plot variable for V_CE\n", + "IC_plot=[((VCC-i)/(RC+RE)) for i in (VCE_plot[:])]; #Plot variable for I_C\n", + "\n", + "p=plot(VCE_plot,IC_plot);\n", + "xlabel(\"VCE(V)\");\n", + "ylabel(\"IC(mA)\");\n", + "title(\"d.c load line\");\n", + "show(p);\n", + "\n", + "\n", + "#(ii)\n", + "#For operating point:\n", + "#Assuming VCC drops almost completely across R1 and R2,\n", + "V2=VCC*R2/(R1+R2); #Voltage across resistor R2, V\n", + "IE=(V2-VBE)/RE; #Emitter current, mA\n", + "IC=IE; #Collector current, mA\n", + "VCE=VCC-IC*(RC+RE); #Collector-emitter voltage , V\n", + "\n", + "print(\"The operating point: VCE=%.2fV and IC=%.2fmA.\"%(VCE,IC));\n", + "\n", + "\n", + "#(iii)\n", + "#For a.c load line\n", + "RAC=(RC*RL)/(RC+RL); #a.c load, k\u2126\n", + "VCE_ac_max=VCE+IC*RAC; #Maximum collector-emitter voltage, V\n", + "IC_ac_max=IC+VCE/RAC; #Maximum collector current, mA\n", + "print(\"Maximum v_CE=%.2fV and maximum i_C=%.2fmA\"%(VCE_ac_max,IC_ac_max));\n", + "\n", + "#plot\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,10])\n", + "limit.set_ylim([0,20])\n", + "vCE_plot=[0,VCE_ac_max]; #Plot variable for V_CE\n", + "iC_plot=[IC_ac_max,0]; #Plot variable for I_C\n", + "\n", + "p=plot(vCE_plot,iC_plot);\n", + "xlabel(\"vCE(V)\");\n", + "ylabel(\"iC(mA)\");\n", + "title(\"a.c load line\");\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7fc7c93536d0>" + ] + }, + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The operating point: VCE=8.55V and IC=2.15mA.\n", + "Maximum v_CE=9.62V and maximum i_C=19.25mA\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7fc7c8684290>" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.6: Page number 253-254\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "RC=10; #Collector resistor, k\u2126\n", + "RL=30; #Load resistor, k\u2126\n", + "VCC=20; #Collector supply voltage, V\n", + "IC=1; #Collector current, mA\n", + "VCE=10; #Collector-emitter voltage, V\n", + "\n", + "\n", + "#Calculations\n", + "#For d.c load line:\n", + "#From the equation: VCE=VCC-IC*(RC+RE),\n", + "#When VCE=0, IC is maximum.\n", + "#Emitter resistor is neglected, assuming it as negligible\n", + "IC_max=VCC/RC; #Maximum collector current, mA\n", + "\n", + "#And, when IC=0, VCE is maximum\n", + "VCE_max=VCC; #Maximum collector-emitter voltage, V\n", + "\n", + "#plot\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,20])\n", + "limit.set_ylim([0,5])\n", + "VCE_plot=[0,VCE_max]; #Plot variable for V_CE\n", + "IC_plot=[IC_max,0]; #Plot variable for I_C\n", + "\n", + "p=plot(VCE_plot,IC_plot);\n", + "xlabel(\"VCE(V)\");\n", + "ylabel(\"IC(mA)\");\n", + "title(\"d.c load line\");\n", + "show(p);\n", + "\n", + "#For a.c load line:\n", + "RAC=(RC*RL)/(RC+RL); #a.c Load resistor, k\u2126\n", + "\n", + "VCE_ac_max=VCE+IC*RAC; #Maximum collector-emitter voltage, V\n", + "IC_ac_max=IC+ VCE/RAC; #Maximum collector current, mA\n", + "\n", + "#plot\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,25])\n", + "limit.set_ylim([0,5])\n", + "vCE_plot=[0,VCE_ac_max]; #Plot variable for V_CE\n", + "iC_plot=[IC_ac_max,0]; #Plot variable for I_C\n", + "\n", + "p=plot(vCE_plot,iC_plot);\n", + "xlabel(\"vCE(V)\");\n", + "ylabel(\"iC(mA)\");\n", + "title(\"a.c load line\");\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7fc7c8a07890>" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.7 : Page number 254-255" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variabe declaration\n", + "VCE_Q=8.0; #Q-point collector emitter voltage, V\n", + "IC_Q=1; #Q-point collector current, mA\n", + "ic_positive_peak=1.5; #Collector current at positive peak of signal, mA\n", + "ic_negative_peak=0.5; #Collector current at negative peak of signal, mA\n", + "vce_positive_peak=7; #Collector emitter voltage at positive peak of signal, V\n", + "vce_negative_peak=9; #Collector emitter voltage at negative peak of signal, V\n", + "\n", + "#Plot\n", + "vce_plot=[vce_positive_peak,vce_negative_peak]; #Plot variable of vce\n", + "ic_plot=[ic_positive_peak,ic_negative_peak]; #Plot variable of ic\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,10])\n", + "limit.set_ylim([0,2])\n", + "p=plot(vce_plot,ic_plot);\n", + "xlabel(\"vCE(V)\");\n", + "ylabel(\"iC(mA)\");\n", + "title(\"a.c load line\");\n", + "plt.grid();\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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5zbx587RhwwYFBgZq5cqVio+Pd+03AOC3qgfMI0Zcag4cwXxtGrVkNHr0aLVp00axsbE1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\nAAAAAElFTkSuQmCC\n", + "text": [ + "<matplotlib.figure.Figure at 0x7fc7c877c550>" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.8 : Page number 256\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "RC=2.0; #Collector resistor, k\u2126\n", + "Rin=1.0; #Input resistance, k\u2126\n", + "beta=60.0; #Base current amplification factor\n", + "RL=0.5; #Load resistor, k\u2126\n", + "\n", + "\n", + "#Calculation\n", + "RAC=(RC*RL)/(RC+RL); #a.c load resistor, k\u2126\n", + "Av=beta*(RAC/Rin); #Voltage gain\n", + "\n", + "#Results\n", + "print(\"Voltage gain= %d.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain= 24.\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.9 : Page number 256\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "V_in=1.0; #Input voltage , mV\n", + "RC=10.0; #Collector resistor, k\u2126\n", + "Rin=2.5; #Input resistance, k\u2126\n", + "beta=100.0; #Base current amplification factor\n", + "RL=10.0; #Load resistor, k\u2126\n", + "\n", + "#Calculations\n", + "RAC=(RC*RL)/(RC+RL); #Effective load, k\u2126\n", + "Av=beta*(RAC/Rin); #Voltage gain\n", + "\n", + "V_out=V_in*Av; #Output voltage, V\n", + "\n", + "#Results\n", + "print(\"Output voltage= %dmV.\"%V_out);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage= 200mV.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.10 : Page number 256-257\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "change_in_IB=10.0; #Change in base current, \ud835\udf07A\n", + "change_in_IC=1.0; #Change in collector current, mA\n", + "change_in_VBE=0.02; #Change in Base-emitter voltage, V\n", + "RC=5.0; #Collector resistor, k\u2126\n", + "RL=10.0; #Emitter resistor, k\u2126\n", + "\n", + "#Calculations\n", + "#(i)\n", + "beta=(change_in_IC*1000)/change_in_IB; #Base current amplification factor\n", + "\n", + "#(ii)\n", + "Rin=(change_in_VBE/change_in_IB)*1000; #Input impedance, k\u2126\n", + "\n", + "#(iii)\n", + "RAC=round((RC*RL)/(RC+RL),1); #a.c load, k\u2126\n", + "\n", + "#(iv)\n", + "Av=beta*RAC/Rin; #Voltage gain\n", + "\n", + "#(v)\n", + "Ap=beta*Av; #Power gain\n", + "\n", + "\n", + "#Results\n", + "print(\"Beta= %d.\"%beta);\n", + "print(\"Input impedance=%d k\u2126.\"%Rin);\n", + "print(\"a.c load=%.1f k\u2126.\"%RAC);\n", + "print(\"Voltage gain= %d.\"%Av);\n", + "print(\"Power gain=%d.\"%Ap);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Beta= 100.\n", + "Input impedance=2 k\u2126.\n", + "a.c load=3.3 k\u2126.\n", + "Voltage gain= 165.\n", + "Power gain=16500.\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.11 : Page number 257\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "beta=50.0; #Base current amplification factor\n", + "RC=3.0; #Collector resistor,k\u2126\n", + "RL=6.0; #Load resistor, k\u2126\n", + "Rin=0.5; #Input impedance, k\u2126\n", + "Vin=1; #Input voltage, mV\n", + "\n", + "#Calculation\n", + "RAC=(RC*RL)/(RC+RL); #a.c load, k\u2126\n", + "Av=beta*RAC/Rin; #Voltage gain\n", + "Vout=Vin*Av; #Output voltage, V\n", + "\n", + "#Results\n", + "print(\"Output voltage=%dmV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=200mV\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.12 : Page number 257-258\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VT=6.0; #Collector potential, V\n", + "R1=1.0; #Resistor R1, k\u2126\n", + "R2=2.0; #Resistor R2, k\u2126\n", + "VB_found=4.0; #Measured base voltage, V\n", + "\n", + "#Calculations\n", + "VB=(VT*R1)/(R1+R2); #Theoretical base voltage, V\n", + "\n", + "if(VB_found==VB):\n", + " print(\"The circuit is operating properly.\");\n", + "else:\n", + " print(\"The circuit is not operating properly.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The circuit is not operating properly.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.13 : Page number 258-259\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "R1=40.0; #Resistor R1, k\u2126\n", + "R2=10.0; #Resistor R2, k\u2126\n", + "RC=6.0; #Collector resistor, k\u2126\n", + "RE=2.0; #Emitter resistor, k\u2126\n", + "beta=80; #Base current amplification factor\n", + "VBE=0.7; #Base emitter voltage, V\n", + "\n", + "#Calculations\n", + "V2=(VCC*R2)/(R1+R2); #Voltage across resistor R2, V\n", + "VE=V2-VBE; #Emitter voltage, V\n", + "IE=VE/RE; #Emitter current, mA\n", + "re=25/IE; #a.c emitter resistance, \u2126\n", + "\n", + "\n", + "#Results\n", + "print(\"a.c emitter resistance= %.2f \u2126.\"%re);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "a.c emitter resistance= 38.46 \u2126.\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.14 : Page number 262-263\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "R1=150.0; #Resistor R1, k\u2126\n", + "R2=20.0 #Resistor R2, k\u2126\n", + "RC=12.0; #Collector resistor, k\u2126\n", + "RE=2.2; #Emitter resistor, k\u2126\n", + "\n", + "\n", + "#Calculations\n", + "V2=round(VCC*R2/(R1+R2),2); #Voltage across R2, V\n", + "VE=round(V2-VBE,2); #Voltage across emitter resistor, V\n", + "IE=round(VE/RE,2); #Emitter current, mA\n", + "re=round(25/IE,1); #a.c emitter resistance, \u2126\n", + "\n", + "\n", + "#(i)\n", + "#CE(emitter capacitor) connected in the circuit:\n", + "Av=(RC*1000)/re; #Voltage gain for emitter capacitor connected.\n", + "\n", + "print(\"(i)Voltage gain= %d.\"%Av);\n", + "\n", + "#(ii)\n", + "#CE(emitter capacitor) removed from the circuit:\n", + "Av=(RC*1000)/(re+RE*1000); #Voltage gain for emitter capacitor removed.\n", + "\n", + "print(\"(ii)Voltage gain= %.2f.\"%Av);\n", + "\n", + "#Note: The answer in the text book has been approximated to 5.38 but it's actually coming 5.37.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)Voltage gain= 360.\n", + "(ii)Voltage gain= 5.37.\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.15 : Page number 263\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RC=6.0; #Collector resistor, k\u2126\n", + "RL=12.0; #Load resistor, k\u2126\n", + "re=33.3; #a.c emitter resistance, \u2126\n", + "\n", + "\n", + "#Calculations\n", + "RAC=RC*RL/(RC+RL); #a.c effective load, k\u2126\n", + "Av=RAC*1000/re; #Voltage gain\n", + "\n", + "#Result\n", + "print(\"Voltage gain= %d.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain= 120.\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.16 : Page number 263-264\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=9.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "R1=240.0; #Resistor R1, k\u2126\n", + "R2=30.0 #Resistor R2, k\u2126\n", + "RC=20.0; #Collector resistor, k\u2126\n", + "RE=3.0; #Emitter resistor, k\u2126\n", + "\n", + "\n", + "#Calculations\n", + "#(i)\n", + "V2=round(VCC*R2/(R1+R2),1); #Voltage across R2, V\n", + "VE=round(V2-VBE,1); #Voltage across emitter resistor, V\n", + "IE=round(VE/RE,1); #Emitter current, mA\n", + "re=25/IE; #a.c emitter resistance, \u2126\n", + "\n", + "#(ii)\n", + "Av=RC*1000/re; #Voltage gain\n", + "\n", + "#(iii)\n", + "V_C_in=V2; #d.c voltage across input capacitor, V\n", + "V_C_E=VE; #d.c vooltage across emitter capacitor, V\n", + "\n", + "\n", + "\n", + "#Results\n", + "print(\"(i) a.c emitter resistance=%d \u2126.\"%re);\n", + "print(\"(ii) Voltage gain =%d.\"%Av);\n", + "print(\"(iii) d.c voltage across input capacitor= %dV and emitter capacitor=%.1fV.\"%(V_C_in,V_C_E));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) a.c emitter resistance=250 \u2126.\n", + "(ii) Voltage gain =80.\n", + "(iii) d.c voltage across input capacitor= 1V and emitter capacitor=0.3V.\n" + ] + } + ], + "prompt_number": 30 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.17 : Page number 264-265" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "R1=40.0; #Resistor R1, k\u2126\n", + "R2=10.0 #Resistor R2, k\u2126\n", + "RC=2.0; #Collector resistor, k\u2126\n", + "RE=1.0; #Emitter resistor, k\u2126\n", + "RL=1.0; #Load resistor, k\u2126\n", + "beta=100; #Base current amplification factor\n", + "\n", + "#Calculation\n", + "#(i) D.C bias levels\n", + "V2=VCC*R2/(R1+R2); #Voltage across R2, V\n", + "VE=round(V2-VBE,1); #Voltage across emitter resistor, V\n", + "IE=round(VE/RE,1); #Emitter current, mA\n", + "IC=IE; #Collector current, mA\n", + "IB=IC/beta; #Base current, mA\n", + "VC=VCC-IC*RC; #Collector voltage, V\n", + "print(\"(i) D.C bias levels: V2=%dV, VE=%.1fV, IE=%.1fmA, IC=%.1fmA, IB=%.3fmA and VC=%.1fV.\"%(V2,VE,IE,IC,IB,VC));\n", + "\n", + "\n", + "#(ii)\n", + "Cin_V=V2; #Voltage across Cin capacitor, V\n", + "CE_V=VE; #Voltage across CE capacitor, V \n", + "CC_V=VC; #Voltage across CC capacitor, V\n", + "print(\"(ii) D.c voltage across: Cin=%dV and CE=%.1fV and CC=%.1fV.\"%(Cin_V,CE_V,CC_V));\n", + "\n", + "#(iii)\n", + "re=round(25/IE,1); #a.c emitter resistance, \u2126\n", + "print(\"(iii) a.c emitter resistance=%.1f\u2126.\"%re);\n", + "\n", + "\n", + "#(iv)\n", + "RAC=round(RC*RL/(RC+RL),3); #Total a.c collector resistance, k\u2126\n", + "Av=RAC/(re/1000); #Voltage gain\n", + "print(\"(iv) Voltage gain=%.1f.\"%Av);\n", + "\n", + "#(v)\n", + "print(\"(v) VC>VE. Therefore, the transistor is in active state.\" );\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) D.C bias levels: V2=3V, VE=2.3V, IE=2.3mA, IC=2.3mA, IB=0.023mA and VC=10.4V.\n", + "(ii) D.c voltage across: Cin=3V and CE=2.3V and CC=10.4V.\n", + "(iii) a.c emitter resistance=10.9\u2126.\n", + "(iv) Voltage gain=61.2.\n", + "(v) VC>VE. Therefore, the transistor is in active state.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.18 : page number 265\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=132.0; #Voltage gain\n", + "beta=200.0; #Base current amplification factor\n", + "P_in=60.0; #Input power, \ud835\udf07W\n", + "\n", + "\n", + "#Calculations\n", + "Ap=beta*Av; #Power gain\n", + "P_out=Ap*(P_in/10**6); #Output power, W\n", + "\n", + "\n", + "#Results\n", + "print(\"The power gain = %d and output power = %.3fW.\"%(Ap,P_out));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The power gain = 26400 and output power = 1.584W.\n" + ] + } + ], + "prompt_number": 32 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.19 : page number 265-266\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "IB=200.0; #Base current, microampere\n", + "IE=10.0; #Emitter current, mA\n", + "R1=27.0; #Resistor R1, kilo ohm\n", + "R2=13.0 #Resistor R2, kilo ohm\n", + "RC=4.7; #Collector resistor, kilo ohm\n", + "RE=2.2; #Emitter resistor, kilo ohm\n", + "\n", + "\n", + "#Calculations\n", + "#(i)\n", + "IC=IE-(IB/1000); #Collector current, mA\n", + "beta=IC/(IB/1000); #Current gain\n", + "\n", + "print(\"(i) Current gain=%d\"%beta);\n", + "\n", + "#(ii)\n", + "#a.c emitter resistance is neglected, voltage gain=(collector resistor)/(emitter resistor)\n", + "Av=RC/RE; #Voltage gain\n", + "\n", + "print(\"(ii) Voltage gain=%.2f\"%Av);\n", + "\n", + "#(iii)\n", + "Ap=round(beta*Av,0); #Power gain\n", + "\n", + "#Results\n", + "print(\"(iii) Power gain=%d.\"%Ap);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Current gain=49\n", + "(ii) Voltage gain=2.14\n", + "(iii) Power gain=105.\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.20 : Page number 266-267\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=30.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base emitter voltage, V\n", + "R1=45.0; #Resistor R1, k\u2126\n", + "R2=15.0 #Resistor R2, k\u2126\n", + "RC=10.0; #Collector resistor,k\u2126\n", + "RE=7.5; #Emitter resistor, k\u2126\n", + "beta=200.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "V2=round(VCC*R2/(R1+R2),1); #Voltage across R2, V (Voltage divider rule)\n", + "VE=V2; #Voltage across emitter resistor(base-emitter voltage is neglected), V\n", + "IE=VE/RE; #Emitter current, mA (OHM's LAW)\n", + "re=25/IE; #a.c emitter resistance, ohm\n", + "Zin_base=(beta*re)/1000; #input impedance of transistor base,k\u2126\n", + "R1_R2=(R1*R2)/(R1+R2); #Parallel resistance between R1 and R2, k\u2126\n", + "Zin=((R1_R2)*Zin_base)/(R1_R2+Zin_base); #Input impedance of the amplifier circuit, k\u2126\n", + "\n", + "\n", + "#Result\n", + "print(\"The input impedance of the amplifier circuit= %.2f k\u2126.\"%Zin); \n", + "\n", + "#Note: The input impedance of the amplifier circuit is approximated as 3.45 k\u2126 in the text book, but actually it's 3.46 k\u2126.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The input impedance of the amplifier circuit= 3.46 k\u2126.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.21 : Page Number 268-269\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V.\n", + "RC=1.5; #Collector resistor, k\u2126.\n", + "R1=18.0; #Resistor R1, k\u2126.\n", + "R2=4.7; #Resistor R2, k\u2126.\n", + "RE1=300.0; #Emitter resistor 1, \u2126.\n", + "RE2=900.0; #Emitter resistor 2, \u2126.\n", + "VBE=0.7; #Base-emitter voltage, V.\n", + "beta=150.0; #Base current amplification factor.\n", + "\n", + "\n", + "#Calculations\n", + "V2=round(VCC*R2/(R1+R2),1); #d.c voltage across R2, V. (Voltage divider rule)\n", + "VE=round(V2-VBE,1); #d.c voltage across RE, V.\n", + "IE=round((VE/(RE1+RE2))*1000,2); #d.c emitter current, mA.(OHM'S LAW)\n", + "re=round(25/IE,1); #a.c emitter resistance, \u2126.\n", + "Av=RC*1000/(re+RE1); #Voltage gain\n", + "Zin_base=(beta*(re+RE1))/1000; #Input impedance of transistor base, k\u2126.\n", + "\n", + "\n", + "#Results\n", + "print(\"The voltage gain of the swamped amplifier= %.2f.\"%Av);\n", + "print(\"Input impedance of transistor base of the swamped amplifier= %.2f k\u2126.\"%Zin_base);\n", + "\n", + "#Note:In the textbook Av is approximated to 4.66and Zin_base to 48.22 kilo ohm, but the actual answers come as 4.67 and 48.21 kilo ohm.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain of the swamped amplifier= 4.67.\n", + "Input impedance of transistor base of the swamped amplifier= 48.21 k\u2126.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.22 : Page number 269\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RC=1.5; #Collector resistor, k\u2126.\n", + "RE1=300.0; #Emitter resistor 1, \u2126.\n", + "re=21.5; #a.c emitter resistance, \u2126.\n", + "\n", + "#Calculations\n", + "Av=round(RC*1000/(re+RE1),2); #Voltage gain.\n", + "Av_1=round(RC*1000/(2*re+RE1),2); #Voltage gain when re doubles.\n", + "change_in_gain=round(Av-Av_1,2); #Change in voltage gain.\n", + "change_percentage=change_in_gain*100/Av; #Change percentage\n", + "\n", + "\n", + "#Results\n", + "if(change_in_gain>0):\n", + " print(\"The percentage change from the original value= %.2f%%(decrease)\"%change_percentage);\n", + "else:\n", + " print(\"The percentage change from the original value= %.2f%%(increase)\"%change_percentage);\n", + "\n", + "\n", + "#Note: The percentage has been approximated in the text book as 6.22%, but the answer comes as 6.42%.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The percentage change from the original value= 6.42%(decrease)\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.23 : Page number 269-270\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base emitter voltage, V\n", + "R1=10.0; #Resistor R1, kilo ohm\n", + "R2=2.2; #Resistor R2, kilo ohm\n", + "RC=4.0; #Collector resistor, kilo ohm\n", + "RE=1.1; #Emitter resistor, kilo ohm\n", + "beta=200.0; #Base current amplification factor\n", + "RE1=210.0; #Emitter resistor 1 of swamped amplifier, ohm.\n", + "RE2=900.0; #Emitter resistor 2 of swamped amplifier, ohm.\n", + "\n", + "\n", + "#Calculations\n", + "V2=round(VCC*R2/(R1+R2),1); #d.c voltage across R2, V. (Voltage divider rule)\n", + "VE=round(V2-VBE,1); #d.c voltage across RE, V.\n", + "IE=(VE/RE); #d.c emitter current, mA.(OHM'S LAW)\n", + "re=25/IE; #a.c emitter resistance, ohm.\n", + "\n", + "\n", + "#(i) Zin_base:\n", + "Zin_base_standard=(beta*re)/1000; #input impedance of transistor base for standard amplifier , kilo ohm.\n", + "Zin_base_swamped=(beta*(re+RE1))/1000; #input impedance of transistor base for swamped amplifier, kilo ohm.\n", + "\n", + "\n", + "#(ii) Zin:\n", + "#input impedance for standard amplifier circuit\n", + "Zin_standard=(((R1*R2)/(R1+R2))*Zin_base_standard)/(Zin_base_standard +((R1*R2)/(R1+R2))); #kilo ohm\n", + "\n", + "#input impedance for standard amplifier circuit\n", + "Zin_swamped=(((R1*R2)/(R1+R2))*Zin_base_swamped)/(Zin_base_swamped +((R1*R2)/(R1+R2))); #kilo ohm\n", + "\n", + "\n", + "#Results\n", + "print(\"(i) input impedance of transistor base for standard amplifier= %d kilo ohm\"%Zin_base_standard);\n", + "print(\" input impedance of transistor base for swamped amplifier= %d kilo ohm\"%Zin_base_swamped);\n", + "print(\"(ii) input impedance for standard amplifier= %.2f kilo ohm\"%Zin_standard);\n", + "print(\" input impedance for swamped amplifier= %.2f kilo ohm\"%Zin_swamped);\n", + "\n", + "\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) input impedance of transistor base for standard amplifier= 5 kilo ohm\n", + " input impedance of transistor base for swamped amplifier= 47 kilo ohm\n", + "(ii) input impedance for standard amplifier= 1.33 kilo ohm\n", + " input impedance for swamped amplifier= 1.74 kilo ohm\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.24 : Page number 270-271\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RC=4.0; #Collector resistor, kilo ohm\n", + "re=25.0; #a.c emitter resistance, ohm (calculated in example 10.23)\n", + "RE_1=210.0; #Emitter resistor 1 of swamped amplifier,ohm\n", + "\n", + "#Calculation\n", + "Av_standard=(RC*1000)/re; #Voltage gain of standard common emitter amplifier\n", + "Av_swamped=(RC*1000)/(re+RE_1); #Voltage gain of swamped amplifier\n", + "\n", + "#Results\n", + "print(\"The voltage gain of standard amplifier=%d.\"%Av_standard);\n", + "print(\"The voltage gain of swamped amplifier=%d.\"%Av_swamped);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain of standard amplifier=160.\n", + "The voltage gain of swamped amplifier=17.\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.26 : Page number 273-274\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_0=1000.0; #Open circuit voltage gain\n", + "R_in=2.0; #Input resistance, kilo ohm\n", + "R_out=1.0; #Output resistance, ohm\n", + "RL=4; #Load resistor across the output, ohm\n", + "I_2=0.5; #Output signal current, A.\n", + "\n", + "\n", + "#Calculations\n", + "#Since A_0*(I_1*R_in) = I_2*(R_out+RL)\n", + "I_1=I_2*(R_out+RL)/(A_0*(R_in*1000)); #Input current, A\n", + "V_1=I_1*(R_in*1000); #Input signal voltage, V\n", + "V_1=V_1*1000; #Input signal voltage, mV\n", + "\n", + "print(\"The required input signal voltage =%.1fmV\"%V_1);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The required input signal voltage =2.5mV\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.27 : Page number 274\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_0=1000.0; #Open circuit voltage gain\n", + "R_in=7.0; #Input resistance, kilo ohm\n", + "R_out=15.0; #Output resistance, ohm\n", + "RL=35.0; #Load resistor across the output, ohm\n", + "R_s=3.0; #Internal resistance, kilo ohm\n", + "E_s=10.0; #Input signal voltage, mV.\n", + "\n", + "#Calculations\n", + "#(i)\n", + "I_1=E_s*(10**-3)/(R_s*1000+R_in*1000); #Input current, A\n", + "V_1=I_1*(R_in*1000); #Voltage across input resistance, V\n", + "\n", + "#Since, A_v=V_2/V_1 = A_0*RL/(R_out+RL)\n", + "A_v=A_0*RL/(R_out+RL); #Voltage gain\n", + "V_2=A_v*V_1; #Outout voltage, V\n", + "\n", + "\n", + "#(ii)\n", + "P_2=V_2**2/RL; #Output power, W\n", + "P_1=V_1**2/(R_in*1000); #Input power, W\n", + "A_p=round(P_2/P_1,-6); #Power gain\n", + "\n", + "\n", + "#Result\n", + "print(\"The magnitude of output voltage = %.1fV\"%V_2);\n", + "print(\"The power gain =%de-06.\"%(A_p/10**6));\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The magnitude of output voltage = 4.9V\n", + "The power gain =98e-06.\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 10.28 : Page number 274-275\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_v=80.0; #Voltage gain\n", + "V_2=1.0; #Output voltage, V\n", + "A_i=120.0; #Current gain\n", + "RL=2; #Load resistor, kilo ohm\n", + "\n", + "#Calculation\n", + "V_1=(V_2/A_v)*1000; #Input signal voltage, mV\n", + "\n", + "#Since, A_i=A0*R_in/(R_out+RL) and A_v=A0*RL/(R_out+RL)\n", + "#So, A_v/A_i=RL/R_in\n", + "R_in=RL*A_i/A_v; #Input resistance, kilo ohm\n", + "I_1=V_1/R_in; #Input current, \u03bcA\n", + "A_p=A_i*A_v; #Power gain\n", + "\n", + "#Results\n", + "print(\"Necessary input signal voltage= %.1fmV\"%V_1);\n", + "print(\"Input signal current =%.2f \u03bcA\"%I_1);\n", + "print(\"Power gain = %d.\"%A_p);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Necessary input signal voltage= 12.5mV\n", + "Input signal current =4.17 \u03bcA\n", + "Power gain = 9600.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter11_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter11_1.ipynb new file mode 100644 index 00000000..6e0fb200 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter11_1.ipynb @@ -0,0 +1,1025 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:8e425c9c2dfbfee43b3a89e44b0fd7936ba869da73ac3c372e9b23848f1cded1" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#CHAPTER 11 : MULTISTAGE TRANSISTOR AMPLIFIERS" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 11.1 : Page number 285" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from math import log10\n", + "#Variable declaration\n", + "#(i)\n", + "A_v=30; #Voltage gain\n", + "\n", + "#(ii)\n", + "A_p=100; #Power gain\n", + "\n", + "\n", + "#Calculations\n", + "#(i)\n", + "A_v_dB=20*log10(A_v); #Voltage gain, dB\n", + "A_p_dB=10*log10(A_p); #Power gain, dB\n", + "\n", + "#Results\n", + "print(\"(i) Voltage gain in dB=%.2fdB\"%A_v_dB);\n", + "print(\"(ii) Power gain in dB=%ddB\"%A_p_dB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Voltage gain in dB=29.54dB\n", + "(ii) Power gain in dB=20dB\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.2 : Page number 285-286\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#(i)\n", + "A_p_dB=40.0; #Power gain in dB\n", + "A_p_b=A_p_dB/10; #Power gain in bel\n", + "A_p=10**A_p_b; #Power gain in number\n", + "\n", + "#Result\n", + "print(\"(i) Power gain in number=%d\"%A_p);\n", + "\n", + "#(ii)\n", + "A_p_dB=43.0; #Power gain in dB\n", + "A_p_b=A_p_dB/10; #Power gain in bel\n", + "A_p=round(10**A_p_b,-4); #Power gain in number\n", + "\n", + "#Result\n", + "print(\"(ii) Power gain in number=%d\"%A_p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Power gain in number=10000\n", + "(ii) Power gain in number=20000\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.3 : Page number 286\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from math import log10\n", + "\n", + "#Variable declaration\n", + "Av_1=100.0; #Voltage gain of stage 1\n", + "Av_2=200.0; #Voltage gain of stage 2\n", + "Av_3=400.0; #Voltage gain of stage 3\n", + "\n", + "#Calculations\n", + "Av_1_dB=20*log10(Av_1); #Voltage gain of stage 1, dB\n", + "Av_2_dB=20*log10(Av_2); #Voltage gain of stage 2, dB\n", + "Av_3_dB=20*log10(Av_3); #Voltage gain of stage 3, dB\n", + "\n", + "Av_T=Av_1_dB+Av_2_dB+Av_3_dB; #Total voltage gain\n", + "\n", + "#Result\n", + "print(\"The total voltage gain=%ddB\"%Av_T);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The total voltage gain=138dB\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.4 : Page number 286\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "A_p_absolute=30.0; #Absolute gain of each stage\n", + "number_of_stages=5.0; #number of stages\n", + "negative_feedback=10.0; #negative feedback, dB\n", + "\n", + "#Calculations\n", + "#(i)\n", + "A_p_dB=round(10*log10(A_p_absolute),2); #Power gain of one stage. dB\n", + "A_p_T=number_of_stages * A_p_dB; #Total power gain, dB\n", + "\n", + "#(ii)\n", + "A_p_resultant=A_p_T-negative_feedback; #Resultant power gain with negative feedback, dB\n", + "\n", + "#Results\n", + "print(\"The total power gain = %.2fdB.\"%A_p_T);\n", + "print(\"The resultant power gain with negative feedback = %.2fdB.\"%A_p_resultant);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The total power gain = 73.85dB.\n", + "The resultant power gain with negative feedback = 63.85dB.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.5 : Page number 286\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "P_out_2kHz=1.5; #Output power at 2 kHz, W\n", + "P_out_20kHz=0.3; #Output power at 20 kHz, W\n", + "P_in=10.0; #Input power, mW\n", + "\n", + "#Calculations\n", + "A_p_dB_2kHz=10*log10(P_out_2kHz*1000/P_in); #dB power gain at 2 kHz\n", + "A_p_dB_20kHz=10*log10(P_out_20kHz*1000/P_in); #dB power gain at 20 kHz\n", + "Fall_in_gain=A_p_dB_2kHz-A_p_dB_20kHz; #Fall in gain from 2kHz to 20kHz\n", + "\n", + "#Results\n", + "print(\"The fall in gain from 2kHz to 20kHz=%.2fdB\"%Fall_in_gain);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The fall in gain from 2kHz to 20kHz=6.99dB\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.6 : Page number 287\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "A_v=15.0; #Voltage gain, dB\n", + "V_1=0.8; #Input signal voltage, V\n", + "\n", + "#Calculations\n", + "#Since, Av(in decibel)=20*log10(V_2/V_1),\n", + "V_2=V_1*(10**(A_v/20)); #Output voltage, V\n", + "\n", + "#Results\n", + "print(\"The output voltage= %.1fV.\"%V_2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output voltage= 4.5V.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.7 : Page number 287\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_0_dB=70.0; #Open circuit voltage gain, dB\n", + "A_v_dB=67.0; #Voltage gain, dB\n", + "R_out=1.5; #Output resistance, kilo ohm\n", + "\n", + "#Calculations\n", + "#Since, A_0_dB-A_v_dB=20*log10(A_0/A_v)\n", + "ratio_A0_Av=round(10**((A_0_dB-A_v_dB)/20),2); #Ratio of open-circuit voltage gain to normal voltage gain\n", + "\n", + "#Since, A_v/A_0 = RL/(R_out+RL)\n", + "RL=R_out/(ratio_A0_Av-1); #Load resistor, kilo ohm\n", + "\n", + "\n", + "#Results\n", + "print(\"The load resistance=%.2f kilo ohm.\"%RL);\n", + "\n", + "#Note: The value of load resistor is calculated to be 3.6585 kilo ohm and approximated to 3.66. But, in the text it has been approximated to 3.65.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The load resistance=3.66 kilo ohm.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.8 : Page number 287\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RL=1.0; #Load resistance, kilo ohm\n", + "A_v=40.0; #Voltage gain, dB\n", + "V_in=10.0; #Input signal voltage, mV\n", + "\n", + "#Calcultaions\n", + "#(i)\n", + "#Since, A_v=20*log10(V_out/V_in)\n", + "V_out=V_in*(10**(A_v/20))/1000; #Output voltage, V\n", + "\n", + "#(ii)\n", + "P_L=(V_out**2/RL); #The load power, mW\n", + "\n", + "\n", + "#Results\n", + "print(\"(i)The output voltage is %dV.\"%V_out);\n", + "print(\"(ii)The load poweris %dmW.\"%P_L);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)The output voltage is 1V.\n", + "(ii)The load poweris 1mW.\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.9 : Page number 287-288\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from math import log10\n", + "\n", + "#Variable declaration\n", + "P_2=40.0; #Output power, W\n", + "R=10.0; #Resistance of speaker, ohm\n", + "\n", + "\n", + "#Calculations\n", + "#(i)\n", + "A_p_dB=25.0; #Power gain, dB\n", + "#Since, A_p_dB=10*log10(P_2/P_1)\n", + "P_1=(P_2/10**(A_p_dB/10))*1000; #Input power, mW\n", + "\n", + "\n", + "#(ii)\n", + "A_v_dB=40.0; #Voltage gain, dB\n", + "\n", + "#Since, P=(V**2)/R,\n", + "V_2=(P_2*R)**0.5; #Output voltage, V\n", + "\n", + "#Since, A_v_dB=20*log10(V_2/V_1)\n", + "V_1=(V_2/10**(A_v_dB/20))*1000; #Input voltage, mV\n", + "\n", + "\n", + "#Results\n", + "\n", + "print(\"(i)The input power=%.1fmW.\"%P_1);\n", + "print(\"(ii)The input voltage=%dmV.\"%V_1);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)The input power=126.5mW.\n", + "(ii)The input voltage=200mV.\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.10 : Page number 288\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_v_max=2000.0; #Maximum voltage gain\n", + "f_max=2.0; #Frequency at which maximum voltage gain occurs,kHz\n", + "A_v=1414.0; #Voltage gain at 50 Hz and 10kHz\n", + "f1=50; #Lower frequency at which gain is 1414, Hz\n", + "f2=10; #Upper frequency at which gain is 1414, kHz\n", + "\n", + "#Calculation\n", + "#Since, bandwidth is the range of frequency over which gain is greater than or equal to 70.7% of maximum gain\n", + "if((A_v/A_v_max)*100 ==70.7): \n", + " print(\"(i)The bandwidth is from %dHz to %dkHz.\"%(f1,f2));\n", + " print(\"(ii)The lower cut-off frequency=%dHz.\"%f1);\n", + " print(\"(iii)The upper cut-off frequency=%dkHz.\"%f2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)The bandwidth is from 50Hz to 10kHz.\n", + "(ii)The lower cut-off frequency=50Hz.\n", + "(iii)The upper cut-off frequency=10kHz.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.11 : Page number 291\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_v=60.0; #Voltage gain of single stage amplifier\n", + "R_C=500.0; #Collector load, ohm\n", + "R_in=1.0; #Input impedance, kilo ohm\n", + "\n", + "\n", + "#Calculation\n", + "#Since, there is no loading , second stage gain remains at A_v\n", + "#But, due to loading effect of input impedance of second stage, gain of first stage decreases\n", + "A_v_2=A_v; #Voltage gain of second stage\n", + "R_AC=round((R_C*R_in*1000)/(R_C+R_in*1000),0); #Effective load of first stage, ohm\n", + "A_v_1=A_v*R_AC/R_C; #Gain of first stage\n", + "A_v_T=A_v_1*A_v_2; #Total gain\n", + "\n", + "\n", + "#Results\n", + "print(\"The total gain=%d.\"%A_v_T);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The total gain=2397.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.12 : Page number 291-292\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rin=1.0; #Input resistance, kilo ohm\n", + "beta=100.0; #base current amplification factor\n", + "RC=2.0; #Collector load, kilo ohm\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "R_AC=(RC*Rin)/(RC+Rin); #Effective load on first stage, kilo ohm\n", + "A_v_1=round(beta*(R_AC/Rin),0); #Voltage gain of first stage\n", + "\n", + "#(ii)\n", + "A_v_2=round(beta*RC/Rin,0); #Voltage gain of second stage\n", + "\n", + "#(iii)\n", + "A_v_T=A_v_1*A_v_2; #Total voltage gain\n", + "\n", + "\n", + "#Results\n", + "print(\"(i)The voltage gain of first stage =%d.\"%A_v_1);\n", + "print(\"(ii)The voltage gain of second stage =%d.\"%A_v_2);\n", + "print(\"(iii)The total voltage gain =%d.\"%A_v_T);\n", + "\n", + "#Note: The approximation inthe text for A_v_1=66.66 is taken as 66 but here it has been taken 67 and therefore the total voltage is 13400 instead of 13200.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)The voltage gain of first stage =67.\n", + "(ii)The voltage gain of second stage =200.\n", + "(iii)The total voltage gain =13400.\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.13 : Page number 292\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RC=10.0; #Collector load of single stage amplifier, kilo ohm\n", + "Rin=1.0; #Input resistance, kilo ohm\n", + "beta=100.0; #base current amplification factor\n", + "RL=100.0; #Load resistor, ohm\n", + "\n", + "\n", + "#Calculations\n", + "R_AC=round((RC*1000)*RL/(RC*1000+RL),-1); #Effective collector load,\n", + "A_v=beta*R_AC/(Rin*1000); #Voltage gain\n", + "\n", + "#Results\n", + "print(\"The voltage gain=%d.\"%A_v);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain=10.\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.14 : Page number 292-293\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector suppply voltage, V\n", + "R1=10.0; #resistor R1, kilo ohm\n", + "R2=2.2; #resistor R2, kilo ohm\n", + "R3=10.0; #resistor R3, kilo ohm\n", + "R4=2.2; #resistor R4, kilo ohm\n", + "RC_1=3.6; #Collector resistor of first stage, kilo ohm\n", + "RC_2=4.0; #Collector resistor of second stage, kilo ohm\n", + "RE_1=900.0; #Emitter resistor of first stage, ohm\n", + "RE_2=1.0; #Emitter resistor of second stage, kilo ohm\n", + "\n", + "\n", + "#Calculations\n", + "#Biasing potential for the second stage is the voltage across R4 resistor,\n", + "#so, by voltage divider rule:\n", + "VB=VCC*R4/(R3+R4); #Biasing potential for second stage,(Voltage across R4), V\n", + "\n", + "print(\"The biasing voltage for the second stage=%.1fV.\"%VB);\n", + "\n", + "#If coupling capacitor C_c is replaced by a wire, RC_1 and R3 become parallel\n", + "Req=round((RC_1*R3)/(RC_1+R3),2); #Equivalent resistance of R3 parallel with RC_1, kilo ohm\n", + "VB=VCC*R4/(Req+R4); #Biasing voltage if coupling capacitor is replaced by a wire, V\n", + "\n", + "print(\"The biasing voltage after replacing coupling capacitor by wire=%.2fV.\"%VB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The biasing voltage for the second stage=3.6V.\n", + "The biasing voltage after replacing coupling capacitor by wire=9.07V.\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.15 : Page number 293-294\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Function for calculating parallel resistance\n", + "def pr(r1,r2):\n", + " return (r1*r2)/(r1+r2);\n", + "\n", + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage, V\n", + "R1=22.0; #Resistor R1, kilo ohm\n", + "R2=3.3; #Resistor R2, kilo ohm\n", + "R3=5.0; #Resistor R3, kilo ohm\n", + "R4=1.0; #Resistor R4, kilo ohm\n", + "R5=15.0; #Resistor R5, kilo ohm\n", + "R6=2.5; #Resistor R6, kilo ohm\n", + "R7=5.0; #Resistor R7, kilo ohm\n", + "R8=1.0; #Resistor R8, kilo ohm\n", + "beta=200; #Base current amplification factor\n", + "RL=10.0; #Load resistor, kilo ohm\n", + "V_BE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculations\n", + "#for 2nd stage\n", + "V_R6=round(VCC*R6/(R5+R6),2); #Voltage across R6, V (voltage divider rule)\n", + "V_R8=round(V_R6-V_BE,2); #Voltage across R8, V\n", + "IE_2=round(V_R8/R8,2); #Emitter current through R8, mA (OHM's LAW)\n", + "re_2nd_stage=round(25/IE_2,1); #a.c emitter resistance for 2nd stage, ohm\n", + "\n", + "#For 1st stage\n", + "V_R2=round(VCC*R2/(R1+R2),2); #Voltage across R2, V (voltage divider rule)\n", + "V_R4=round(V_R2-V_BE,2); #Voltage across R4, V\n", + "IE_1=round(V_R4/R4,2); #Emitter current through R4, mA (OHM's LAW)\n", + "re_1st_stage=round(25/IE_1,1); #a.c emitter resistance for 1st stage, ohm\n", + "\n", + "#(i)\n", + "Zin_base_2nd_stage=round((beta*re_2nd_stage)/1000,2); #input resistance of transistor base of 2nd stage, kilo ohm\n", + "Zin=round(pr(pr(R5,R6),Zin_base_2nd_stage),2); #Input impedance of the 2nd stage, kilo ohm\n", + "R_AC_1st_stage=round(pr(R3,Zin),2); #Effective collector load for 1st stage, kilo ohm\n", + "A_v_1=round(R_AC_1st_stage*1000/re_1st_stage,0); #voltage gain of 1st stage\n", + "\n", + "#(ii)\n", + "R_AC_2nd_stage=round(pr(R7,RL),2); #Effective collector load for 2nd stage, kilo ohm\n", + "A_v_2=round(R_AC_2nd_stage*1000/re_2nd_stage,1); #voltage gain of 2nd stage\n", + "\n", + "#(iii)\n", + "A_v_overall=A_v_1*A_v_2; #overall voltage gain\n", + "\n", + "\n", + "#results\n", + "print(\"(i)The voltage gain of 1st stage=%.0f.\"%A_v_1);\n", + "print(\"(i)The voltage gain of 2nd stage=%.1f.\"%A_v_2);\n", + "print(\"(i)The overall voltage gain =%d.\"%A_v_overall);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)The voltage gain of 1st stage=53.\n", + "(i)The voltage gain of 2nd stage=191.4.\n", + "(i)The overall voltage gain =10144.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.16 : Page number 297\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Primary_impedance=1000.0; #Primary impedance, ohm\n", + "Load_impedance=10.0; #Load impedance, ohm\n", + "\n", + "#Calculation\n", + "#since,for maximum power transfer primary impedance should be equal to output impedance\n", + "#and, impedance of secondary should be equal to load impedance\n", + "#therfore, primary_impedance/load_impedance=square of(primary to secondary turn ratio)\n", + "n=(Primary_impedance/Load_impedance)**0.5; #Primary to secondary turn ratio\n", + "\n", + "\n", + "#Result\n", + "print('The primary to secondary turn ratio for maximum power transfer=%d.'%n);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The primary to secondary turn ratio for maximum power transfer=10.\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.17 : Page number 297\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RL=16.0; #Load resistor, ohm\n", + "R_p=10.0; #Output impedance of primary, kilo ohm\n", + "Vp=10.0; #Terminal voltage of the source, V\n", + "\n", + "#Calculation\n", + "#Since, for maximum power transfer, the impedance of the primary should be equal to output impedance of the source\n", + "n=(R_p*1000/RL)**0.5; #Primary to secondary turns ratio\n", + "\n", + "#Since, power in a transformer remains constant,\n", + "#ratio of primary to secondary voltageis equal to primary to secondary turns ratio\n", + "Vs=Vp/n; #Voltage across the external load, V\n", + "\n", + "\n", + "#Result\n", + "print(\"The primary to secondary turns ratio=%d.\"%n);\n", + "print(\"The voltage across the external load=%.1fV.\"%Vs);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The primary to secondary turns ratio=25.\n", + "The voltage across the external load=0.4V.\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.18 : Page number 297-298\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rp=300.0; #D.C resistance of primary, ohm\n", + "RL=3.0; #Load resistance, ohm\n", + "R_out=3.0; #Ouput resistance of the transistor, kilo ohm \n", + "\n", + "#Calculation\n", + "#when no signal is applied, only Rp is seen to be the load.\n", + "#But, when a.c signal is applied, RL in secondary reflects as RL*(squre of turns ratio).\n", + "#Therefore, load is seen to be Rp in series with the reflected RL in primary.\n", + "#i.e, R_out=Rp+(n**2 * RL), where n is the turns ratio\n", + "n=((R_out*1000-Rp)/RL)**0.5; #turns ratio\n", + "\n", + "#Result\n", + "print(\"Turns ratio for maximum power transfer=%d.\"%n);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Turns ratio for maximum power transfer=30.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.19 : Page number 298" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "f=200.0; #Frequency, Hz\n", + "Z_out=10.0; #Output impedance of the transistor, kilo ohm\n", + "Z_in=2.5; #Input impedance of the next stage, kilo ohm\n", + "\n", + "#Calculation\n", + "#For perfect impedance matching,\n", + "#Z_out should be equal to primary impedance\n", + "#Z_out=2*pi*f*(primary inductance)\n", + "Lp=(Z_out*1000)/(2*pi*f); #Primary inductance, H\n", + "\n", + "#for the secondary side,\n", + "#Z_in should be equal to impedance of secondary\n", + "Ls=(Z_in*1000)/(2*pi*f); #Secondary inductance, H\n", + "\n", + "\n", + "#result\n", + "print(\"The primary inductance=%.0fH.\"%Lp);\n", + "print(\"The secondary inductance=%.0fH.\"%Ls);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The primary inductance=8H.\n", + "The secondary inductance=2H.\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.20 : Page number 299\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Lp=8.0; #Primary inductance, H\n", + "Ls=2.0; #Secondary inductance, H\n", + "K=10**-5; #Inductance to turns ratio, constant\n", + "\n", + "#Calculations\n", + "Np=(Lp/K)**0.5; #Primary turns\n", + "Ns=(Ls/K)**0.5; #Secondary turns\n", + "\n", + "#Result\n", + "print(\"The primary turns=%.0f.\"%Np);\n", + "print(\"The secondary turns=%.0f.\"%Ns);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The primary turns=894.\n", + "The secondary turns=447.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 11.21 : Page number 300-301\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage, V\n", + "R1=100.0; #Resistor R1, kilo ohm\n", + "R2=22.0; #Resistor R2, kilo ohm\n", + "R3=22.0; #Resistor R3, kilo ohm\n", + "R4=4.7; #Resistor R4, kilo ohm\n", + "R5=10.0; #Resistor R5, kilo ohm\n", + "R6=10.0; #Resistor R6, kilo ohm\n", + "beta=125; #Base current amplification factor\n", + "V_BE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "#(i) D.C voltages\n", + "#For 1st stage:\n", + "V_B1=VCC*R2/(R1+R2); #Voltage at the base of 1st transistor, V (Voltage across R2, using voltage divider rule)\n", + "V_E1=V_B1-V_BE; #Emitter voltage of the 1st transistor, V\n", + "I_E1=round(V_E1/R4,2); #Emitter current of 1st transistor, mA (OHM's LAW)\n", + "I_C1=I_E1; #Collector current of 1st transistor, mA(approximately equals to emitter current)\n", + "V_C1=VCC-I_C1*R3; #Collector voltage of 1st transistor, V\n", + "\n", + "#For 2nd stage:\n", + "V_B2=V_C1; #Voltage at the base of 2nd transistor, V (equals to collector voltage of 1st transistor)\n", + "V_E2=V_C1-V_BE; #Emitter voltage of the 2nd transistor, V\n", + "I_E2=V_E2/R6; #Emitter current of 2nd transistor, mA (OHM's LAW)\n", + "I_C2=I_E2; #Collector current 2nd transistor, mA(approximately equals to emitter current)\n", + "V_C2=VCC-I_C2*R5; #Collector voltage of 2nd transistor, V\n", + "\n", + "print(\"(i) D.C voltages\");\n", + "print(\"First stage: VB1=%.2fV , VE1=%.2fV and VC1=%.2fV\"%(V_B1,V_E1,V_C1));\n", + "print(\"First stage: VB2=%.2fV , VE2=%.2fV and VC2=%.2fV\"%(V_B2,V_E2,V_C2));\n", + "\n", + "#(ii)Voltage gain\n", + "#First stage\n", + "re_1=25/I_E1; #a.c emitter resistance of 1st transistor, ohm\n", + "re_2=25/I_E2; #a.c emitter resistance of 2nd transistor, ohm\n", + "Zin_2nd_stage=beta*re_2/1000; #Input impedance of 2nd stage, kilo ohm\n", + "R_AC=R3*Zin_2nd_stage/(R3+Zin_2nd_stage); #Total a.c collector load, kilo ohm\n", + "A_v1=round(R_AC*1000/re_1,0); #Voltage gain of first stage\n", + "\n", + "print(\"The voltage gain of first stage=%d.\"%A_v1);\n", + "\n", + "#Second stage\n", + "R_AC=R5; #Total a.c collector load for 2nd stage, kilo ohm(Due to no loading effect, equal to R5)\n", + "A_v2=round(R5*1000/re_2,0); #Voltage gain of 2nd stage\n", + "\n", + "print(\"The voltage gain of second stage=%d.\"%A_v2);\n", + "\n", + "A_vT=A_v1*A_v2; #Overall voltage gain\n", + "\n", + "print(\"Overall voltage gain=%d.\"%A_vT);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) D.C voltages\n", + "First stage: VB1=2.16V , VE1=1.46V and VC1=5.18V\n", + "First stage: VB2=5.18V , VE2=4.48V and VC2=7.52V\n", + "The voltage gain of first stage=66.\n", + "The voltage gain of second stage=179.\n", + "Overall voltage gain=11814.\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter12_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter12_1.ipynb new file mode 100644 index 00000000..05e3d9d8 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter12_1.ipynb @@ -0,0 +1,968 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:1e9209171152811793fc18d1ee8c80ddcef574d69421ec87eeaa8fb87a304f6d" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 12: TRANSISTOR AUDIO POWER AMPLIFIERS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.1 : Page number 308\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "R1=10.0; #Resistor R1, kilo ohm\n", + "R2=2.2; #Resistor R2, kilo ohm\n", + "RC=3.6; #Collector resistor, kilo ohm\n", + "RE=1.1; #Emitter resistor, kilo ohm\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "I1=VCC/(R1+R2); #Current through R1 and R2, mA (OHM's LAW)\n", + "V2=I1*R2; #Voltage across R2 resistor, V (OHM's LAW)\n", + "VE=V2-VBE; #Emitter voltage, V\n", + "IE=VE/RE; #Emitter current, mA (OHM's LAW)\n", + "IC=IE; #Collector current, mA (approximately equal to emitter current)\n", + "I_T=I1+IC; #Total current drawn from the supply, mA\n", + "P_dc=VCC*I_T; #Total power drawn from the supply, mW\n", + "\n", + "\n", + "#Results\n", + "print(\"The total power drawn from the supply=%.1fmW.\"%P_dc);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The total power drawn from the supply=18.2mW.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.2 : Page number 309\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_L=10.6; #Voltage across load, V.(from a.c voltmeter, therfore r.m.s value)\n", + "R_L=200.0; #Load resistance, ohm\n", + "\n", + "#Calculation\n", + "#Since, power =V**2/R,\n", + "P_O=(V_L**2/R_L)*1000; #A.C output power, mW\n", + "\n", + "#Result\n", + "print(\"The a.c output power = %.1fmW.\"%P_O);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The a.c output power = 561.8mW.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.3 : Page number 309\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RL=100.0; #Load resistance, ohm\n", + "V_PP=18.0; #Peak-to-peak a.c voltage, V\n", + "\n", + "#Calculation\n", + "#Since, V(r.m.s)=(V(peak-to-peak)/2)/sqrt(2)\n", + "VL=V_PP/(2*(2**0.5)); #r.m.s value, V\n", + "\n", + "#Since, power=(square of voltage)/resistance\n", + "P_O_max=(VL**2/RL)*1000; #Maximum possible a.c load power, mW\n", + "\n", + "#Result\n", + "print(\"The maximum possible a.c load power=%dmW.\"%P_O_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum possible a.c load power=405mW.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.4 : Page number 310\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_battery=12.0; #Battery voltage, V\n", + "P_out=2.0; #Output power, W\n", + "\n", + "#Calculation\n", + "#Since, Power=Current*Voltage\n", + "IC=(P_out/V_battery)*1000; #Maximum collector current , mA\n", + "\n", + "#Result\n", + "print(\"The maximum collector current=%.1fmA.\"%IC);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum collector current=166.7mA.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.5 : Page number 310\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_battery=12.0; #Battery voltage, V\n", + "RL=4.0; #Collector load, kilo ohm\n", + "\n", + "#Calculation\n", + "IC_max=V_battery/RL; #Maximum collector current, mA\n", + "\n", + "\n", + "#Result\n", + "print(\"The maximum collector current=%dmA.\"%IC_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum collector current=3mA.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.6 : Page number 310-311\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "P=50.0; #Power supplied by power amplifier, W\n", + "R=8.0; #Resistance of speaker, ohm\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#Since, Power=Voltage _square/Resistance,\n", + "V=(P*R)**0.5; #a.c output voltage, V\n", + "\n", + "#(ii)\n", + "I=V/R; #a.c output current, A (OHM's LAW)\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The a.c output voltage=%dV.\"%V);\n", + "print(\"(ii) The a.c output current=%.1fA.\"%I);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The a.c output voltage=20V.\n", + "(ii) The a.c output current=2.5A.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.7 : Page number 315\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage, V\n", + "ib_peak=10.0; #Base current(peak), mA\n", + "RB=1.0; #Base resistance, kilo ohm\n", + "RC=20.0; #Collector resistance, ohm\n", + "beta=25.0; #Base current amplification factor\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "IB=round(VCC-VBE/RB,1); #Base current, mA (OHM's LAW)\n", + "IC=int(beta*IB); #Collector current, mA\n", + "VCE=VCC-(IC/1000)*RC; #Collector emitter voltage, V (KVL)\n", + "\n", + "#(i)\n", + "ic_peak=beta*ib_peak; #Collector current(peak), mA\n", + "P_o_ac=(ic_peak/1000)**2*RC/2; #Output power, W\n", + "\n", + "#(ii)\n", + "P_dc=VCC*IC/1000; #Input power, W\n", + "\n", + "#(iii)\n", + "collector_efficiency=(P_o_ac/P_dc)*100; #Collector efficiency of the amplifier circuit,\n", + "\n", + "#Result\n", + "print(\"(i) The output power=%.3fW.\"%P_o_ac);\n", + "print(\"(ii) The input power=%.1fW.\"%P_dc);\n", + "print(\"(iii) The collector efficiency=%.1f%%.\"%collector_efficiency);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The output power=0.625W.\n", + "(ii) The input power=9.6W.\n", + "(iii) The collector efficiency=6.5%.\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.8 : Page number 317\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "P_dc=10.0; #zero signal power dissipation, W\n", + "P_o=4.0; #a.c output power, W\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Collector_eff=(P_o/P_dc)*100; #collector efficiency\n", + "\n", + "#(ii)\n", + "#Zero signal power is the maximum power dissipation in a transistor, therefore,\n", + "Power_rating=P_dc; #Power rating of the transistor, W\n", + "\n", + "#Result\n", + "print(\"(i) The collector efficiency=%d%%.\"%Collector_eff);\n", + "print(\"(i) The power rating of the transistor=%dW.\"%Power_rating);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The collector efficiency=40%.\n", + "(i) The power rating of the transistor=10W.\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.9 : Page number 317-318\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RL=100.0; #Secondary load, ohm\n", + "n=10.0; #Transformer turn ratio\n", + "IC=100.0; #Zero signal collector current, mA\n", + "\n", + "#Calculation\n", + "RL_reflected=n**2*RL; #Reflected load as seen by the primary of the transformer, ohm\n", + "P_o_ac_max=(IC/1000)**2*RL_reflected/2; #Maximum a.c power output, W \n", + "\n", + "\n", + "\n", + "#Result\n", + "print(\"The maximum a.c power output=%dW.\"%P_o_ac_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum a.c power output=50W.\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.10 : Page number 318\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=5.0; #Collector supply voltage, V\n", + "IC=50.0; #Zero signal collector current, mA\n", + "\n", + "#Calculation\n", + "#(i)\n", + "P_o_max=VCC*IC/2; #Maximum a.c output power, mW\n", + "\n", + "#(ii)\n", + "P_dc=VCC*IC; #D.C input power, mW\n", + "#Since, maximum power is dissipated in the zero signal conditions\n", + "Power_rating=P_dc; #Power rating of transistor, mW\n", + "\n", + "#(iii)\n", + "Max_collector_eff=(P_o_max/P_dc)*100; #Maximum collector efficiency\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The maximum a.c output power=%dmW\"%P_o_max);\n", + "print(\"(ii) The power rating of the transistor=%dmW.\"%Power_rating);\n", + "print(\"(iii) The maximum collector efficiency =%d%%.\"%Max_collector_eff);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The maximum a.c output power=125mW\n", + "(ii) The power rating of the transistor=250mW.\n", + "(iii) The maximum collector efficiency =50%.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.11 : Page number 318\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "ic_max=160.0; #Maximum a.c collector current, mA\n", + "ic_min=10.0; #Minimum a.c collector current, mA\n", + "vce_max=12.0; #Maximum collector-emitter voltage, V\n", + "vce_min=2.0; #Minimum collector-emitter voltage, V\n", + "\n", + "#Calculation\n", + "vce_pp=vce_max-vce_min; #peak to peak collector emitter voltage, V\n", + "ic_pp=ic_max-ic_min; #peak to peak collector current, V\n", + "P_o=(vce_pp/(2*sqrt(2)))*(ic_pp/(2*sqrt(2))); #a.c output power, mW\n", + "\n", + "\n", + "#Result\n", + "print(\"The a.c output power=%.1fmW.\"%P_o);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The a.c output power=187.5mW.\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.12 : Page number 319-320\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt \n", + "\n", + "#Variable declaration\n", + "VCC=12.0; #Battey voltage, V\n", + "IC_max_change=100.0; #maximum collector current change, mA\n", + "RL=5.0; #Loudspeaker resistance, ohm\n", + "\n", + "#Calculation\n", + "VCE_max_change=VCC; #Maximum collector-emitter voltage change\n", + "#(i) Loud speaker directly connected in the collector\n", + "Vmax_speaker=(IC_max_change/1000)*RL; #Maximum voltage across the loudspeaker, V\n", + "P_speaker_directly_coupled=Vmax_speaker*IC_max_change; #Power developed in the loudspeaker,mW\n", + "\n", + "#(ii) Loudspeaker transformer coupled\n", + "Z_out=(VCE_max_change/IC_max_change)*1000; #Output impedance of transistor, ohm\n", + "\n", + "#For max power transfer, primary impedance should be Z_out\n", + "RL_reflected=Z_out; #Load resistance as seen by primary, ohm\n", + "n=sqrt(RL_reflected/RL); #Turns ratio of transformer\n", + "Vp=VCC; #Transformer primary voltage, V\n", + "Vs=Vp/n; #Transformer secondary voltage, V\n", + "IL=Vs/RL; #Load current, A\n", + "P_speaker_transformer_coupled=IL**2*RL*1000; #Power delivered to the speaker, mW\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The power transferred to the speaker when directly coupled=%dmW.\"%P_speaker_directly_coupled);\n", + "print(\"(ii) The power trasnferred to the speaker when transformer-coupled=%dmW.\"%P_speaker_transformer_coupled);\n", + "print(\" The turns ratio=%.1f.\"%n);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The power transferred to the speaker when directly coupled=50mW.\n", + "(ii) The power trasnferred to the speaker when transformer-coupled=1200mW.\n", + " The turns ratio=4.9.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.13 : Page number 320-321\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "beta=100.0; #Base current amplification factor\n", + "RL=81.6; #Load resistance, ohm\n", + "VCE_peak=30.0; #Peak value of collector voltage, V\n", + "IC_peak=35.0; #Peak value of collector current, mA\n", + "VCE_min=5.0; #Minimum value of collector voltage, V\n", + "IC_min=1.0; #Minimum value of collector current, mA\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IC_zero_signal=(IC_peak-IC_min)/2 +1; #Zero signal collector current, mA\n", + "\n", + "#(ii)\n", + "IB_zero_signal=IC_zero_signal/beta; #Zero signal base current, mA\n", + "\n", + "#(iii)\n", + "VCE_zero_signal=(VCE_peak-VCE_min)/2 +5; #Zero signal collector-emitter voltage, V\n", + "VCC=VCE_zero_signal; #Collector supply voltage,V (due to transformer coupling, aproximately equal to zero signal VCE)\n", + "P_dc=VCC*IC_zero_signal; #d.c input power, mW\n", + "VCE_ac=(VCE_peak-VCE_min)/(2*sqrt(2)); #a.c output voltage, V\n", + "IC_ac=(IC_peak-IC_min)/(2*sqrt(2)); #a.c output current, mA\n", + "P_ac=VCE_ac*IC_ac; #a.c output power, mW\n", + "\n", + "#(iv)\n", + "collector_eff=(P_ac/P_dc)*100; #Collector efficiency\n", + "\n", + "#(v)\n", + "#a.c resistance RL'=negative inverse of slope of the d.c load line\n", + "slope=(IC_peak-IC_min)/(VCE_min-VCE_peak); #Slope of he d.c load line, kilo mho\n", + "RL_ac=-(1/slope)*1000; #a.c resistance, ohm\n", + "n=sqrt(RL_ac/RL); #Transformer turn ratio\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The approximate value of zero signal collector current=%dmA.\"%IC_zero_signal);\n", + "print(\"(ii) The zero signal base current=%.2fmA.\"%IB_zero_signal);\n", + "print(\"(iii) The d.c input power= %dmW and a.c output power =%dmW.\"%(P_dc,P_ac));\n", + "print(\"(iv) The collector efficiency=%.1f%%.\"%collector_eff);\n", + "print(\"(v) The turn ratio of the transformer=%d.\"%n);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The approximate value of zero signal collector current=18mA.\n", + "(ii) The zero signal base current=0.18mA.\n", + "(iii) The d.c input power= 315mW and a.c output power =106mW.\n", + "(iv) The collector efficiency=33.7%.\n", + "(v) The turn ratio of the transformer=3.\n" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.14 : Page number 321-322\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "RL=13.0; #Load resistance, ohm\n", + "RL_reflected=325.0; #Load resistance, when referred to primary, ohm\n", + "VCC=20.0; #Supply voltage, V\n", + "IC=58.0; #Quiscent value of collector current, mA\n", + "\n", + "#Calculation\n", + "#(i)\n", + "n=sqrt(RL_reflected/RL); #Transformer turn ratio\n", + "\n", + "#(ii)\n", + "P_ac=(((IC/1000)**2)*RL_reflected/2)*1000; #A.C output power, mW\n", + "\n", + "#(iii)\n", + "P_dc=VCC*IC; #d.c input power, mW\n", + "collector_eff=(P_ac/P_dc)*100; #Collector efficiency\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) Transformer turn ratio=%d.\"%n);\n", + "print(\"(ii) The a.c output power=%dmW.\"%P_ac);\n", + "print(\"(iii) The collector efficiency=%d%%.\"%collector_eff);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Transformer turn ratio=5.\n", + "(ii) The a.c output power=546mW.\n", + "(iii) The collector efficiency=47%.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.15 : Page number 323\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "P_total=4.0; #Total power dissipated by the power transistor, W\n", + "T_j_max=90.0; #Maximum junction temperature, degree celsius\n", + "theta=10.0; #Thermal resistance, degree celsius per watt\n", + "\n", + "#Calculation\n", + "#Since, Total power dissipation=half of(max. junc. temp. - ambient temp.)\n", + "T_amb=T_j_max-(P_total*theta); #Ambient temperature, degree celsius\n", + "\n", + "#Result\n", + "print(\"The ambient temperature=%d degree celsius.\"%T_amb);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The ambient temperature=50 degree celsius.\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.16 : Page number 323-324\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "theta=300.0; #Thermal resistance, degree celsius per watt\n", + "T_j_max=90.0; #Maximum junction temperature, degree celsius\n", + "T_amb=30.0; #Ambient temperature, degree celsius\n", + "\n", + "#Calculation\n", + "#(i) Without heat sink\n", + "P_total=((T_j_max-T_amb)/theta)*1000; #Maximum permissible power dissipation without sink, mW\n", + "\n", + "print(\"(i)The maximum permissible power dissipation without heat sink=%dmW.\"%P_total);\n", + "\n", + "#(ii) With heat sink\n", + "theta=60.0; #reduced thermal resistance, degree celsius per watt\n", + "P_total=((T_j_max-T_amb)/theta)*1000; #Maximum permissible power dissipation with heat sink, mW\n", + "\n", + "print(\"(ii)The maximum permissible power dissipation with heat sink=%dmW.\"%P_total);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)The maximum permissible power dissipation without heat sink=200mW.\n", + "(ii)The maximum permissible power dissipation with heat sink=1000mW.\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.17 : Page number 324\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "theta=20.0; #Thermal resistance, degree celsius per watt\n", + "T_j_max=200.0; #Maximum junction temperature, degree celsius\n", + "T_amb=25.0; #Ambient temperature, degree celsius\n", + "VCE=4.0; #Collector-emitter voltage, V\n", + "\n", + "#Calculation\n", + "P_total=(T_j_max-T_amb)/theta; #Maximum permissible power dissipation, W\n", + "\n", + "#since, the max. power dissipation=VCE_max*IC_max,therefore\n", + "IC_max=P_total/VCE; #Maximum collector current, A\n", + "\n", + "print(\"The maximum collector current that the transistor can carry without destruction=%.2fA.\"%IC_max);\n", + "\n", + "#The ambient temperature rises\n", + "T_amb=75.0; #The risen ambibent temperature, degree celsius\n", + "P_total=(T_j_max-T_amb)/theta; #Maximum permissible power dissipation, W\n", + "IC_max=P_total/VCE; #Maximum collector current, A\n", + "\n", + "print(\"The maximum collector current for the risen ambient temperature=%.2fA.\"%IC_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum collector current that the transistor can carry without destruction=2.19A.\n", + "The maximum collector current for the risen ambient temperature=1.56A.\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.18 : Page number 328-329\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "VCC=12.0; #Supply voltage, V\n", + "RL=8.0; #Driving load, ohm\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IC_sat=VCC/(2*RL); #Collector saturation current, A\n", + "P_o_max=round(VCC*IC_sat*0.25,2); #Maximum load power, W\n", + "\n", + "#(ii)\n", + "P_dc=round(VCC*IC_sat/round(pi,2),2); #d.c input power, W\n", + "\n", + "#(iii)\n", + "Collector_eff=(P_o_max/P_dc)*100; #Collector efficiency\n", + "\n", + "#Result\n", + "print(\"(i) The maximum load power =%.2fW.\"%P_o_max);\n", + "print(\"(ii) The d.c input power=%.2fW.\"%P_dc);\n", + "print(\"(iii) The collector efficiency=%.1f%%.\"%Collector_eff);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The maximum load power =2.25W.\n", + "(ii) The d.c input power=2.87W.\n", + "(iii) The collector efficiency=78.4%.\n" + ] + } + ], + "prompt_number": 30 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.19 : Page number 329\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "P_T=10.0; #Power rating of each transistor, W\n", + "max_eff=0.785; #Maximum collector effciency\n", + "\n", + "#Calculation\n", + "#Since, input power=max. a.c power + Power rating of transistor\n", + "#And, max. efficiency=max. a.c power/input d.c power\n", + "P_2T=2*P_T; #Total power dissipation by two transistors\n", + "P_o_max=(max_eff*P_2T)/(1-max_eff); #Maximum output a.c power, W\n", + "\n", + "#result\n", + "print(\"The maximum output power that can be obtained=%.2fW.\"%P_o_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum output power that can be obtained=73.02W.\n" + ] + } + ], + "prompt_number": 31 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.20 : Page number 329\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "eff=60.0/100; #Efficiency of the amplifier\n", + "P_T=2.5; #Power dissipated by each transistor, W\n", + "\n", + "#Calculation\n", + "#Since, input power=max. a.c power + Power rating of transistor\n", + "#And, max. efficiency=max. a.c power/input d.c power\n", + "P_2T=2*P_T; #Total power dissipated by both transistors, W\n", + "P_ac=(eff*P_2T)/(1-eff); #Output a.c power, W\n", + "P_dc=P_ac+P_2T; #Input d.c power, W\n", + "\n", + "#Result\n", + "print(\"The a.c output power= %.1fW.\"%P_ac);\n", + "print(\"The d.c input power= %.1fW.\"%P_dc);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The a.c output power= 7.5W.\n", + "The d.c input power= 12.5W.\n" + ] + } + ], + "prompt_number": 32 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 12.21 : Page number 329-330\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Supply voltage, V\n", + "RL=10.0; #Load resistance, ohm\n", + "\n", + "#Calculation\n", + "IC_sat=(VCC/(2*RL))*1000; #Saturated collector current, mA\n", + "VCE_off=VCC/2; #Collector-emitter voltage in off state, V\n", + "\n", + "#Result\n", + "print(\"1st end point of a.c load line, IC(sat)=%dmA.\"%IC_sat);\n", + "print(\"2nd end point of a.c load line, VCE(off)=%dV.\"%VCE_off);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "1st end point of a.c load line, IC(sat)=500mA.\n", + "2nd end point of a.c load line, VCE(off)=5V.\n" + ] + } + ], + "prompt_number": 33 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter13_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter13_1.ipynb new file mode 100644 index 00000000..8c036515 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter13_1.ipynb @@ -0,0 +1,1147 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:950272de386b8a006089886b37042be2cbcff413c494ad9f74eae7a1268e49ba" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 13: AMPLIFIERS WITH NEGATIVE FEEDBACK" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.1 : Page number 338\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=3000.0; #Voltage gain without feedback\n", + "m_v=0.01; #Feedback fraction\n", + "\n", + "#Calculation\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Avf=Av/(1+Av*m_v); #Voltage gain of the amplifier with negative feedback\n", + "\n", + "#Result\n", + "print(\"The voltage gain of the amplifier with negative feedback=%.0f.\"%Avf);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain of the amplifier with negative feedback=97.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.2 : Page number 339\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=140.0; #Voltage gain\n", + "Avf=17.5; #Voltage gain with negative feedback\n", + "\n", + "#Calculation\n", + "#Since, Avf=Av/(1+Av*mv), so,\n", + "mv=(Av-Avf)/(Av*Avf); #Fraction of output fedback to the input\n", + "\n", + "\n", + "#Result\n", + "print(\"The fraction of output fedback to the input=1/%.0f.\"%(1.0/mv));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The fraction of output fedback to the input=1/20.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.3 : Page number 339\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=100.0; #Voltage gain\n", + "Avf=50.0; #Voltage gain with negative feedback\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "mv=(Av-Avf)/(Av*Avf); #The fraction of output fedback to input\n", + "\n", + "#(ii) Overall gain is to be 75:\n", + "Avf=75.0; #The required overall gain\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Av=Avf/(1-Avf*mv); #The required value of amplifier gain\n", + "\n", + "#result\n", + "print(\"(i) The fraction of output fedback to input=%.2f.\"%mv);\n", + "print(\"(ii) The required amplifier gain for overall gain to be 75=%d.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The fraction of output fedback to input=0.01.\n", + "(ii) The required amplifier gain for overall gain to be 75=300.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.4 : Page number 339-340\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vout=10.0; #output voltage , V\n", + "Vin_f=0.5; #Input votage for amplifier with feedback, V\n", + "Vin=0.25; #Input votage for amplifier without feedback, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Av=Vout/Vin; #Voltage gain without negative feedback\n", + "\n", + "#(ii)\n", + "Avf=Vout/Vin_f; #Voltage gain with negative feedback\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "mv=(Av-Avf)/(Av*Avf); #Feedback fraction\n", + "\n", + "#Result\n", + "print(\"(i) The voltage gain without feedback=%d.\"%Av);\n", + "print(\"(ii) The feedback fraction = 1/%d.\"%(1/mv));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The voltage gain without feedback=40.\n", + "(ii) The feedback fraction = 1/40.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.5 : Page number 340\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=50.0; #Gain without feedback\n", + "Avf=25.0; #Gain with negative feedback\n", + "\n", + "#Calculation\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "mv=(Av-Avf)/(Av*Avf); #Feedback fraction\n", + "\n", + "#(i)\n", + "#percentage of reduction without feedback\n", + "Av_reduced=40.0; #Reduced amplifier gain due to ageing\n", + "percentage_of_reduction=((Av-Av_reduced)/Av)*100; #Percentage of reduction in stage gain\n", + "\n", + "print(\"(i) The percentage of reduction in stage gain without feedback=%d%%.\"%percentage_of_reduction);\n", + "\n", + "#(ii)\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Avf_reduced=round(Av_reduced/(1+mv*Av_reduced),1); #Reduced net gain with negative feedback \n", + "percentage_of_reduction_f=((Avf-Avf_reduced)/Avf)*100; #Percentage of reduction in net gain with feedback\n", + "\n", + "print(\"(ii) The percentage of reduction in net gain with feedback=%.1f%%\"%percentage_of_reduction_f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The percentage of reduction in stage gain without feedback=20%.\n", + "(ii) The percentage of reduction in net gain with feedback=11.2%\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.6 : Page number 340\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=100.0; #Gain\n", + "mv=0.1; #feedback fraction\n", + "Av_fall=6.0; #fall in gain, dB\n", + "\n", + "#Calculation\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Avf=round(Av/(1+Av*mv),2); #Total system gain with feedback\n", + "\n", + "#Since, fall in gain=20*log10(Av/Av_1)\n", + "Av1=round(Av/10**(Av_fall/20),0); #New absolute voltage gain without feedback\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Avf_new=round(Av1/(1+Av1*mv),2); #New net system gain with feedback\n", + "\n", + "percentage_change=((Avf-Avf_new)/Avf)*100; #Percentage change in system gain\n", + "\n", + "#Result\n", + "print(\"The percentage change in system gain=%.2f%%\"%percentage_change);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The percentage change in system gain=8.36%\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.7 : Page number 341\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=500.0; #Voltage gain without feedback\n", + "Avf=100.0; #Voltage gain with negative feedback\n", + "Av_fall_percentage=20.0; #Gain fall percentage due to ageing\n", + "\n", + "\n", + "#Calculation\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "mv=(Av-Avf)/(Av*Avf); #Feedback fraction\n", + "Av_reduced=((100-Av_fall_percentage)/100)*Av; #Reduced voltage gain\n", + "Avf_reduced=round(Av_reduced/(1+Av_reduced*mv),1); #Reduced total gain of the system\n", + "percentage_fall=((Avf-Avf_reduced)/Avf)*100; #Percentage of fall in total system gain\n", + "\n", + "#Result\n", + "print(\"The feedback fraction=%.3f.\"%mv);\n", + "print(\"The percentage fall in system gain=%.1f%%.\"%percentage_fall);\n", + "\n", + "#Note: The percentage gain is calculated in the text as 4.7% due to approximation of Avf to 95.3 whose actual approximation will be (95.238)~95.2. So, the percentage fall calculated here is 4.8%\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The feedback fraction=0.008.\n", + "The percentage fall in system gain=4.8%.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.8 : Page number 341\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "Av=100000.0; #Open loop voltage gain\n", + "f_dB=10.0; #Negative feedback, dB\n", + "\n", + "#Calculation\n", + "Av_dB=20*log10(Av); #dB voltage gain without feedback, dB\n", + "Avf_dB=Av_dB-f_dB; #dB voltage gain with feedback, dB\n", + "Avf=10**(Avf_dB/20); #Voltage gain with feedback\n", + "\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "mv=(Av-Avf)/(Av*Avf); #feedback fraction\n", + "\n", + "#Result\n", + "print(\"The voltage gain with feedback=%d.\"%Avf);\n", + "print(\"The feedback fraction=%.2e.\"%mv);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain with feedback=31622.\n", + "The feedback fraction=2.16e-05.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.9 : Page number 341-342\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ao=1000.0; #Open circuit voltage gain\n", + "Rout=100.0; #Output resistance, ohm\n", + "RL=900.0; #Resistive load, ohm\n", + "mv=1/50; #feedback fraction\n", + "\n", + "#Calculation\n", + "#Since, Av=Ao*RL/(Rout+RL)\n", + "Av=Ao*RL/(Rout+RL); #Voltage gain without feedback\n", + "Avf=Av/(1+Av*mv); #Voltage gain with feedback\n", + "\n", + "#Result\n", + "print(\"The voltage gain with feedback=%.1f.\"%Avf);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain with feedback=900.0.\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.10 : Page number 342\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Avf=100.0; #Voltage gain with feedback\n", + "vary_f=1; #Vary percentage in voltage gain with feedback\n", + "vary_wf=20; #Vary percentage in voltage gain without feedback\n", + "\n", + "#Calculation\n", + "#Avf=Av/(1+Av*mv)\n", + "print(\"%d=Av/(1+Av*mv) ------Eq. 1\"%Avf); #Equation 1\n", + "\n", + "#considering variation in gains\n", + "Avf_vary=Avf*(1- vary_f/100.0); #Gain with feedback, considering variation\n", + "print(\"%d=%.1f*Av/(1+%.1f*Av*mv) ------Eq. 2\"%(Avf_vary,(1-vary_wf/100.0),(1-vary_wf/100.0))); #Equation 2\n", + "\n", + "#Solving the above two equations\n", + "print(\"%d + %.1f*Av*mv=%.1fAv ------Eq. 3 from Eq. 2\"%(Avf_vary,Avf_vary*(1-vary_wf/100.0),(1-vary_wf/100.0))); #Equation 3\n", + "\n", + "#multiplying Eq. 1 with (Avf_vary*(1-vary_wf/100.0))/100=0.792\n", + "print(\"%.1f + %.1f*Av*mv=%.3fAv ------Eq. 4 from Eq. 1\"%(Avf*Avf_vary*(1-vary_wf/100.0)/100.0,Avf*Avf_vary*(1-vary_wf/100.0)/100.0,Avf_vary*(1-vary_wf/100.0)/100.0)); #Equation 4\n", + "\n", + "print(\"Subtracting Eq.4 from Eq.3\" );\n", + "print(\"%.1f = %.3f*Av\"%(Avf_vary-Avf*Avf_vary*(1-vary_wf/100.0)/100.0,(1-vary_wf/100.0)-Avf_vary*(1-vary_wf/100.0)/100.0));\n", + "Av=(Avf_vary-Avf*Avf_vary*(1-vary_wf/100.0)/100.0)/((1-vary_wf/100.0)-Avf_vary*(1-vary_wf/100.0)/100.0);\n", + "print(\"Av=%.0f.\"%Av);\n", + "mv=(Av-Avf)/(Av*Avf);\n", + "print(\"mv=%.4f.\"%mv);\n", + " " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "100=Av/(1+Av*mv) ------Eq. 1\n", + "99=0.8*Av/(1+0.8*Av*mv) ------Eq. 2\n", + "99 + 79.2*Av*mv=0.8Av ------Eq. 3 from Eq. 2\n", + "79.2 + 79.2*Av*mv=0.792Av ------Eq. 4 from Eq. 1\n", + "Subtracting Eq.4 from Eq.3\n", + "19.8 = 0.008*Av\n", + "Av=2475.\n", + "mv=0.0096.\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.11 : Page number 345\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=10000.0; #Volage gain without feedback\n", + "R1=2.0; #Resistor R1, kilo ohm\n", + "R2=18.0; #Resistor R2, kilo ohm\n", + "Vin=1.0; #input voltage, mV\n", + "\n", + "#Calculation\n", + "#(i)\n", + "mv=R1/(R1+R2); #feedback fraction\n", + "\n", + "#(ii)\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Avf=round(Av/(1+Av*mv),0); #Voltage gain with feedback\n", + "\n", + "#(iii)\n", + "Vout=Avf*Vin; #Output voltage, mV\n", + "\n", + "#Result\n", + "print(\"(i) Feedback fraction=%.1f.\"%mv);\n", + "print(\"(ii) Voltage gain with feedback=%d.\"%Avf);\n", + "print(\"(iii) Output voltage=%dmV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Feedback fraction=0.1.\n", + "(ii) Voltage gain with feedback=10.\n", + "(iii) Output voltage=10mV.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.12 : Page number 345-346\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=10000.0; #Volateg gain without feedback\n", + "Zin=10.0; #Input impedance, kilo ohm\n", + "Zout=100.0; #Output impedance, ohm\n", + "R1=10.0; #Resistor R1, kilo ohm\n", + "R2=90.0; #Resistor R2, kilo ohm\n", + "\n", + "#Calculation\n", + "#(i)\n", + "mv=R1/(R1+R2); #Feedback fraction\n", + "\n", + "#(ii)\n", + "#Since, Gain_with_feedback= Gain_without_feedback/(1+Gain_without_feedback*feedback_fraction),\n", + "Avf=round(Av/(1+Av*mv),0); #Voltage gain with feedback\n", + "\n", + "#(iii)\n", + "Zin_feedback=((1+Av*mv)*Zin)/1000; #Increased input impedance due to negative feedback, mega ohm\n", + "\n", + "#(iv)\n", + "Zout_feedback=Zout/(1+Av*mv); #Decreased output impedance due to negative feedback, ohm\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) Feedback fraction=%.1f.\"%mv);\n", + "print(\"(ii) The voltage gain with feedback=%d.\"%Avf);\n", + "print(\"(iii) Increased input impedance due to negative feedback=%.0f mega ohm\"%Zin_feedback);\n", + "print(\"(iv) Decreased output impedance due to negative feedback=%.1f ohm.\"%Zout_feedback);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Feedback fraction=0.1.\n", + "(ii) The voltage gain with feedback=10.\n", + "(iii) Increased input impedance due to negative feedback=10 mega ohm\n", + "(iv) Decreased output impedance due to negative feedback=0.1 ohm.\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.13 : Page number 346\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=150.0; #Voltage gain\n", + "D=5/100.0; #Distortion\n", + "mv=10/100.0; #Feedback fraction\n", + "\n", + "#Calculation\n", + "Dvf=round((D/(1+Av*mv))*100,3); #Distortion with negative feedback\n", + "\n", + "\n", + "#Result\n", + "print(\"Distortion with negative feedback=%.3f%%\"%Dvf);\n", + "\n", + "#Note: In the text, value of Dvf=0.3125% has been approximated to 0.313%. But, here the approximation is done to 0.312%\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Distortion with negative feedback=0.313%\n" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.14 : Page number 346\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Av=1000.0; #Voltage gain\n", + "f1=1.5; #Lower cut-off frequency, kHz\n", + "f2=501.5; #Upper cut-off frequency, kHz\n", + "mv=1/100.0; #Feedbcack fraction\n", + "\n", + "#Calculation\n", + "f1_f=(f1/(1+mv*Av))*1000; #New lower cut-off frequency, Hz\n", + "f2_f=(f2*(1+mv*Av))/1000; #New upper cut-off frequency, MHz\n", + "\n", + "\n", + "#Result\n", + "print(\"The new lower cut-off frequency=%.1fHz\"%f1_f);\n", + "print(\"The new upper cut-off frequency=%.2fMHz\"%f2_f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The new lower cut-off frequency=136.4Hz\n", + "The new upper cut-off frequency=5.52MHz\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.15 : Page number 348\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ai=200.0; #Current gain without feedback\n", + "mi=0.012; #Current attenuation\n", + "\n", + "#Calculation\n", + "Aif=Ai/(1+Ai*mi);\n", + "\n", + "#Result\n", + "print(\"The effective current gain=%.2f.\"%Aif);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The effective current gain=58.82.\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.16 : Page number 349\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ai=240.0; #Current gain\n", + "Zin=15.0; #Input impedance without feedback, kilo ohm\n", + "mi=0.015; #Current feedback fraction\n", + "\n", + "#Calculations\n", + "Zin_f=Zin/(1+mi*Ai); #Input impedance with feedback, kilo ohm\n", + "\n", + "\n", + "#Result\n", + "print(\"The input impedance when negative feedback is applied=%.2f kilo ohm\"%Zin_f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The input impedance when negative feedback is applied=3.26 kilo ohm\n" + ] + } + ], + "prompt_number": 30 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.17 : Page number 349\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ai=200.0; #Current gain without feedback\n", + "Zout=3.0; #Output impedance without feedback, kilo ohm\n", + "mi=0.01; #current feedback fraction\n", + "\n", + "#Calculation\n", + "Zout_f=Zout*(1+mi*Ai); #Output impedance with negative feedback, kilo ohm\n", + "\n", + "#Result\n", + "print(\"The output impedance with negative feedback=%dkilo ohm.\"%Zout_f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output impedance with negative feedback=9kilo ohm.\n" + ] + } + ], + "prompt_number": 31 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.18 : Page number 349\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ai=250.0; #Current gain without feedback\n", + "BW=400.0; #Bandwidth, kHz\n", + "mi=0.01; #current feedback fraction\n", + "\n", + "#Calculation\n", + "BW_f=BW*(1+mi*Ai); #Bandwidth when negative feedback is applied, kHz\n", + "\n", + "#Result\n", + "print(\"Bandwidth when negative feedback is applied=%dkHz.\"%BW_f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Bandwidth when negative feedback is applied=1400kHz.\n" + ] + } + ], + "prompt_number": 32 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.19 : Page number 350-351\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "VCC=18.0; #Supply voltage, V\n", + "R1=16.0; #Resistor R1, kilo ohm\n", + "R2=22.0; #Resistor R2, kilo ohm\n", + "RE=910.0; #Emitter resistor, ohm\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculations\n", + "V2=VCC*R2/(R1+R2); #Voltage across R2, V (Voltage divider rule)\n", + "VE=V2-VBE; #Emitter voltage, V\n", + "IE=(VE/RE)*1000; #Emitter current, mA (OHM's LAW)\n", + "\n", + "#D.C load line\n", + "IC_sat=(VCC/RE)*1000; #Collector saturation current, mA\n", + "VCE_off=VCC; #Collector-emitter voltage in off state, V\n", + "\n", + "#Result\n", + "print(\"Value of VE=%.2fV and IE=%.2fmA\"%(VE,IE));\n", + "\n", + "#Plotting\n", + "VCE_plot=[0,VCE_off]; #Plotting variable for VCE\n", + "IC_plot=[IC_sat,0]; #Plotting variable for IC\n", + "p=plot(VCE_plot,IC_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,20])\n", + "limit.set_ylim([0,25])\n", + "xlabel('VCE(V)');\n", + "ylabel('IC(mA)');\n", + "title('d.c load line');\n", + "plt.grid();\n", + "show(p);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of VE=9.72V and IE=10.68mA\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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E8Vwu6NfPtIgaNoTYWHj6aTh92u7IxBdK2/XCW7ZsoVatWhw9epQuXbrQuHFj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\nVARERBzs/wEyuwnCdMXkIQAAAABJRU5ErkJggg==\n", + "text": [ + "<matplotlib.figure.Figure at 0x7f109441f290>" + ] + } + ], + "prompt_number": 39 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.20 : Page number 352\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Supply voltage, V\n", + "R1=10.0; #Resistor R1, kilo ohm\n", + "R2=10.0; #Resistor R2, kilo ohm\n", + "RE=5.0; #Emitter resistance, kilo ohm\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "V2=VCC*R2/(R1+R2); #Voltage across R2, V (Voltage divider rule)\n", + "VE=V2-VBE; #Emitter voltage, V\n", + "IE=(VE/RE); #Emitter current, mA (OHM's LAW)\n", + "re=25/IE; #a.c emitter resistance, ohm\n", + "Av=RE*1000/(re+RE*1000); #Voltage gain\n", + "\n", + "\n", + "#Result\n", + "print(\"The voltage gain of the emitter follower circuit=%.3f.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain of the emitter follower circuit=0.994.\n" + ] + } + ], + "prompt_number": 33 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.21 : Page number 352-353\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RE=5.0; #Emitter resistance, kilo ohm\n", + "re=29.1; #a.c emitter resistance, ohm\n", + "RL=5.0; #Load resistance, kilo ohm\n", + "\n", + "#Calculation\n", + "RE_ac=(RE*RL)/(RE+RL); #New effective value of emitter resistance, kilo ohm\n", + "Av=RE_ac*1000/(re+RE_ac*1000); #Voltage gain\n", + "\n", + "#Result\n", + "print(\"The voltage gain=%.3f\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain=0.988\n" + ] + } + ], + "prompt_number": 34 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.22 : Page number 354\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "def pr(r1,r2): #Function for calculating parallel resistance\n", + " return (r1*r2)/(r1+r2);\n", + "\n", + "#Variable declaration\n", + "VCC=10.0; #Supply voltage, V\n", + "R1=10.0; #Resistor R1, kilo ohm\n", + "R2=10.0; #Resistor R2, kilo ohm\n", + "RE=4.3; #Emitter resistor, kilo ohm\n", + "RL=10.0; #Load resistance, kilo ohm\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=200.0; #Base current amplification factor\n", + "\n", + "#Calculation\n", + "V2=VCC*R2/(R1+R2); #Voltage across R2, V (Voltage divider rule)\n", + "VE=V2-VBE; #Emitter voltage, V\n", + "IE=(VE/RE); #Emitter current, mA (OHM's LAW)\n", + "re=25/IE; #a.c emitter resistance, ohm\n", + "RE_eff=pr(RE,RL); #Effective external emitter resistance, kilo ohm\n", + "Zin_base=beta*(re/1000+RE_eff); #Input impedance of the base of the transistor, kilo ohm\n", + "Zin=pr(pr(R1,R2),Zin_base); #Input impedance of emitter follower, kilo ohm\n", + "#Approximate value of input impedance taken as parallel resistance of R1 and R2 and ignoring Zin_base due to its relatively large value\n", + "Zin_approx=pr(R1,R2); #Approximate input impedance, kilo ohm\n", + "\n", + "#Result\n", + "print(\"The input impedance of the emitter follower =%.2f kilo ohm\"%Zin);\n", + "print(\"The approximate value of the input impedance=%d kilo ohm\"%Zin_approx);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The input impedance of the emitter follower =4.96 kilo ohm\n", + "The approximate value of the input impedance=5 kilo ohm\n" + ] + } + ], + "prompt_number": 35 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.23 : Page number 355\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "def pr(r1,r2): #Function for calculating parallel resistance\n", + " return (r1*r2)/(r1+r2);\n", + "\n", + "\n", + "#Variable declaration\n", + "re=20.0; #a.c emitter resistance, ohm\n", + "R1=3.0; #Resistor R1, kilo ohm\n", + "R2=4.7; #Resistor R2, kilo ohm\n", + "RS=600.0; #Source resistance, kilo ohm\n", + "beta=200.0; #Base current amplification factor\n", + "\n", + "#Calculation\n", + "Rin_ac=pr(pr(R1,R2)*1000,RS); #Input a.c resistance, ohm\n", + "Zout=re + Rin_ac/beta; #Output impedance, ohm\n", + "\n", + "#Result\n", + "print(\"The output impedance=%.1f ohm\"%Zout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output impedance=22.3 ohm\n" + ] + } + ], + "prompt_number": 36 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.24 : Page number 358\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Supply voltage, V\n", + "R1=120.0; #Resistor R1, kilo ohm\n", + "R2=120.0; #Resistor R2, kilo ohm\n", + "RE=3.3; #Emitter resistor, kilo ohm\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta_1=70.0; #Base current amplification factor of 1st transistor\n", + "beta_2=70.0; #Base current amplification factor of 2nd transistor\n", + "\n", + "#Calculation\n", + "#(i)\n", + "V2=VCC*R2/(R1+R2); #Voltage across R2, V (Voltage divider rule)\n", + "IE_2=(V2-2*VBE)/RE; #Emitter current, mA (OHM's LAW)\n", + "\n", + "#(ii)\n", + "Zin=(beta_1*beta_2*RE)/1000; #Input impedance, mega ohm\n", + "\n", + "#Result\n", + "print(\"(i) d.c value of current in RE=%.2fmA\"%IE_2);\n", + "print(\"(ii) Input impedance=%.2f mega ohm.\"%Zin);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) d.c value of current in RE=1.09mA\n", + "(ii) Input impedance=16.17 mega ohm.\n" + ] + } + ], + "prompt_number": 37 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 13.25 : Page number 358-359\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Supply voltage, V\n", + "R1=20.0; #Resistor R1, kilo ohm\n", + "R2=10.0; #Resistor R2, kilo ohm\n", + "RC=4.0; #Collector resistor, kilo ohm\n", + "RE=2.0; #Emitter resistor, kilo ohm\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=100.0; #Base current amplification factor of 1st transistor\n", + "\n", + "#Calculation\n", + "#(i) D.C Bias levels\n", + "VB1=VCC*R2/(R1+R2); #Base voltage of 1st transistor, V (Voltage divider rule)\n", + "VE1=VB1-VBE; #Emitter voltage of 1st transistor, V\n", + "VB2=VE1; #Base voltage of 2nd transistor, V\n", + "VE2=VB2-VBE; #Emitter voltage of 2nd transistor, V\n", + "IE2=VE2/RE; #Emitter current of 2nd transistor, mA (OHM' LAW)\n", + "IE1=IE2/beta; #Emitter current of 1st transistor, mA (IE~IC=beta*IB, here IB2=IE1)\n", + "\n", + "#(ii) A.C analysis\n", + "re1=25/IE1; #a.c emitter resistance of 1st transistor\n", + "re2=25/IE2; #a.c emitter resistance of 2nd transistor\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) D.C Bias levels: \\n VB1= %dV, VE1=%.1fV, VB2=%.1fV, VE2=%.1fV, IE2=%.1fmA and IE1=%.3fmA.\"%(VB1,VE1,VB2,VE2,IE2,IE1));\n", + "print(\"(ii) A.C Analysis: \\n re1=%d ohm and re2=%.2f ohm \"%(re1,re2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) D.C Bias levels: \n", + " VB1= 4V, VE1=3.3V, VB2=3.3V, VE2=2.6V, IE2=1.3mA and IE1=0.013mA.\n", + "(ii) A.C Analysis: \n", + " re1=1923 ohm and re2=19.23 ohm \n" + ] + } + ], + "prompt_number": 38 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter14_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter14_1.ipynb new file mode 100644 index 00000000..5e35882c --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter14_1.ipynb @@ -0,0 +1,502 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:ec0d27209d08b0b95750f66ce9ee21af5ef586e23d0bf0ea218aa20a4ce63e43" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#CHAPTER 14: SINUSOIDAL OSCILLATORS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.1 : Page number 371-372\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "L1=58.6; #Inductance, micro henry\n", + "C1=300.0; #Capacitance, pF\n", + "\n", + "#Calculation\n", + "f=(1/(2*round(pi,2)*sqrt(L1*10**-6*C1*10**-12)))/1000; #Frequency of oscillation, kHz\n", + "\n", + "\n", + "#Result\n", + "print(\"frequency of oscillation=%dkHz\"%f);\n", + "\n", + "\n", + "#Note : The frequency has been calculated in the text as 1199kHz but here the answer gets approximated to 1200kHz.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "frequency of oscillation=1200kHz\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.2 : Page number 372\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "L1=1.0; #Inductance , mH\n", + "f=1.0; #frequency of oscillation, GHz\n", + "\n", + "#Calculation\n", + "#Since, f=1/(2*pi*sqrt(L1*C1)),\n", + "C1=(1/(L1*10**-3*(f*10**12*2*pi)**2))*10**12; #Capacitance, pF\n", + "\n", + "\n", + "#Result\n", + "print(\"The Capacitance of the capacitor of the LC oscillator=%.2epF\"%C1);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The Capacitance of the capacitor of the LC oscillator=2.53e-11pF\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.3 : Page number 373-374\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "C1=0.001; #Capacitor C1, microfarad\n", + "C2=0.01; #Capacitor C2, microfarad\n", + "L=15.0; #Inductance, microhenry\n", + "\n", + "#Calculation\n", + "CT=C1*C2/(C1+C2); #Total capacitance\n", + "\n", + "#(i) Operating frequency\n", + "f=(1/(2*pi*sqrt(CT*10**-6*L*10**-6)))/1000; #Operating frequency, kHz\n", + "\n", + "#(ii) Feedback fraction\n", + "mv=C1/C2; #Feedback fraction\n", + "\n", + "#Result\n", + "print(\"(i) The operating frequency=%dkHz\"%f);\n", + "print(\"(ii) The feedback fraction=%.1f\"%mv);\n", + "\n", + "#Note : The operating frequency is calculated in the text as 1361kHz but here it has been approximated to 1362kHz\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The operating frequency=1362kHz\n", + "(ii) The feedback fraction=0.1\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.4 : Page number 374: Page number\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "mv=0.25; #Feedback fraction\n", + "L=1.0; #Inductance, mH\n", + "f=1.0; #Operating frequeny, MHz\n", + "\n", + "#Calculation\n", + "#Since, f=1/(2*pi*sqrt(L*C))\n", + "CT=round((1/(L*10**-3*(2*pi*f*10**6)**2))*10**12,1); #Total capacitance, pF\n", + "\n", + "#Since, mv=C1/C2 and CT=C1*C2/(C1+C2) or CT=C2/(1+ (C2/C1)),\n", + "#From the above equations, substituting value of mv and calculaing value of C2,\n", + "C2=CT*(1+(1/mv)); #Capacitance of C2 capactior, pF\n", + "C1=mv*C2; #Capacitance of C1 capacitor, pF\n", + "\n", + "#Result\n", + "print(\"C1=%.1fpF and C2=%.1fpF\"%(C1,C2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "C1=31.6pF and C2=126.5pF\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.5 : Page number 375-376\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable decalaration\n", + "L1=1000.0; #Inductance of L1 inductor, microhenry\n", + "L2=100.0; #Inductance of L2 inductor, microhenry\n", + "M=20.0; #Mutual inductance, microhenry\n", + "C=20.0; #Capacitance, pF\n", + "\n", + "#Calculation\n", + "LT=L1+L2+2*M; #Total inductance, microhenry\n", + "\n", + "#(i) Operating frequency\n", + "f=(1/(2*pi*sqrt(LT*10**-6*C*10**-12)))/1000; #Operating frequency, kHz\n", + "\n", + "#(ii)\n", + "mv=L2/L1; #feedback fraction\n", + "\n", + "#Result\n", + "print(\"(i) The operating frequency=%dkHz.\"%f);\n", + "print(\"(ii) The feedback fraction=%.1f.\"%mv);\n", + "\n", + "#Note : The operating frequecy has been calculated in the text as 1052kHz but here it gets approximated to 1054kHz\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The operating frequency=1054kHz.\n", + "(ii) The feedback fraction=0.1.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.6 : Page number 376\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "C=1.0; #Capacitance, pF\n", + "f=1.0; #Frequency, MHz\n", + "mv=0.2; #Feedback frequency\n", + "\n", + "\n", + "#Calculation\n", + "LT=(1/(C*10**-12*(2*pi*f*10**6)**2))*1000; #Total inductance, mH\n", + "\n", + "#Since, mv=L2/L1 or L2=mv*L1 and L1+L2=LT or L1(1+mv)=LT,\n", + "L1=LT/(1+mv); #Inductance of L1 inductor, mH\n", + "L2=L1*mv; #inductance of L2 inductor, mH\n", + "\n", + "#Result\n", + "print(\"L1=%.1fmH and L2=%.2fmH.\"%(L1,L2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "L1=21.1mH and L2=4.22mH.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.7 : Page number 378\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "R1=1.0; #Resistor R1, mega ohm\n", + "R2=R1; #Resistor R2, mega ohm\n", + "R3=R1; #Resistor R3, mega ohm\n", + "C1=68.0; #Capacitor C1, pF\n", + "C2=C1; #Capacitor C2, pF\n", + "C3=C1; #Capacitor C3, pF\n", + "\n", + "\n", + "#Calculation\n", + "R=R1*10**6; #Resistance of the resistors of phase shift circuit, ohm\n", + "C=C1*10**-12; #Capacitance of the capacitors of phase shift circuit, F\n", + "fo=1/(2*pi*R*C*sqrt(6)); #Frequency of oscillation, Hz\n", + "\n", + "#Result\n", + "print(\"The frequency of oscillation=%dHz\"%fo);\n", + "\n", + "#Note: The frequency of oscillation had been calculated in the text as 954Hz, but here it gets approximated to 955 HZ.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The frequency of oscillation=955Hz\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.8 : Page number 378\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "C=5.0; #Capacitance of the capacitors of phase shift circuit, pF\n", + "fo=800.0; #Required frequency of oscillation, kHz\n", + "\n", + "#Calculation\n", + "#Since, fo=1/(2*pi*R*C*sqrt(6))\n", + "R=(1/(2*pi*C*10**-12*fo*10**3*sqrt(6)))/1000; #Resistance of the resistors of phase shift circuit, kilo ohm\n", + "\n", + "#Result\n", + "print(\"R=%.1f kilo ohm.\"%R);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "R=16.2 kilo ohm.\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.9 : Page number 380\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "#Resistance of R1 and R2 resistors of the R-C bridge circuit\n", + "R1=220.0; #kilo ohm \n", + "R2=220.0; #kilo ohm\n", + "\n", + "#Capacitance of C1 and C2 the capacitors of the R-C bridge circuit\n", + "C1=250.0; #pF\n", + "C2=250.0; #pF\n", + "\n", + "#Calculation\n", + "#Since, R1=R2 and C1=C2, R1=R2 is taken as R and C1=C2 is taken as C\n", + "#And, f=1/(2*pi*sqrt(R1*R2*C1*C2))is transformed to f=1/(2*pi*R*C).\n", + "R=R1*10**3; #kilo ohm\n", + "C=C1*10**-12; #pF\n", + "f=1/(2*pi*R*C); #Frequency of oscillation, Hz\n", + "\n", + "\n", + "#Result\n", + "print(\"The frequency of oscillation=%dHz.\"%f);\n", + "\n", + "\n", + "#Note : The frequency of oscillation is calculated in the text as 2892Hz but here it gets approximated to 2893 Hz.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The frequency of oscillation=2893Hz.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 14.11 : Page number 384\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "#a.c equivalent values of the crystal:\n", + "L=1.0; #Inductance , H\n", + "C=0.01; #Capacitance , pF\n", + "R=1000.0; #Resistance , ohm\n", + "Cm=20.0; #Mounting capacitance, pF\n", + "\n", + "#Calculation\n", + "fs=(1/(2*round(pi,2)*sqrt(L*C*10**-12)))/1000; #Series resonant frrequency, kHz\n", + "CT=(C*Cm/(C+Cm)); #Total capacitance, pF\n", + "fp=(1/(2*round(pi,2)*sqrt(L*CT*10**-12)))/1000; #Prallel resonant frequency, kHz\n", + "\n", + "#Result\n", + "print(\"fs=%.0fkHz and fp=%.0fkHz.\"%(fs,fp));\n", + "\n", + "#Note: fs and fp are calculated in the text as 1589kHz and 1590kHz, but here it gets approximated to 1592kHz and 1593kHz\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "fs=1592kHz and fp=1593kHz.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter15_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter15_1.ipynb new file mode 100644 index 00000000..e649cc91 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter15_1.ipynb @@ -0,0 +1,482 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:034eec32676d4e7abdedfb3bf68426d81a2d1483fc668bcbfdb5be18cec2e406" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 15: TRANSISTOR TUNED AMPLIFIERS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.1 : Page number 394" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "C=250.0*10**-12; #Capacitor of parallel resonant circuit, F\n", + "L=1.25*10**-3; #Inductor of the parallel resonant circuit, H\n", + "R=10.0; #Resistor of the parallel resonant circuit, ohm\n", + "\n", + "#Calculation\n", + "#(i) Resonant frequency\n", + "fr=((1/(2*pi))*sqrt((1/(L*C))-(R/L)**2))/1000; #Resonant frequecy, kHz\n", + "\n", + "#(ii) Impedance of the circuit at resonance\n", + "Zr=(L/(C*R))/1000; #Impedance of the circuit at resonance, kilo ohm\n", + "\n", + "#(iii) Quality factor of the circuit\n", + "Q=2*pi*(fr*10**3)*L/R; #Quality factor of the circuit\n", + "\n", + "#Result\n", + "print(\"(i) The resonant frequency=%.1fkHz.\"%fr);\n", + "print(\"(ii) The impedance of the circuit at resonance=%d kilo ohm.\"%Zr);\n", + "print(\"(iii) The quality factor of the circuit=%.1f.\"%Q);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The resonant frequency=284.7kHz.\n", + "(ii) The impedance of the circuit at resonance=500 kilo ohm.\n", + "(iii) The quality factor of the circuit=223.6.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.2 : Page number 394-395\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "C=100.0*10**-12; #Capacitor of parallel resonant circuit, F\n", + "L=100.0*10**-6; #Inductor of the parallel resonant circuit, H\n", + "R=10.0; #Resistor of the parallel resonant circuit, ohm\n", + "V=10.0; #Supply voltage, V\n", + "\n", + "#Calculation\n", + "#(i) Resonant frequency\n", + "fr=((1/(2*pi))*sqrt((1/(L*C))-(R/L)**2))/1000; #Resonant frequecy, kHz\n", + "\n", + "#(ii) Impedance of the circuit at resonance\n", + "Zr=(L/(C*R))/10**6; #Impedance of the circuit at resonance, mega ohm\n", + "\n", + "I=V/Zr; #Line current at resonance, microampere\n", + "\n", + "#Result\n", + "print(\"(i) The resonant frequency=%.2fkHz.\"%fr);\n", + "print(\"(ii) The impedance of the circuit at resonance=%.1f mega ohm.\"%Zr);\n", + "print(\"The line current at resonance=%d micro ampere.\"%I);\n", + "\n", + "#Note : The resonant frequency in the text has been calculated as 1592.28 kHz, but here it gets approximated to 1591.47 kHz.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The resonant frequency=1591.47kHz.\n", + "(ii) The impedance of the circuit at resonance=0.1 mega ohm.\n", + "The line current at resonance=100 micro ampere.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.3 : Page number 395\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "C=250.0*10**-12; #Capacitor of parallel resonant circuit, F\n", + "Zr=500.0*10**3; #Dynamic impedance, ohm\n", + "R=10.0; #Resistance of the coil, ohm\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#Since,Zr=L/CR,\n", + "L=(Zr*C*R)*10**3; #Inductance of the coil, mH\n", + "\n", + "#(ii) Resonant frequency\n", + "fr=((1/(2*pi))*sqrt((1/(L*10**-3*C))-(R/(L*10**-3))**2))/1000; #Resonant frequecy, kHz\n", + "\n", + "#(iii) Quality factor of the circuit\n", + "Q=2*pi*(fr*10**3)*(L*10**-3)/R; #Quality factor of the circuit\n", + "\n", + "#Result\n", + "print(\"(i) The inductance of the coil=%.2fmH.\"%L);\n", + "print(\"(ii) The resonant frequency=%.1fkHz.\"%fr);\n", + "print(\"(iii) The quality factor of the circuit=%.1f.\"%Q);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The inductance of the coil=1.25mH.\n", + "(ii) The resonant frequency=284.7kHz.\n", + "(iii) The quality factor of the circuit=223.6.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.4 : Page number 397\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Q=60.0; #Quality factor of the tuned amplifier\n", + "fr=1200.0; #Resonant frequency, kHz\n", + "\n", + "#Calculation\n", + "#(i)\n", + "BW=fr/Q; #Bandwidth, kHz\n", + "\n", + "#(ii)\n", + "f1=fr-(BW/2); #Lower cut-off frequency, kHz\n", + "f2=fr+(BW/2); #Upper cut-off frequency, kHz\n", + "\n", + "#Result\n", + "print(\"(i) The bandwidth=%dkHz\"%BW);\n", + "print(\"(ii) The lower and upper cut-off frequencies are=%dkHz and %dkHz.\"%(f1,f2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The bandwidth=20kHz\n", + "(ii) The lower and upper cut-off frequencies are=1190kHz and 1210kHz.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.5 : Page number 397\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fr=2.0; #Resonant frequency, MHz\n", + "BW=50.0; #Bandwidth, kHz\n", + "\n", + "#Calculation\n", + "#Since, bandwidth=resonant_frequency/quality_factor\n", + "Q=(fr*10**6)/(BW*10**3); #Quality factor\n", + "\n", + "#Result\n", + "print(\"The quality factor=%d\"%Q);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The quality factor=40\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.7 : Page number 400\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "C=0.1*10**-6; #Capacitor of parallel resonant circuit, F\n", + "L=33.0*10**-3; #Inductor of the parallel resonant circuit, H\n", + "R=25.0; #Resistor of the parallel resonant circuit, ohm\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "fr=(1/(2*pi*sqrt(L*C)))/1000; #Resonant frequency, kHz\n", + "\n", + "#(ii)\n", + "XL=2*pi*(fr*10**3)*L; #Inductive reactance, ohm\n", + "Q=round(XL/R,0); #Quality factor\n", + "\n", + "#(iii)\n", + "BW=(fr*10**3)/Q; #Bandwidth\n", + "\n", + "#Result\n", + "print(\"(i) The resonant frequency=%.2fkHz\"%fr);\n", + "print(\"(ii) The quality factor= %d.\"%Q);\n", + "print(\"(iii) The bandwidth=%dHz.\"%BW);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The resonant frequency=2.77kHz\n", + "(ii) The quality factor= 23.\n", + "(iii) The bandwidth=120Hz.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.8 : Page number 401-402\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "BW_dt=200.0; #Bandwidth, kHz\n", + "fr=10.0; #Operating frequency, MHz\n", + "\n", + "#Calculation\n", + "#Since, BW_dt=k*fr (i.e.,co-efficient_of_coupling * operating_frequency)\n", + "k=BW_dt/(fr*10**3); #co-efficient of coupling\n", + "\n", + "#Result\n", + "print(\"The co-efficient of coupling=%.2f.\"%k);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The co-efficient of coupling=0.02.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.9 : Page number 405\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "C=500.0*10**-12; #Capacitor of parallel resonant circuit, F\n", + "L=50.7*10**-6; #Inductor of the parallel resonant circuit, H\n", + "R=10.0; #Resistor of the parallel resonant circuit, ohm\n", + "RL=1.0; #Load resistance, mega ohm\n", + "\n", + "#Calculation\n", + "#(i)\n", + "fr=round((1/(2*pi*sqrt(L*C)))/1000); #Resonant frequency, Hz\n", + "\n", + "#(ii)\n", + "R_dc=R; #d.c load, ohm\n", + "XL=2*pi*(fr*1000)*L; #Inductive reactance, ohm\n", + "Q_coil=round(XL/R,1); #Quality factor\n", + "R_P=(Q_coil*XL)/1000 ; #Equivalent parallel resistance, kilo ohm\n", + "R_AC=(R_P*RL*10**3)/(R_P+RL*10**3); #A.C load,kilo ohm\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The resonant frequency=%dkHz\"%fr);\n", + "print(\"(ii) d.c load=%d ohm and a.c load=%d kilo ohm.\"%(R_dc,R_AC));\n", + "\n", + "#Note: In the text resonant frequency has been wrongly calculated to 106kHz but its actual value is approximately 1000kHz\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The resonant frequency=1000kHz\n", + "(ii) d.c load=10 ohm and a.c load=10 kilo ohm.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.10 : Page number 406-407\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RL=50.0; #Load resistance, ohm\n", + "n=5; #Turns ratio of the transformer\n", + "VCC=50.0; #Supply voltage, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "R_ac=n**2*RL; #A.C load, ohm\n", + "\n", + "#(ii)\n", + "P_o_max=VCC**2/(2*R_ac); #Maximum load power, W\n", + "\n", + "#Result\n", + "print(\"(i) The a.c load=%d ohm\"%R_ac);\n", + "print(\"(ii) Maximum load power=%dW\"%P_o_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The a.c load=1250 ohm\n", + "(ii) Maximum load power=1W\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 15.11 : Page number 407\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "P_D=4.0; #Maximum power dissipation, mW\n", + "P_o_max=1.0; #Maximum load power, W\n", + "\n", + "\n", + "#Calculation\n", + "max_collector_eff=(P_o_max/(P_o_max+(P_D/1000)))*100; #Maximum collector efficiency\n", + "\n", + "#Result\n", + "print(\"The maximum collector efficiency=%.1f%%\"%max_collector_eff);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum collector efficiency=99.6%\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter16_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter16_1.ipynb new file mode 100644 index 00000000..b2262b8f --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter16_1.ipynb @@ -0,0 +1,936 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:d4ffda068787fb0974622fa8de40f7d54b5df2a00735e870e01cb9df45be78f9" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 16 : MODULATION AND DEMODULATION" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.2 : Page number 416-417\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variabledeclaration\n", + "V_pp_max=16.0; #Maximum peak-to-peak voltage of an AM wave, mV\n", + "V_pp_min=4.0; #Minimum peak-to-peak voltage of an AM wave, mV\n", + "\n", + "#Calculation\n", + "Vmax=V_pp_max/2; #Maximum voltage of AM wave, mV\n", + "Vmin=V_pp_min/2; #Minimum voltage of AM wave, mV\n", + "m=(Vmax-Vmin)/(Vmax+Vmin); #Modulation factor.\n", + "\n", + "#Result\n", + "print(\"The modulation factor=%.1f.\"%m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The modulation factor=0.6.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.3 : Page number 417\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Es=50.0; #signalvoltage amplitude, V\n", + "Ec=100.0; #Carrier voltage amplitude, V\n", + "\n", + "\n", + "#Calculation\n", + "m=Es/Ec; #Modulation factor\n", + "\n", + "#Result\n", + "print(\"Modulation factor=%.1f.\"%m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Modulation factor=0.5.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.4 : Page number 419\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fc=2500.0; #Carrier frequency, kHz\n", + "f1=50.0; #Lower frequency of the audio signal, Hz\n", + "f2=15000.0; #Upper frequency of the audio signal, Hz\n", + "\n", + "#Calculation\n", + "fl_usb=fc+(f1/1000); #Lower frequency of upper sideband, kHz\n", + "fu_usb=fc+(f2/1000); #Upper frequency of upper sideband, kHz\n", + "\n", + "fu_lsb=fc-(f1/1000); #Lower frequency of upper sideband, kHz\n", + "fl_lsb=fc-(f2/1000); #Upper frequency of upper sideband, kHz\n", + "\n", + "#Since, f1=50Hz is negligible with respect to f2=15000Hz,\n", + "BW=(fc+(f2/1000))-(fc-(f2/1000)); #Bandwidth, kHz\n", + "\n", + "#Result\n", + "print(\"The upper sideband=%.2fkHz to %dkHz.\"%(fl_usb,fu_usb));\n", + "print(\"The lower sideband=%dkHz to %.2fkHz.\"%(fl_lsb,fu_lsb));\n", + "print(\"The bandwidth=%dkHz\"%BW);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The upper sideband=2500.05kHz to 2515kHz.\n", + "The lower sideband=2485kHz to 2499.95kHz.\n", + "The bandwidth=30kHz\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.5 : Page number 420\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "EC=5.0; #Carrier amplitude, V\n", + "m=0.6; #modulation factor\n", + "ws=6280.0; #angular frequency of signal, radians/s\n", + "wc=211*10**4; #angular frequency of carrier, radians/s\n", + "\n", + "#Calculation\n", + "fs=(ws/(2*pi))/1000; #Signal frequency, kHz\n", + "fc=(wc/(2*pi))/1000; #Carrier frequency, kHz\n", + "\n", + "#(i)\n", + "Max_amp=EC+m*EC; #Maximum amplitude of AM wave, V\n", + "Min_amp=EC-m*EC; #Minimum amplitude of AM wave, V\n", + "\n", + "#(ii)\n", + "frequency_components=[fc-fs,fc,fc+fs]; #frequency components, kHz\n", + "amplitudes=[m*EC/2,EC,m*EC/2]; #Corresponding amplitudes, V\n", + "\n", + "#Result\n", + "print(\"(i) The maximum and minimum amplitudes of AM wave=%dV and %dV.\"%(Max_amp,Min_amp));\n", + "print(\"(ii) The frequency components of the AM wave=%.0f,%.0f,%.0f.\"%(frequency_components[0],frequency_components[1],frequency_components[2]));\n", + "print(\" The corresponding amplitudes are =%.1fV, %dV, %.1fV.\"%(amplitudes[0],amplitudes[1],amplitudes[2]));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The maximum and minimum amplitudes of AM wave=8V and 2V.\n", + "(ii) The frequency components of the AM wave=335,336,337.\n", + " The corresponding amplitudes are =1.5V, 5V, 1.5V.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.6 : Page number 420-421\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fc=1000.0; #Carrier frequency, kHz\n", + "fs=5.0; #Signal frequency, kHz\n", + "m=0.5; #Modulation factor\n", + "EC=100.0; #Amplitude of the carrier, V\n", + "\n", + "#Calculation\n", + "f_lsb=fc-fs; #Lower sideband frequency,kHz\n", + "f_usb=fc+fs; #Upper sideband frequency, kHz\n", + "Amplitude=m*EC/2; #Amplitude of each sideband, V\n", + "\n", + "#Result\n", + "print(\"The lower and upper sideband frequencies are=%dkHz and %dkHz.\"%(f_lsb,f_usb));\n", + "print(\"The amplitude of each sideband =%dV\"%Amplitude);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The lower and upper sideband frequencies are=995kHz and 1005kHz.\n", + "The amplitude of each sideband =25V\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.7 : Page number 421\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "EC=10.0; #Carrier amplitude, V\n", + "ES=6.0; #Signal amplitude, V\n", + "fc=10.0; #Carrier frequency, MHz\n", + "fs=5/1000.0; #Signal frequency. MHz\n", + "\n", + "#Calculation\n", + "#(i)\n", + "m=ES/EC; #Modulation factor\n", + "\n", + "#(ii)\n", + "f_lsb=fc-fs; #Lower sideband frequency,MHz\n", + "f_usb=fc+fs; #Upper sideband frequency, MHz\n", + "\n", + "#(iii)\n", + "Amplitude=m*EC/2; #Amplitude of each sideband, V\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The modulation factor=%.1f.\"%m);\n", + "print(\"(ii) The lower and upper sideband frequencies are=%.3fMHz and %.3fMHz.\"%(f_lsb,f_usb));\n", + "print(\"(iii) The amplitude of each sideband =%dV\"%Amplitude);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The modulation factor=0.6.\n", + "(ii) The lower and upper sideband frequencies are=9.995MHz and 10.005MHz.\n", + "(iii) The amplitude of each sideband =3V\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.8 : Page number 423\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Pc=500.0; #Carrier power, W\n", + "m=1.0; #Modulation factor\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Ps=(1/2.0)*m**2*Pc; #Sideband power, W\n", + "\n", + "#(ii)\n", + "PT=Pc+Ps; #Power of AM wave, W\n", + "\n", + "#Result\n", + "print(\"(i) The power in sidebands=%dW\"%Ps);\n", + "print(\"(ii) The power of AM wave=%dW\"%PT);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The power in sidebands=250W\n", + "(ii) The power of AM wave=750W\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exmaple 16.9 : Page number 423\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Pc=50.0; #Power of carrier, kW\n", + "\n", + "#Calculation\n", + "#(i)\n", + "m=80/100.0; #Modulation factor\n", + "Ps=(1/2.0)*m**2*Pc; #Sideband Power, kW\n", + "print(\"(i) The sideband power for 80%% modulation=%dkW.\"%Ps);\n", + "\n", + "#(ii)\n", + "m=10/100.0; #Modulation factor\n", + "Ps=(1/2.0)*m**2*Pc; #Sideband Power, kW\n", + "print(\"(ii) The sideband power for 10%% modulation=%.2fkW.\"%Ps);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The sideband power for 80% modulation=16kW.\n", + "(ii) The sideband power for 10% modulation=0.25kW.\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.10 : Page number 423-424\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Pc=40.0; #Carrier power, kW\n", + "m=100/100.0; #Modulation index\n", + "amplifier_eff=72/100.0; #Efficiency of modulated RF amplifier\n", + "\n", + "\n", + "#Calculation\n", + "#(i)Carrier power remains same after modulation\n", + "\n", + "#(ii)\n", + "Ps=(1/2.0)*(m**2)*Pc; #Sideband power\n", + "P_audio=Ps/amplifier_eff; #Required audio power, kW\n", + "\n", + "#Result\n", + "print(\"(i) The carrier power=%dkW.\"%Pc);\n", + "print(\"(ii) The required audio power=%.1fkW.\"%P_audio);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The carrier power=40kW.\n", + "(ii) The required audio power=27.8kW.\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.11 : Page number 424\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fs=1.0; #Signal frequency, kHz\n", + "fc=500.0; #Carrier frequency, kHz\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "sideband_f=[fc-fs,fc+fs]; #Sideband frequencies, kHz\n", + "\n", + "#(ii)\n", + "BW=(fc+fs)-(fc-fs); #Bandwidth required, kHz\n", + "\n", + "#Result\n", + "print(\"(i) The sideband frequencies=%dkHz and %dkHz.\"%(sideband_f[0],sideband_f[1]));\n", + "print(\"(ii) The bandwidth required=%dkHz\"%BW);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The sideband frequencies=499kHz and 501kHz.\n", + "(ii) The bandwidth required=2kHz\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.12 : Page number 424\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "IC=8.0; #Antenna current due to carrier,A\n", + "m=40/100.0; #Modulation index\n", + "\n", + "#Calculation\n", + "#Since, Ps=(1/2)*m\u00b2*Pc and PT=Pc+Ps (Total_power=carrier_power+signal_power)\n", + "#that implies, (PT/Pc)=1+(m\u00b2/2),\n", + "#So, square_of(Total_current/Carrier_current)=(IT/IC)\u00b2=1+(m\u00b2/2).\n", + "IT=IC*sqrt(1+(m**2/2.0)); #Total current, A\n", + "\n", + "\n", + "#Result\n", + "print(\"The total antenna current=%.2fA.\"%IT);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The total antenna current=8.31A.\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.13 : Page number 424\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "IC=8.0; #Antenna current when only carrier is sent, A\n", + "IT=8.93; #Total antenna current, A\n", + "\n", + "\n", + "#Calculation\n", + "#Since, Ps=(1/2)*m\u00b2*Pc and PT=Pc+Ps (Total_power=carrier_power+signal_power)\n", + "#that implies, (PT/Pc)=1+(m\u00b2/2),\n", + "#So, square_of(Total_current/Carrier_current)=(IT/IC)\u00b2=1+(m\u00b2/2).\n", + "m=sqrt((((IT/IC)**2)-1)*2)*100; #The %age of modulation\n", + "\n", + "#Result\n", + "print(\"The %%age of modulation=%.1f%%.\"%m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The %age of modulation=70.1%.\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.14 : Page number 425\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "Vc=100.0; #Carrier voltage, V\n", + "V_T=110.0; #The total voltage after modulation, V\n", + "\n", + "#Calculation\n", + "#Since, Ps=(1/2)*m\u00b2*Pc and PT=Pc+Ps (Total_power=carrier_power+signal_power)\n", + "#that implies, (PT/Pc)=1+(m\u00b2/2),\n", + "#So, square_of(Total_voltage/Carrier_voltage)=(V_T/Vc)\u00b2=1+(m\u00b2/2).\n", + "m=sqrt((((V_T/Vc)**2)-1)*2); #The %age of modulation\n", + "\n", + "#Result\n", + "print(\"The modulation index =%.3f.\"%m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The modulation index =0.648.\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.15 : Page number 425-426\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vc=5.0; #Carrier voltage, V\n", + "V_lsb=2.5; #Lower sideband component, V\n", + "V_usb=2.5; #Upper sideband component, V\n", + "R=2.0; #Resistor driven by AM wave, k\u03a9\n", + "\n", + "#Calculation\n", + "#Since, power=(r.m.s_voltage)\u00b2/resistance\n", + "#(i)\n", + "Pc=round((0.707*Vc)**2/R,2); #Carrier power mW\n", + "\n", + "#(ii)\n", + "P_lower=round((0.707*V_lsb)**2/R,3); #Power delivered by lower sideband, mW\n", + "\n", + "#(iii)\n", + "P_upper=round((0.707*V_usb)**2/R,3); #Power delivered by upper sideband, mW\n", + "\n", + "P_T=round(Pc+P_lower+P_upper,3); #Total power delivered by the AM wave, mW\n", + "\n", + "#Result\n", + "print(\"(i) The carrier power=%.2fmW\"%Pc);\n", + "print(\"(ii) The power delivered by lower sideband=%.3fmW\"%P_lower);\n", + "print(\"(iii) The power delivered by upper sideband=%.3fmW\"%P_upper);\n", + "print(\"The total power delivered by the AM wave=%.3fmW\"%P_T);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The carrier power=6.25mW\n", + "(ii) The power delivered by lower sideband=1.562mW\n", + "(iii) The power delivered by upper sideband=1.562mW\n", + "The total power delivered by the AM wave=9.374mW\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.16 : Page number 428\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "wc=6e08; #Carrier angular frequency, rad/s\n", + "ws=1250.0; #Signal angular frequency, rad/s\n", + "mf=5; #Modulation index\n", + "Ec=12.0; #Carrier amplitude, V\n", + "R=10.0; #Resistor, \u03a9\n", + "\n", + "#Calculation\n", + "#(i)\n", + "fc=wc/(2*pi); #Carrier frequency, Hz\n", + "\n", + "#(ii)\n", + "fs=ws/(2*pi); #Signal frequency, Hz\n", + "\n", + "#(iv)\n", + "delta_f=mf*fs; #Maximum frequency deviation, Hz\n", + "\n", + "#(v)\n", + "P=(Ec/sqrt(2))**2/R; #Power dissipated, W\n", + "\n", + "#Result\n", + "print(\"(i) The carrier frequency=%.1fe06 Hz.\"%(fc/10**6));\n", + "print(\"(ii) The signal frequency=%.0f Hz.\"%fs);\n", + "print(\"(iii) The modulation index=%d.\"%mf);\n", + "print(\"(iv) The maximum frequency deviation=%.0fHz.\"%delta_f);\n", + "print(\"(v) The power dissipated=%.1fW.\"%P);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The carrier frequency=95.5e06 Hz.\n", + "(ii) The signal frequency=199 Hz.\n", + "(iii) The modulation index=5.\n", + "(iv) The maximum frequency deviation=995Hz.\n", + "(v) The power dissipated=7.2W.\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.17 : Page number 428-429\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "fc=25.0; #Carrier frequency, MHz\n", + "fs=400.0; #Signal frequency, Hz\n", + "Ec=4.0; #Carrier amplitude, V\n", + "delta_f=10.0; #Maximum frequency deviation, kHz\n", + "\n", + "#Calculation\n", + "wc=2*pi*fc*10**6; #Carrier angular frequency, rad/s\n", + "ws=2*pi*fs; #Signal angular frequency, rad/s\n", + "mf=delta_f*1000/fs; #Modulation index\n", + "\n", + "\n", + "#Result\n", + "print(\"e=%dcos(%.2et + %dsin%dt)\"%(Ec,wc,mf,ws));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "e=4cos(1.57e+08t + 25sin2513t)\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.18 : Page number 429\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "delta_f=50.0; #Maximum frequency deviation, kHz\n", + "fs=5.0; #Modulating frequency, kHz\n", + "\n", + "#Calculation\n", + "mf=delta_f/fs; #Modulation index\n", + "\n", + "#Result\n", + "print(\"The modulation index=%d\"%mf);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The modulation index=10\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.19 : Page number 429\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fc=1000.0; #Carrier frequency, kHz\n", + "fs=15.0; #Modulating frequency, kHz\n", + "\n", + "#Calculation\n", + "first_3_usb_f=[fc+fs,fc+2*fs,fc+3*fs]; #First three upper sideband frequncies, kHz\n", + "first_3_lsb_f=[fc-fs,fc-2*fs,fc-3*fs]; #First three lowerr sideband frequncies, kHz\n", + "\n", + "\n", + "#Result\n", + "print(\"The first three upper sideband frequencies=%dkHz ,%dkHz and %dkHz.\"%(first_3_usb_f[0],first_3_usb_f[1],first_3_usb_f[2]));\n", + "print(\"The first three lower sideband frequencies=%dkHz ,%dkHz and %dkHz.\"%(first_3_lsb_f[0],first_3_lsb_f[1],first_3_lsb_f[2]));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The first three upper sideband frequencies=1015kHz ,1030kHz and 1045kHz.\n", + "The first three lower sideband frequencies=985kHz ,970kHz and 955kHz.\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.20 : Page number 429\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fs=15.0; #Modulating frequency, kHz\n", + "delta_f=75.0; #Maximum frequency deviation, kHz\n", + "\n", + "#Calculation\n", + "BW=2*(delta_f+fs); #Bandwidth, kHz\n", + "\n", + "#Result\n", + "print(\"The bandwidth of the FM signal=%dkHz.\"%BW);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The bandwidth of the FM signal=180kHz.\n" + ] + } + ], + "prompt_number": 25 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.21 : Page number 429\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "k=75.0; #Frequency deviation constant, kHz/V\n", + "Es=2.0; #Amplitude of signal, V\n", + "\n", + "\n", + "#Calculation\n", + "delta_f=k*Es; #Maximum frequency deviation, kHz\n", + "\n", + "#Result\n", + "print(\"The maximum frequency deviation=%dkHz.\"%delta_f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum frequency deviation=150kHz.\n" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 16.22 : Page number 429-430\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "fs1=500.0; #First audio frequency, Hz\n", + "fs2=200.0; #Second audio frequency (decreased), Hz\n", + "Es=2.4; #AF voltage, V\n", + "delta_f1=4.8; #Frequency deviation,kHz\n", + "\n", + "#Calculation\n", + "k=delta_f1/Es; #Frequency deviation constant, kHz/V\n", + "Es=7.2; #AF voltage, V (increased)\n", + "delta_f2=k*Es; #2nd frequency deviation, kHz\n", + "Es=10.0; #AF voltage, V (increased)\n", + "delta_f3=k*Es; #3rd frequency deviation, kHz\n", + "\n", + "mf1=delta_f1/(fs1/1000); #Modulation index in 1st case\n", + "mf2=delta_f2/(fs1/1000); #Modulation index in 2nd case\n", + "mf3=delta_f3/(fs2/1000); #Modulation index in 3rd case\n", + "\n", + "#Result\n", + "print(\"The frequency deviation in second case=%.1fkHz.\"%delta_f2);\n", + "print(\"The frequency deviation in third case=%dkHz.\"%delta_f3);\n", + "print(\"The modulation index in 1st case=%.1f\"%mf1);\n", + "print(\"The modulation index in 2nd case=%.1f\"%mf2);\n", + "print(\"The modulation index in 3rd case=%d\"%mf3);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The frequency deviation in second case=14.4kHz.\n", + "The frequency deviation in third case=20kHz.\n", + "The modulation index in 1st case=9.6\n", + "The modulation index in 2nd case=28.8\n", + "The modulation index in 3rd case=100\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter17_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter17_1.ipynb new file mode 100644 index 00000000..2c9a49a5 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter17_1.ipynb @@ -0,0 +1,877 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:33d9a7285654630dd24f2d6229210244e78961e0605c11041ed1b2f130cb19a1" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 17 : REGULATED D.C POWER SUPPLY" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.1 : Page number 444\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_NL=400.0; #Output voltage with no-load, V\n", + "V_FL=300.0; #Output voltage with full-load, V\n", + "\n", + "\n", + "#Calculation\n", + "percentage_voltage_regulation=((V_NL-V_FL)/V_FL)*100; #Percentage of voltage regulation\n", + "\n", + "#Result\n", + "print(\"The percentage of voltage regulation=%.2f%%.\"%percentage_voltage_regulation);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The percentage of voltage regulation=33.33%.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.2 : Page number 444\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_regulation=1.0; #%age voltage regulation\n", + "V_NL=30.0; #Output voltage with no-load,V\n", + "\n", + "#Calculation\n", + "#Since, %age_of_voltage_regulation=((V_NL-V_FL)/V_FL)*100\n", + "V_FL=V_NL/(1+(V_regulation/100)); #Output voltage with full-load, V\n", + "\n", + "#Result\n", + "print(\"The full-load voltage=%.1fV.\"%V_FL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The full-load voltage=29.7V.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.3 : Page number 445\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_NL_A=30.0; #Output voltage of supply A with no-load, V\n", + "V_FL_A=25.0; #Output voltage of supply A with full-load, V\n", + "V_NL_B=30.0; #Output voltage of supply B with no-load, V\n", + "V_FL_B=29.0; #Output voltage of supply B with full-load, V\n", + "\n", + "\n", + "#Calculation\n", + "V_regulation_A=((V_NL_A-V_FL_A)/V_FL_A)*100; #%age of voltage regulation in power supply A\n", + "V_regulation_B=((V_NL_B-V_FL_B)/V_FL_B)*100; #%age of voltage regulation in power supply B\n", + "\n", + "#Result\n", + "if(V_regulation_A<V_regulation_B):\n", + " print(\"Power supply A is better than B.\");\n", + "else :\n", + " print(\"Power supply B is better than A.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power supply B is better than A.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.4 : Page number 445\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_NL=500.0; #Output voltage with no-load, V\n", + "V_FL=300.0; #Output voltage with full-load, V\n", + "I_FL=120.0; #Output current with full-load, mA\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Regulation=((V_NL-V_FL)/V_FL)*100; #Voltage regulation percentage\n", + "\n", + "#(ii)\n", + "RL_min=V_FL/I_FL; #Minimum load resistance, k\u03a9\n", + "\n", + "#Result\n", + "print(\"(i) The voltage regulation=%.1f%%.\"%Regulation);\n", + "print(\"(ii)The minimum load resistance=%.1fk\u03a9.\"%RL_min);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The voltage regulation=66.7%.\n", + "(ii)The minimum load resistance=2.5k\u03a9.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.5 : Page number 445\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VL_1=10.5; #Initial output voltage with load, V\n", + "VL_2=10.0; #Decreased output voltage with additional load, V\n", + "IL_1=1.0; #Initial load current, A\n", + "IL_added=1.0; #Added load current, A\n", + "\n", + "#Calculation\n", + "delta_VL=VL_1-VL_2; #Change in output voltage, V\n", + "delta_IL=IL_added; #Change in load current, A\n", + "\n", + "#(i)\n", + "Zo=delta_VL/delta_IL; #Output impedance of power supply, \u03a9 (OHM's LAW)\n", + "\n", + "#(ii)\n", + "#Since, Output_impedance=change_in_output_voltage/change_in_output_current\n", + "#Zo=(V_NL-VL_1)/delta_IL,\n", + "delta_IL=IL_1; #Change in load current, A\n", + "V_NL=VL_1+(delta_IL*Zo); #Output voltage with no load, V\n", + "\n", + "#Result\n", + "print(\"(i) The output impedance=%.1f\u03a9.\"%Zo);\n", + "print(\"(ii) The output voltage with no-load=%dV.\"%V_NL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The output impedance=0.5\u03a9.\n", + "(ii) The output voltage with no-load=11V.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.6 : Page number 446\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Zo=0.01; #Output impedance, \u03a9\n", + "IL_max=1.0; #Maximum output current, A\n", + "IL_min=0.5 #Minimum output current, A\n", + "f=10.0; #Frequency, kHz\n", + "\n", + "#Calculation\n", + "#Since, Zo=delta_VL/delta_IL\n", + "delta_IL=IL_max-IL_min; #Maximum change in output current, A\n", + "delta_VL=(Zo*delta_IL)*1000; #Fluctuations in output voltage, mV\n", + "\n", + "#Result\n", + "print(\"The output voltage will have %dmV peak-to-peak fluctuation at a rate of %dkHz.\"%(delta_VL,f));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output voltage will have 5mV peak-to-peak fluctuation at a rate of 10kHz.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.7 : Page number 446\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "delta_Vout=10.0; #Change in output voltage, \u03bcV\n", + "delta_Vin=5.0; #Change in input voltage, V\n", + "\n", + "#Calculation\n", + "Line_regulation=delta_Vout/delta_Vin; #Line regulation, \u03bcV/V\n", + "\n", + "#Result\n", + "print(\"The line regulation of the voltage regulator=%d\u03bcV/V.\"%Line_regulation);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The line regulation of the voltage regulator=2\u03bcV/V.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.8 : Page number 449-450\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vin=24.0; #Input voltage, V\n", + "Vz=12.0; #Zener voltage, V\n", + "Rs=160.0; #Series resistance, \u03a9\n", + "RL_max=float('inf'); #Maximum load resistance, \u03a9\n", + "RL_min=200.0; #Minimum load resistance, \u03a9\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Vout=Vz; #Output voltage,(equal to zener regulated voltage), V\n", + "Is=((Vin-Vout)/Rs)*1000; #Current through series resistance, mA\n", + "\n", + "#(ii)\n", + "IL_min=Vout/RL_max; #Minimum load current, A\n", + "IL_max=(Vout/RL_min)*1000; #Maximum load current, mA\n", + "\n", + "#(iii)\n", + "IZ_min=Is-IL_max; #Minimum zener current, mA\n", + "IZ_max=Is-IL_min; #Maximum zener current, mA\n", + "\n", + "#Result\n", + "print(\"(i) The current through the series resistance=%dmA\"%Is);\n", + "print(\"(ii) The minimum and maximum load currents are=%dA and %dmA\"%(IL_min,IL_max));\n", + "print(\"(iii) The minimum and maximum zener currents are=%dmA and %dmA\"%(IZ_min,IZ_max));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The current through the series resistance=75mA\n", + "(ii) The minimum and maximum load currents are=0A and 60mA\n", + "(iii) The minimum and maximum zener currents are=15mA and 75mA\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.9 : Page number 450\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VZ=15.0; #Zener voltage, V\n", + "Vin_min=22.0 #Minimum input voltage, V\n", + "Vin_max=40.0 #Maximum input voltage, V\n", + "Vout=VZ; #Regulated output voltage, V\n", + "IL_max=100.0; #Maximum load current, mA\n", + "IL_min=20.0; #Minimum load current, mA\n", + "\n", + "#Calculation\n", + "RS_max=(Vin_min-Vout)/(IL_max/1000); #Maximum value of series resistance, \u03a9 (OHM'S lAW)\n", + "\n", + "#Result\n", + "print(\"The maximum load resistance to hold the voltage constant=%d\u03a9.\"%RS_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum load resistance to hold the voltage constant=70\u03a9.\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.10 : Page number 450-451\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=3.3; #Zener voltage, V\n", + "Iz_min=3.0; #Minimum zener current, mA\n", + "Iz_max=100.0; #Maximum zener current, mA\n", + "RL_max=2.0; #Maximum load resistance, k\u03a9\n", + "RL_min=500.0; #Minimum load resistance, \u03a9\n", + "Vin=20.0; #Input voltage, V\n", + "\n", + "#Calculation\n", + "Rs_min=(Vin-Vz)/(Iz_max/1000); #Minimum series resistance required, \u03a9\n", + "\n", + "#Result\n", + "print(\"The minimum series resistance required to limit the zener current=%.0f\u03a9.\"%Rs_min);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The minimum series resistance required to limit the zener current=167\u03a9.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.11 : Page number 451\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=3.3; #Zener voltage, V\n", + "Iz_min=3.0; #Minimum zener current, mA\n", + "Iz_max=100.0; #Maximum zener current, mA\n", + "RL_max=2.0; #Maximum load resistance, k\u03a9\n", + "RL_min=500.0; #Minimum load resistance, \u03a9\n", + "Vin=20.0; #Input voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "IL_max=(Vz/RL_min)*1000; #Maximum load current, mA\n", + "Rs_max=((Vin-Vz)/(IL_max+Iz_min))*1000; #Maximum series resistance, \u03a9\n", + "\n", + "#Result\n", + "print(\"The maximum allowable value of series resistance=%d\u03a9.\"%Rs_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum allowable value of series resistance=1739\u03a9.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.12 : Page number 452\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=10.0; #Zener voltage, V\n", + "beta=100.0; #Base current amplification factor\n", + "RL=1000.0; #Load resistance, \u03a9\n", + "VBE=0.5; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "Vout=Vz-VBE; #Output voltage, V\n", + "IL=(Vout/RL)*1000; #Load current, mA\n", + "\n", + "#Result\n", + "print(\"The output voltage=%.1fV.\"%Vout);\n", + "print(\"The load current=%.1fmA\"%IL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output voltage=9.5V.\n", + "The load current=9.5mA\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.3 : Page number 452\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "IC=1.0; #Required current(collector current), A\n", + "Vout=6.0; #Constant output voltage, V\n", + "Vin=10.0; #Supply voltage, V\n", + "beta=50.0; #Base current amplification factor\n", + "VBE=0.5; #Base-emitter voltage, V\n", + "Iz=10.0; #Minimum zener current, mA\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IB=(IC/beta)*1000; #Base current, mA\n", + "\n", + "#Since, Vout=Vz-VBE;\n", + "Vz=Vout+VBE; #Zener breakdown voltage, V\n", + "\n", + "#(ii)\n", + "V_Rs=Vin-Vz; #Voltage across series resistance Rs, V\n", + "Rs=(V_Rs/(IB+Iz))*1000; #Series resistance, \u03a9\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The zener breakdown voltage=%.1fV\"%Vz);\n", + "print(\"(ii)The series resistance=%.0f\u03a9.\"%Rs);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The zener breakdown voltage=6.5V\n", + "(ii)The series resistance=117\u03a9.\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.14: Page number 452-453\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=12.0; #Zener voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "Vin=20.0; #Input voltage, V\n", + "RS=220.0; #Series resistance, \u03a9\n", + "RL=1.0; #Load resistance, k\u03a9\n", + "beta=50.0; #Base current amplification factor\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Vout=Vz-VBE; #Output voltage, V\n", + "\n", + "#(ii)\n", + "V_RS=Vin-Vz; #Voltage across series resistance, RS, V\n", + "IR=(V_RS/RS)*1000; #Current through series resistance, mA\n", + "IL=Vout/RL; #Load current, mA\n", + "\n", + "#Since, IL is emitter current and emitter current is approx. equal to collector current,\n", + "IC=IL; #Collector current, mA\n", + "IB=IC/beta; #Base current, mA\n", + "Iz=IR-IB; #Zener current, mA\n", + "\n", + "#Result\n", + "print(\"(i) The output voltage=%.1fV.\"%Vout);\n", + "print(\"(ii) The zener current=%dmA\"%Iz);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The output voltage=11.3V.\n", + "(ii) The zener current=36mA\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.15 : Page number 453-454\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import ceil\n", + "from math import floor\n", + "\n", + "#Variable declaration\n", + "IL_min=0; #Minimum load current, A\n", + "IL_max=1.0; #Maximum load current, A\n", + "Vin_min=12.0; #Minimum input voltage, V\n", + "Vin_max=18.0; #Maximum input voltage, V\n", + "Iz_min=1.0; #Minimum zener current, mA\n", + "Vz=8.5; #Zener voltage, V\n", + "beta=50.0; #Base current amplification factor\n", + "\n", + "\n", + "#Calculation\n", + "IB_max=(IL_max/beta)*1000; #Maximum base current, mA\n", + "I_RS=Iz_min+IB_max; #Current through the series resistance, mA\n", + "RS=((Vin_min-Vz)/I_RS)*1000; #Series resistance, \u03a9\n", + "\n", + "#(ii)\n", + "V_RS_max=Vin_max-Vz; #Maximum voltage across series resistance, V\n", + "P_max_RS=ceil((V_RS_max**2/RS)*1000)/1000; #Maximum power dissipation in series resistance RS, W\n", + "\n", + "#(iii)\n", + "I_RS_max=V_RS_max/floor(RS); #Maximum current through series resistance,mA\n", + "Iz_max=I_RS_max; #Maximum zener current, mA\n", + "P_z_max=Vz*Iz_max; #Maximum power dissipated in zener diode, W\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The series resistance=%d\u03a9.\"%RS);\n", + "print(\"(ii) The maximum power dissipated in series resistance=%.3fW.\"%P_max_RS);\n", + "print(\"(iii)The maximum power dissipated in zener diode=%.3fW.\"%P_z_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The series resistance=166\u03a9.\n", + "(ii) The maximum power dissipated in series resistance=0.542W.\n", + "(iii)The maximum power dissipated in zener diode=0.486W.\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.16 : Page number 456\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=2.0; #Resistor R1, k\u03a9\n", + "R2=1.0; #Resistor R2, k\u03a9\n", + "Vz=6.0; #Zener voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "m=R2/(R1+R2); #Feedback fraction\n", + "A_CL=1/m; #Closed-loop voltage gain\n", + "Vout=A_CL*(Vz+VBE); #Regulated output voltage, V\n", + "\n", + "#Result\n", + "print(\"The regulated output voltage=%.1fV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The regulated output voltage=20.1V\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.17 : Page number 456\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=30.0; #Resistor R1, k\u03a9\n", + "R2=10.0; #Resistor R2, k\u03a9\n", + "\n", + "#Calculation\n", + "m=R2/(R1+R2); #Feedback fraction\n", + "A_CL=1/m; #Closed-loop voltage gain\n", + "\n", + "\n", + "#Result\n", + "print(\"The closed-loop voltage gain=%d.\"%A_CL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The closed-loop voltage gain=4.\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.18 : Page number 457\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vin=22.0; #Input voltage, V\n", + "Rs=130.0; #Series resistance, \u03a9\n", + "Vz=8.3; #Zener voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "RL=100.0; #Load resistance, \u03a9\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Vout=Vz+VBE; #Output voltage, V\n", + "\n", + "#(ii)\n", + "IL=(Vout/RL)*1000; #Load current, mA (OHM's LAW)\n", + "IS=((Vin-Vout)/Rs)*1000; #Current through series resistance, mA (OHM's LAW)\n", + "IC=IS-IL; #Collector current, mA\n", + "\n", + "#Result\n", + "print(\"(i) The regulated output voltage=%dV\"%Vout);\n", + "print(\"(ii) Various currents for the shunt regulator are: IL=%dmA , IS=%dmA and IC=%dmA\"%(IL,IS,IC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The regulated output voltage=9V\n", + "(ii) Various currents for the shunt regulator are: IL=90mA , IS=100mA and IC=10mA\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.20 : Page number 463\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=240.0; #Resistor R1 of the regulator, \u03a9\n", + "R2=2.4; #Variable resistance R2 of the regulator, k\u03a9\n", + "\n", + "#Calculation\n", + "Vout=1.25*(R2*1000/R1 + 1); #Regulated output voltage, V\n", + "\n", + "#Result\n", + "print(\"The regulated output voltage=%.2fV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The regulated output voltage=13.75V.\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 17.21 : Page number 463\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vout_adj=8.0; #Output voltage (adjusted), V\n", + "Vd=40.0; #Input/output differential rating, V\n", + "\n", + "#Calculation\n", + "Vin_max=Vout_adj+Vd; #Maximum allowable input voltage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"The maximum allowable input voltage=%dV.\"%Vin_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum allowable input voltage=48V.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter18_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter18_1.ipynb new file mode 100644 index 00000000..34ff63b3 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter18_1.ipynb @@ -0,0 +1,815 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:5aefee63b41b58f0caeac1aa6be18e130e4530aaaa6bc5e9bbc45b3687d3f8e9" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 18 : SOLID-STATE SWITCHING CIRCUITS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.1 : Page number 472" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10; #Supply voltage, V\n", + "RC=1.0; #Collector resistor, k\u03a9\n", + "RB=47.0; #Base resistor, k\u03a9\n", + "beta=100.0; #Base current amplification factor\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "IC_sat=VCC/RC; #Collector saturation current, mA\n", + "IB=IC_sat/beta; #Base current, mA\n", + "V=IB*RB+VBE; #Input voltage, V\n", + "\n", + "#Result\n", + "print(\"Input voltage required to saturate the transistor switch=%.1fV.\"%V);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Input voltage required to saturate the transistor switch=5.4V.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.2 : Page number 475" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10; #Supply voltage, V\n", + "RC=1.0; #Collector resistor, k\u03a9\n", + "ICBO=10.0; #Collector leakage current, \u03bcA\n", + "V_knee=0.7; #Knee voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IC=ICBO; #Collector current, \u03bcA\n", + "VCE=VCC-(ICBO/1000)*RC; #Collector-emitter voltage, V\n", + "\n", + "print(\"(i) The collector emitter voltage at cut-off=%.2fV.\"%VCE);\n", + "\n", + "#(ii)\n", + "#Since, saturation current=IC_sat=(VCC-V_knee)/RC; \n", + "VCE=V_knee; #Collector-emitter voltage, V\n", + "\n", + "print(\"(ii) The collector emitter voltage at saturation=%.1fV.\"%VCE);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The collector emitter voltage at cut-off=9.99V.\n", + "(ii) The collector emitter voltage at saturation=0.7V.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.3 : Page number 475-476" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10; #Supply voltage, V\n", + "RC=1; #Collector resistor, k\u03a9\n", + "VBB=2; #Supply voltage to base, V\n", + "RB=2.7; #Base resistor, k\u03a9\n", + "V_knee=0.7; #Knee voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IB=round((VBB-VBE)/RB,2); #Base current, mA\n", + "Ic_sat=(VCC-V_knee)/RC; #Collector saturation current, mA\n", + "beta_min=Ic_sat/IB; #Minimum value of base current amplification factor\n", + "print(\"(i) Minimum \u03b2=%.1f.\"%beta_min);\n", + "\n", + "#(ii)\n", + "VBB=1; #Supply voltage to base(changed), V\n", + "beta=50; #Base current amplification factor\n", + "IB=(VBB-VBE)/RB; #Base current, mA\n", + "IC=beta*IB; #Collector current,mA\n", + "\n", + "if(IC<Ic_sat):\n", + " print(\"(ii) The transistor will not be saturated.\");\n", + "else:\n", + " print(\"(ii) The transistor will be saturated.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Minimum \u03b2=19.4.\n", + "(ii) The transistor will not be saturated.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.4 : Page number 480" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R2=10; #Resistor R2, k\u03a9\n", + "R3=10; #Resistor R3, k\u03a9\n", + "C1=0.01; #Capacitor of 1st transistor, \u03bcF\n", + "C2=0.01; #Capacitor of 2nd transistor, \u03bcF\n", + "\n", + "#Calculation\n", + "R=R2*1000; #Resistance, \u03a9\n", + "C=C1*10**-6; #Capacitance, F\n", + "T=round((1.4*R*C)*1000,2); #Time period,m sec\n", + "f=1/(T*10**-3); #Frequency, Hz\n", + "f=f/1000; #Frequency, kHz\n", + "\n", + "#Result\n", + "print(\"Time period of the square wave=%.2f m sec.\"%T);\n", + "print(\"Time frequency of the square wave=%d kHz.\"%f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Time period of the square wave=0.14 m sec.\n", + "Time frequency of the square wave=7 kHz.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.6 : Page number 485" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=10; #Resistance in differentiating circuit, k\u03a9\n", + "C=2.2; #Capacitance in differentiating circuit, \u03bcF\n", + "d_ei=10; #Change in input voltage, V\n", + "dt=0.4; #Time in which change occurs, s\n", + "\n", + "#Calculation\n", + "eo=R*1000*C*10**-6*d_ei/dt\n", + "\n", + "\n", + "#Result\n", + "print(\"The output voltage=%.2fV.\"%eo);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output voltage=0.55V.\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.7 : Page number 489" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vin_peak=12; #Peak value of input voltage, V\n", + "V_D=0.7; #Forward bias voltage of diode, V\n", + "\n", + "#Calculation\n", + "Vout_peak=Vin_peak-V_D; #Peak value of output voltage, V\n", + "\n", + "#Result\n", + "print(\"The peak output voltage=%.1fV.\"%Vout_peak);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The peak output voltage=11.3V.\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.8 : Page number 489" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vin_peak=10; #Peak value of input voltage, V\n", + "R=1; #Input resistor, k\u03a9\n", + "RL=4; #Load resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "Vout_peak=(Vin_peak*RL)/(R+RL); #Peak output voltage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"The peak output voltage=%dV.\"%Vout_peak);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The peak output voltage=8V.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.9 : Page number 490" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vin=-10; #Input voltage, V\n", + "V_D=0.7; #Forward bias voltage of the diode, V\n", + "R=1; #Resistance, k\u03a9\n", + "\n", + "\n", + "print(\"The diode will be forward biased for the negative half-cycle of input signal.\");\n", + "Vout=-V_D; #Output voltage, V\n", + "V_R=Vin-(-V_D); #Voltage across resistor R, V\n", + "\n", + "#Result\n", + "print(\"The output voltage=%.1fV.\"%Vout);\n", + "print(\"The voltage across R=%.1fV.\"%V_R);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The diode will be forward biased for the negative half-cycle of input signal.\n", + "The output voltage=-0.7V.\n", + "The voltage across R=-9.3V.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.10 : Page number 490-491" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_F=0.7; #Forward bias voltage of diode, V\n", + "R=200.0; #Input resistor of the circuit, \u03a9\n", + "RL=1.0; #Load resistor, k\u03a9\n", + "Vin_peak=10.0; #Peak input voltage, V\n", + "\n", + "\n", + "#Calculations\n", + "\n", + "#Positive half-cycle:\n", + "print(\"During the positive half cycle, the diode is foward biased and can be replaced by battery of %.1fV.\"%V_F);\n", + "print(\"Therefore, Vout=%.1fV.\"%V_F);\n", + "\n", + "#Negative half-cycle:\n", + "print(\"During the negative half cycle, the diode is reverse biased and hence behaves as an open circuit.\");\n", + "Vout_peak=RL*(-Vin_peak)/(R/1000+RL);\n", + "print(\"Therefore, Vout_peak=%.2fV.\"%Vout_peak);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "During the positive half cycle, the diode is foward biased and can be replaced by battery of 0.7V.\n", + "Therefore, Vout=0.7V.\n", + "During the negative half cycle, the diode is reverse biased and hence behaves as an open circuit.\n", + "Therefore, Vout_peak=-8.33V.\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.12 : Page number 491" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sin\n", + "from math import pi\n", + "V_biasing=10.0; #Biasing voltage, V\n", + "vin=[30*sin(t/10.0) for t in range(0,(int)(2*pi*10))] #input voltage waveform, V\n", + "p=plot(vin);\n", + "xlabel('t-->');\n", + "ylabel('Vin(V)');\n", + "title('Input waveform');\n", + "show(p);\n", + "vout=[]; #Output voltage waveform, V\n", + "for v in vin[:]:\n", + " if(v-V_biasing)>0 : #Diode is forward biased.\n", + " vout.append(v-V_biasing);\n", + " else: #Diode is reverse biased.\n", + " vout.append(0);\n", + " \n", + "p=plot(vout);\n", + "xlabel('t-->');\n", + "ylabel('Vout(V)');\n", + "title('Output waveform');\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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OH4bixXWnETpt3w49eqjfhWJ5OnRBPxmTEMLOmjSBWrVA1pKK99+H554zT4Eo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\nTt+QhXRCCOEQWorEmDFj2L9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VJTsFkTFJKwGTyYSkpCS0atVKyvuzBLQjKAhYt052CiJjkjodJISQ9t4sAe3g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\nBIiIDOz/AUzB4hO0oBxxAAAAAElFTkSuQmCC\n", + "text": [ + "<matplotlib.figure.Figure at 0x7f15a23a9e90>" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.13 : Page number 492" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "Vin=[]; #Input voltage waveform, V\n", + "t1=50; #Assumed time interval, s\n", + "t2=100; #Assumed time interval, s\n", + "V_biasing=10; #Biasing voltage, V\n", + "for t in range(0,151): #time interval from 0s to 151s\n", + " if(t<=t1): \n", + " Vin.append(15); #Value of input voltage for time 0 to t1 seconds \n", + " elif(t<=t2 and t>t1):\n", + " Vin.append(-30); #Value of input voltage for time t1 to t2 seconds\n", + " else :\n", + " Vin.append(15); #Value of input voltage after t2 seconds\n", + "\n", + "p=plot(Vin);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,160])\n", + "limit.set_ylim([-35,20])\n", + "xlabel('t-->');\n", + "ylabel('Vin(V)');\n", + "title('Input waveform');\n", + "show(p);\n", + "\n", + "vout=[]; #Output voltage waveform, V\n", + "for v in Vin[:]: #Loop iterating input voltage \n", + " if(v<=0):\n", + " vout.append(0); #Diode reverse biased\n", + " else:\n", + " vout.append(v-V_biasing); #Diode forward biased\n", + "\n", + "p=plot(vout);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,160])\n", + "limit.set_ylim([-35,20])\n", + "xlabel('t-->');\n", + "ylabel('Vout(V)');\n", + "title('Output waveform');\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f15a25d35d0>" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f15a2496cd0>" + ] + } + ], + "prompt_number": 37 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.14 : Page number 492-493" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "Vin=[]; #Input voltage waveform, V\n", + "t1=50; #Assumed time interval, s\n", + "t2=100; #Assumed time interval, s\n", + "V_biasing=5; #Biasing voltage, V\n", + "for t in range(0,151): #time interval from 0s to 151s\n", + " if(t<=t1): \n", + " Vin.append(10); #Value of input voltage for time 0 to t1 seconds \n", + " elif(t<=t2 and t>t1):\n", + " Vin.append(-10); #Value of input voltage for time t1 to t2 seconds\n", + " else :\n", + " Vin.append(0);\n", + " \n", + "p=plot(Vin);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,101])\n", + "limit.set_ylim([-20,20])\n", + "xlabel('t-->');\n", + "ylabel('Vin(V)');\n", + "title('Input waveform');\n", + "show(p);\n", + "\n", + "vout=[]; #Output voltage waveform, V\n", + "for v in Vin[:]: #Loop iterating input voltage \n", + " if(v<=0):\n", + " vout.append(v); #Diode reverse biased\n", + " else:\n", + " vout.append(v-V_biasing); #Diode forward biased\n", + "\n", + "p=plot(vout);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,101])\n", + "limit.set_ylim([-20,20])\n", + "xlabel('t-->');\n", + "ylabel('Vout(V)');\n", + "title('Output waveform');\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f4f12c80dd0>" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.15 : Page number 493" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "Vin=[]; #Input voltage waveform, V\n", + "t1=50; #Assumed time interval, s\n", + "t2=100; #Assumed time interval, s\n", + "V_D1=0.6; #Forward Biasing voltage of the 1st diode, V\n", + "V_D2=0.6; #Forward Biasing voltage of the 2nd diode, V\n", + "for t in range(0,151): #time interval from 0s to 151s\n", + " if(t<=t1): \n", + " Vin.append(10); #Value of input voltage for time 0 to t1 seconds \n", + " elif(t<=t2 and t>t1):\n", + " Vin.append(-10); #Value of input voltage for time t1 to t2 seconds\n", + " else :\n", + " Vin.append(0);\n", + " \n", + "p=plot(Vin);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,110])\n", + "limit.set_ylim([-20,20])\n", + "xlabel('t-->');\n", + "ylabel('Vin(V)');\n", + "title('Input waveform');\n", + "show(p);\n", + "\n", + "vout=[]; #Output voltage waveform, V\n", + "for v in Vin[:]: #Loop iterating input voltage \n", + " if(v<=0):\n", + " vout.append(-V_D1); #Diode D1 forward biased, \n", + " else:\n", + " vout.append(V_D2); #Diode D2 forward biased\n", + "\n", + "p=plot(vout);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,110])\n", + "limit.set_ylim([-1,1])\n", + "xlabel('t-->');\n", + "ylabel('Vout(V)');\n", + "title('Output waveform');\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f15a2417c90>" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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agIAA4+vra4KDg83KlSur7N+zzz5runbtanr06GFSU1PdVjcnuAEALBrsUBIA\noG4QDAAAC4IBAGBBMAAALAgGAIAFwQAAsCAYgBo6d+6c3njjDXeXAdQ6ggGoocLCQr3++usutwUa\nCoIBqKE5c+bo6NGjiomJ0ZNPPlll2zvvvFN33HGHNm/erNLS0nqqEKgZznwGauj48eMaPXq0Dhw4\n4FL7Xbt2aeXKldqzZ48mTJigqVOnqmvXrnVcJfDTccQA1NBP/UwVGxurVatWae/evZKk8PBwbdiw\noS5KA64LwQDUgrlz5yomJkZ9+vTR5cuXFR0drZiYGM2fP9/Z5sKFC1q9erXuuusu7dixQ8uWLdOw\nYcPcVzRQCYaSgBo6c+aMbrnlFmVnZ1fb9sknn9S6des0evRoTZs2Tb179677AoEaIhiA63Dffffp\n888/1+23367nn3++0nbbtm1TfHy8mjRpUo/VATVDMAAALJhjAABYEAwAAAuCAQBgQTAAACwIBgCA\nBcEAALAgGAAAFgQDAMDi/wAfN3vR+U6XwgAAAABJRU5ErkJggg==\n", + "text": [ + "<matplotlib.figure.Figure at 0x7f15a23368d0>" + ] + } + ], + "prompt_number": 42 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.16 : Page number 493-494" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "from math import sin\n", + "from math import pi\n", + "\n", + "VZ=20; #Assumed zener voltage, V\n", + "VF=0.7; #Assumed forward biasing voltage of the zener diode, V\n", + "Vin=[]; #Input voltage waveform, V\n", + "for t in range(0,(int)(2*pi*10)): #time interval from 0s to 151s\n", + " Vin.append(30*sin(t/10.0));\n", + " \n", + "p=plot(Vin);\n", + "xlabel('t-->');\n", + "ylabel('Vin(V)');\n", + "title('Input waveform');\n", + "show(p);\n", + "\n", + "vout=[]; #Output voltage waveform, V\n", + "for v in Vin[:]: #Loop iterating input voltage \n", + " if(v<=-VF):\n", + " vout.append(-VF); #Zener diode forward biased, \n", + " elif(v>=VZ):\n", + " vout.append(VZ); #Input voltage exceeds zener voltage\n", + " else:\n", + " vout.append(v); #Zener diode reverse biased\n", + "\n", + "p=plot(vout);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,80])\n", + "limit.set_ylim([-1,40])\n", + "xlabel('t-->');\n", + "ylabel('Vout(V)');\n", + "title('Output waveform');\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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OH4bixXWnETpt3w49eqjfhWJ5OnRBPxmTEMLOmjSBWrVA1pKK99+H554zT4Eo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\nTt+QhXRCCOEQWorEmDFj2L9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+ "text": [ + "<matplotlib.figure.Figure at 0x7f15a232f110>" + ] + } + ], + "prompt_number": 54 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 18.17 : Page number 494" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "from math import sin\n", + "from math import pi\n", + "\n", + "VZ1=20; #Assumed zener voltage, V\n", + "VF1=0.7; #Assumed forward biasing voltage of the zener diode, V\n", + "VZ2=20; #Assumed zener voltage, V\n", + "VF2=0.7; #Assumed forward biasing voltage of the zener diode, V\n", + "Vin=[]; #Input voltage waveform, V\n", + "for t in range(0,(int)(2*pi*10)): #time interval from 0s to 151s\n", + " Vin.append(30*sin(t/10.0));\n", + " \n", + "p=plot(Vin);\n", + "xlabel('t-->');\n", + "ylabel('Vin(V)');\n", + "title('Input waveform');\n", + "show(p);\n", + "\n", + "vout=[]; #Output voltage waveform, V\n", + "for v in Vin[:]: #Loop iterating input voltage \n", + " if(v<=-(VZ1+VF2)):\n", + " vout.append(-(VZ1+VF2)); #Zener diode forward biased, \n", + " elif(v>=VZ2+VF1):\n", + " vout.append(VZ2+VF1); #Input voltage exceeds zener voltage\n", + " else:\n", + " vout.append(v); #Zener diode reverse biased\n", + "\n", + "p=plot(vout);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,80])\n", + "limit.set_ylim([-40,40])\n", + "xlabel('t-->');\n", + "ylabel('Vout(V)');\n", + "title('Output waveform');\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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OH4bixXWnETpt3w49eqjfhWJ5OnRBPxmTEMLOmjSBWrVA1pKK99+H554zT4Eo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\nTt+QhXRCCOEQWorEmDFj2L9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\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter19_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter19_1.ipynb new file mode 100644 index 00000000..5c74053c --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter19_1.ipynb @@ -0,0 +1,1666 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:e80dba2d461291c68fb06b32e702542441b6f13e4e124da0b4826c1be4471e9c" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 19 : FIELD EFFECT TRANSISTORS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.1 : Page number 515\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_DSS=12.0; #Shorted gate drain current, mA\n", + "V_GS_off=-5.0; #Gate-source cut-off voltage, V\n", + "\n", + "#Result\n", + "print(\"ID=%d[1 + VGS/%d]\u00b2mA.\"%(I_DSS,abs(V_GS_off)));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "ID=12[1 + VGS/5]\u00b2mA.\n" + ] + } + ], + "prompt_number": 40 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.2 : Page number 515\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_DSS=32.0; #Shorted gate drain current, mA\n", + "V_GS_off=-8.0; #Gate-source cut-off voltage, V\n", + "V_GS=-4.5; #Gate-source voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "I_D=I_DSS*(1-(V_GS/V_GS_off))**2; #Drain current mA\n", + "\n", + "#Result\n", + "print(\"The drain current=%.2fmA.\"%I_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The drain current=6.12mA.\n" + ] + } + ], + "prompt_number": 41 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.3 : Page number 515\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "I_DSS=10.0; #Shorted gate drain current, mA\n", + "V_GS_off=-6.0; #Gate-source cut-off voltage, V\n", + "I_D=5.0; #Drain current mA\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#Since, I_D=I_DSS*[1 - (V_GS/V_GS_off)]\u00b2\n", + "V_GS=V_GS_off*(1-sqrt(I_D/I_DSS)); #Gate-source voltage, V\n", + "\n", + "#(ii)\n", + "V_P=-V_GS_off; #Pinch-off voltage, V \n", + "\n", + "#Result\n", + "print(\"(i) VGS=%.2fV.\"%V_GS);\n", + "print(\"(ii) VP=%dV\"%V_P);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) VGS=-1.76V.\n", + "(ii) VP=6V\n" + ] + } + ], + "prompt_number": 42 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.4 : Page number 515-516\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GS_off=-4.0; #Gate-source cut-off voltage, V\n", + "I_DSS=12.0; #Shorted gate drain current, mA\n", + "R_D=560.0; #Drain resistor, \u03a9\n", + "\n", + "#Calculation\n", + "V_P=-V_GS_off; #Pinch-off voltage, V\n", + "V_DS=V_P; #Minimum drain-source voltage for JFET to be in constant current region, V\n", + "I_D=I_DSS; #Maximum drain current, mA (V_GS=0)\n", + "V_RD=(I_D/1000)*R_D; #Voltage across drain resistor, V (OHM's LAW)\n", + "V_DD=V_DS+V_RD; #Minimum value of supply voltage to drain, V\n", + "\n", + "#Result\n", + "print(\"The minimum value of VDD required =%.2fV.\"%V_DD);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The minimum value of VDD required =10.72V.\n" + ] + } + ], + "prompt_number": 43 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.5 : Page number 516\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_DSS=3.0; #Shorted gate drain current, mA\n", + "V_GS_off=-6.0; #Gate-source cut-off voltage, V\n", + "V_GS=-2.0; #Gate-source voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "I_D=I_DSS*(1-(V_GS/V_GS_off))**2; #Drain current mA\n", + "\n", + "#Result\n", + "print(\"The drain current=%.2fmA.\"%I_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The drain current=1.33mA.\n" + ] + } + ], + "prompt_number": 44 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.6 : Page number 516" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VGS_off=4; #Gate-source cut-off voltage, V\n", + "VGS=6; #Gate source voltage, V\n", + "\n", + "print(\"p-channel JFET requires a positive gate-to-source voltage to pass drain current.\");\n", + "print(\"More positive voltage, the less the drain current. \");\n", + "print(\"Any further increase in VGS keeps the JFET cut-off. Therefore, ID=0A.\");" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "p-channel JFET requires a positive gate-to-source voltage to pass drain current.\n", + "More positive voltage, the less the drain current. \n", + "Any further increase in VGS keeps the JFET cut-off. Therefore, ID=0A.\n" + ] + } + ], + "prompt_number": 45 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.7 : Page number 517-518\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GS=15.0; #Gate-source voltage, V\n", + "I_G=1e-03; #Gate current, \u03bcA\n", + "\n", + "#Calculation\n", + "R_GS=(V_GS/(I_G*10**-6))/10**6; #Gate to source resistance, M\u03a9 (OHM's LAW)\n", + "\n", + "#Result\n", + "print(\"The gate to source resistance=%dM\u03a9.\"%R_GS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The gate to source resistance=15000M\u03a9.\n" + ] + } + ], + "prompt_number": 47 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.8 : Page number 518\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "V_GS_max=-3.1; #Maximum gate to source voltage, V\n", + "V_GS_min=-3.0; #Minimum gate to source voltage, V\n", + "I_D_max=1.3; #Maximum drain current, mA\n", + "I_D_min=1.0; #Minimum drain current, mA\n", + "\n", + "\n", + "#Calculation\n", + "delta_V_GS=abs(V_GS_max-V_GS_min); #Change in gate to source voltage, V\n", + "delta_I_D=I_D_max-I_D_min; #Change in drain current, mA\n", + "g_fs=(delta_I_D/delta_V_GS)*1000; #Transconductance, \u03bc mho\n", + "\n", + "\n", + "#Result\n", + "print(\"Transconductance=%.0f \u03bc mho\"%g_fs);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Transconductance=3000 \u03bc mho\n" + ] + } + ], + "prompt_number": 50 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.9 : Page number 518\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GS=[0,0,-0.2]; #Readings of Gate-source voltage, V\n", + "V_DS=[7,15,15]; #Readings of Drain-source voltage, V\n", + "ID=[10,10.25,9.65]; #Readings of drain current, mA\n", + "\n", + "\n", + "#Displaying the readings:\n", + "print(\"VGS= %dV %dV %.1fV\"%(V_GS[0],V_GS[1],V_GS[2]));\n", + "print(\"VDS= %dV %dV %dV\"%(V_DS[0],V_DS[1],V_DS[2]));\n", + "print(\"ID = %dV %.2fV %.2fV\"%(ID[0],ID[1],ID[2]));\n", + "\n", + "#Calculations\n", + "#(i)\n", + "#V_GS constant at 0V,\n", + "delta_VDS=V_DS[1]-V_DS[0]; #Change in drain-source voltage, V\n", + "delta_ID=ID[1]-ID[0]; #Change in drain current, mA\n", + "rd=delta_VDS/delta_ID; #a.c drain resistance, k\u03a9\n", + "\n", + "#(ii)\n", + "#V_DS constant at 15V,\n", + "delta_VGS=V_GS[2]-V_GS[1]; #Change in gate-source voltage, V\n", + "delta_ID=ID[2]-ID[1]; #Change in drain current, mA\n", + "g_fs=round((delta_ID/delta_VGS)*1000,); #Transconductance, \u03bc mho\n", + "\n", + "#(iii)\n", + "amplification_factor=rd*1000*g_fs*10**-6; #Amplification factor\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The a.c drain resistance=%dk\u03a9.\"%rd);\n", + "print(\"(ii) The transconductance=%d \u03bc mho.\"%g_fs);\n", + "print(\"(iii) The amplification factor=%d.\"%amplification_factor );\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "VGS= 0V 0V -0.2V\n", + "VDS= 7V 15V 15V\n", + "ID = 10V 10.25V 9.65V\n", + "(i) The a.c drain resistance=32k\u03a9.\n", + "(ii) The transconductance=3000 \u03bc mho.\n", + "(iii) The amplification factor=96.\n" + ] + } + ], + "prompt_number": 53 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.10 : Page number 519\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "g_mo=4000.0; #Maximum transconductance, \u03bcS\n", + "V_GS=-3.0; #Gate to source voltage, V\n", + "V_GS_off=-8.0; #Gate-source cut-off voltage, V\n", + "\n", + "#Calculation\n", + "g_m=g_mo*(1-(V_GS/V_GS_off)); #Transconductance, \u03bcS\n", + "\n", + "#Result\n", + "print(\"The transconductance=%d \u03bcS.\"%g_m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The transconductance=2500 \u03bcS.\n" + ] + } + ], + "prompt_number": 54 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.11 : Page number 519\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "g_mo=5000.0; #Maximum transconductance, \u03bcS\n", + "V_GS=-4.0; #Gate to source voltage, V\n", + "V_GS_off=-6.0; #Gate-source cut-off voltage, V\n", + "I_DSS=3.0; #Shorted-gate drain current, mA\n", + "\n", + "#Calculation\n", + "g_m=g_mo*(1-(V_GS/V_GS_off)); #Transconductance, \u03bcS\n", + "I_D=(I_DSS*(1-(V_GS/V_GS_off))**2)*1000; #Drain current \u03bcA\n", + "\n", + "\n", + "#Result\n", + "print(\"The transconductance=%.0f \u03bcS.\"%g_m);\n", + "print(\"The drain current=%d \u03bcA.\"%I_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The transconductance=1667 \u03bcS.\n", + "The drain current=333 \u03bcA.\n" + ] + } + ], + "prompt_number": 55 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.12 : Page number 520\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GS_off=-8.0; #Gate-source cut-off voltage, V\n", + "I_DSS=16.0; #Shorted-gate drain current, mA\n", + "R_D=2.2; #Drain resistor, k\u03a9\n", + "R_G=1.0; #Gate resistor, M\u03a9\n", + "V_DD=10.0; #Drain supply voltage, V\n", + "V_GG=-5.0; #Gate supply voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "V_GS=V_GG; #Gate-source voltage, V\n", + "I_D=I_DSS*(1-(V_GS/V_GS_off))**2; #Drain current \u03bcA\n", + "V_DS=V_DD-I_D*R_D; #Drain-source voltage, V (Kirchhoff's voltage law)\n", + "\n", + "#Result\n", + "print(\"The gate-source voltage=%dV.\"%V_GS);\n", + "print(\"The drain current=%.2fmA.\"%I_D);\n", + "print(\"The drain-source voltage=%.2fV.\"%V_DS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The gate-source voltage=-5V.\n", + "The drain current=2.25mA.\n", + "The drain-source voltage=5.05V.\n" + ] + } + ], + "prompt_number": 56 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.13 : Page number 521\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_D=5.0; #Drain current mA\n", + "V_DD=15.0; #Drain supply voltage, V\n", + "V_G=0; #Gate voltage, V\n", + "R_D=1.0; #Drain resistor, k\u03a9\n", + "R_S=470.0; #Source resistor, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "V_S=(I_D/1000)*R_S; #Source voltage, V (OHM's LAW)\n", + "V_D=V_DD-I_D*R_D; #Drain voltage, V (Kirchhoff's voltage law)\n", + "V_DS=V_D-V_S; #Drain-source voltage, V\n", + "V_GS=V_G-V_S; #Gate-source voltage, V\n", + "\n", + "#Result\n", + "print(\"The drain-source voltage=%.2fV.\"%V_DS);\n", + "print(\"The gate-source voltage=%.2fV.\"%V_GS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The drain-source voltage=7.65V.\n", + "The gate-source voltage=-2.35V.\n" + ] + } + ], + "prompt_number": 57 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.14 : Page number 521\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GS=-5.0; #Gate-source voltage, V\n", + "I_D=6.25; #Drain current mA\n", + "\n", + "\n", + "#Calculation\n", + "R_S=abs(V_GS/(I_D/1000)); #Required source resistor, \u03a9 (OHM's LAW)\n", + "\n", + "#Result\n", + "print(\"The required source resistor=%d \u03a9.\"%R_S);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The required source resistor=800 \u03a9.\n" + ] + } + ], + "prompt_number": 58 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.15 : Page number : 521\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_DSS=25.0; #Shorted gate drain current, mA\n", + "V_GS_off=15.0; #Gate-source cut-off voltage, V\n", + "V_GS=5.0; #Gate-source voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "I_D=I_DSS*(1-(V_GS/V_GS_off))**2; #Drain current mA\n", + "R_S=V_GS/(I_D/1000); #Required source resistor, \u03a9 (OHM's LAW)\n", + "\n", + "\n", + "#Result\n", + "print(\"The source resistance=%.0f\u03a9.\"%R_S);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The source resistance=450\u03a9.\n" + ] + } + ], + "prompt_number": 59 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.16 : Page number 522\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_DSS=15.0; #Shorted gate drain current, mA\n", + "V_GS_off=-8.0; #Gate-source cut-off voltage, V\n", + "V_DD=12.0; #Drain supply voltage,V\n", + "V_D=V_DD/2; #Drain voltage(half of V_DD), V\n", + "\n", + "#Calculation\n", + "I_D=I_DSS/2; #Drain current(approximately half of I_DSS), mA\n", + "V_GS=V_GS_off/3.4; #Gate-source voltage, V\n", + "R_S=abs(V_GS/(I_D/1000)); #Source resistor, \u03a9 (OHM's LAW)\n", + "#Since,V_D=V_DD-I_D*R_D; \n", + "R_D=(V_DD-V_D)/(I_D/1000); #Drain resistor, \u03a9 (OHM's LAW)\n", + "\n", + "#Result\n", + "print(\" RS=%d \u03a9 and RD=%d \u03a9.\"%(R_S,R_D));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " RS=313 \u03a9 and RD=800 \u03a9.\n" + ] + } + ], + "prompt_number": 60 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.17 : Page number 522\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "I_DSS=5.0; #Shorted gate drain current, mA\n", + "V_GS_off=-2.0; #Gate-source cut-off voltage, V\n", + "V_DS=10.0; #Drain-source voltage,V\n", + "I_D=1.5; #Drain current, mA\n", + "V_DD=20.0; #Drain supply voltage,V\n", + "V_G=0; #Gate voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "#Since, Drain current, I_D=I_DSS*(1-(V_GS/V_GS_off))**2; \n", + "V_GS=V_GS_off*(1-sqrt(I_D/I_DSS)); #Gate-source voltage, V\n", + "\n", + "#Since, V_GS=V_G-V_S,\n", + "V_S=V_G-V_GS; #Source voltage, V\n", + "\n", + "R_S=V_S/I_D; #Source resistor, k\u03a9\n", + "\n", + "#Since, V_DD=I_D*R_D +V_DS+ I_D*R_S,\n", + "R_D=(V_DD-I_D*R_S-V_DS)/I_D; #Drain resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "print(\"The source resistance=%.1f k\u03a9\"%R_S);\n", + "print(\"The drain resistance=%d k\u03a9.\"%R_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The source resistance=0.6 k\u03a9\n", + "The drain resistance=6 k\u03a9.\n" + ] + } + ], + "prompt_number": 61 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.18 : Page number 522-523\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_DD=30.0; #Drain supply voltage, V\n", + "R_D=5.0; #Drain resistor, k\u03a9\n", + "I_D=2.5; #Drain current, mA\n", + "R_S=200.0; #Source resistor, \u03a9\n", + "\n", + "#Calculation\n", + "#(i)\n", + "V_DS=V_DD-I_D*(R_D+(R_S/1000)); #Drain-source voltage, V\n", + "\n", + "#(ii)\n", + "V_GS=-(I_D/1000)*R_S; #Gate-source voltage, V\n", + "\n", + "#Result\n", + "print(\"The drain-source voltage=%dV.\"%V_DS);\n", + "print(\"The gate-source voltage=%.1fV.\"%V_GS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The drain-source voltage=17V.\n", + "The gate-source voltage=-0.5V.\n" + ] + } + ], + "prompt_number": 62 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.19 : Page number 523" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "ID_1=2.15; #First stage drain current, mA\n", + "ID_2=9.15; #Second stage drain current, mA\n", + "VDD=30; #Drain supply voltage, V\n", + "RS_1=0.68; #Source resistance of 1st stage, k\u03a9\n", + "RS_2=0.22; #Source resistance of 2nd stage, k\u03a9\n", + "RD_1=8.2; #Drain resistor of 1st stage, k\u03a9\n", + "RD_2=2; #Drain resistor of 2nd stage, k\u03a9\n", + "\n", + "#Calculation\n", + "V_RD1=ID_1*RD_1; #Voltage drop across 8.2k\u03a9\n", + "VD_1=VDD-V_RD1; #Drain voltage of 1st stage, V\n", + "VS_1=ID_1*RS_1; #D.C potential of source of first stage, V\n", + "V_RD2=ID_2*RD_2; #Voltage drop across 2k\u03a9\n", + "VD_2=VDD-V_RD2; #Drain voltage of 2nd stage, V\n", + "VS_2=ID_2*RS_2; #D.C potential of source of 2nd stage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"drain voltage of 1st stage=%.2fV.\"%VD_1);\n", + "print(\"Source voltage of 1st stage=%.2fV.\"%VS_1);\n", + "print(\"drain voltage of 2nd stage=%.1fV.\"%VD_2);\n", + "print(\"Source voltage of 2nd stage=%.2fV.\"%VS_2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "drain voltage of 1st stage=12.37V.\n", + "Source voltage of 1st stage=1.46V.\n", + "drain voltage of 2nd stage=11.7V.\n", + "Source voltage of 2nd stage=2.01V.\n" + ] + } + ], + "prompt_number": 63 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.20 : Page number 524" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=12; #Drain supply voltage, V\n", + "VD=7; #Drain voltage, V\n", + "R1=6.8; #Resistor R1, M\u03a9\n", + "R2=1; #Resistor R2, M\u03a9\n", + "RS=1.8; #Source resistance, k\u03a9\n", + "RD=3.3; #Drain resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "ID=(VDD-VD)/RD; #Second stage drain current, mA\n", + "VS=ID*RS; #Source voltage, V\n", + "VG=VDD*R2/(R1+R2); #Drain voltage, V\n", + "VGS=VG-VS; #Drain-source voltage, V\n", + "\n", + "#Calculation\n", + "print(\"Drain current=%.2fmA.\"%ID);\n", + "print(\"Gate-source voltage=%.1fV.\"%VGS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Drain current=1.52mA.\n", + "Gate-source voltage=-1.2V.\n" + ] + } + ], + "prompt_number": 65 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.21 : Page number 524-525" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "VDD=30; #Drain supply voltage, V\n", + "ID=2.5; #Drain current, mA\n", + "VDS=8; #Drain-source voltage, V\n", + "VGS_off=-5; #Gate-source cutoff voltage, V\n", + "R1=1; #Resistor R1, M\u03a9\n", + "R2=500; #Resistor R2, k\u03a9\n", + "IDSS=10; #Shorted gate drain current, mA\n", + "\n", + "#Calculation\n", + "#ID=IDSS*square_of(1-(VGS/VGS_off))\n", + "VGS=VGS_off*(1-sqrt(ID/IDSS)); #Gate-source voltage, V\n", + "V2=VDD*R2/(R1*1000+R2); #Voltage across R2, V\n", + "\n", + "\n", + "#V2=VGS+ID*RS\n", + "RS=(V2-VGS)/ID; #Source resistor, k\u03a9\n", + "\n", + "#Result\n", + "print(\"Source resistor, RS=%dk\u03a9.\"%RS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Source resistor, RS=5k\u03a9.\n" + ] + } + ], + "prompt_number": 66 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "\n", + "Example 19.22 : Page number 528-529\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=20.0; #Drain supply voltage, V\n", + "RS=50.0; #Source resistor, \u03a9\n", + "RD=150.0; #Drain resistor, \u03a9\n", + "\n", + "#Calculation\n", + "VDS_max=VDD; #Maximum drain source voltage, V\n", + "ID_max=(VDD/(RD+RS))*1000; #Maximum drain current, mA\n", + "\n", + "\n", + "#plot\n", + "x=[i for i in range(0,(int)(VDS_max+1))]; #Plot variable for V_DS\n", + "y=[(i/(RD+RS))*1000 for i in reversed(x[:])]; #Plot variable for ID\n", + "p=plot(x,y);\n", + "xlabel(\"VDS(V)\");\n", + "ylabel(\"ID(mA)\");\n", + "title(\"d.c load line\");\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7fafb8158f50>" + ] + } + ], + "prompt_number": 68 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.23 : Page number 529" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=20; #Drain supply voltage, V\n", + "RD=500.0; #Drain resistor, \u03a9\n", + "\n", + "#Calculation\n", + "VDS_max=VDD; #Maximum drain source voltage, v \n", + "ID_max=(VDD/RD)*1000; #Maximum drain current, mA\n", + "\n", + "#Plot\n", + "x=[i for i in range(0,(int)(VDS_max+1))]; #Plot variable for V_DS\n", + "y=[(i/RD)*1000 for i in reversed(x[:])]; #Plot variable for ID\n", + "p=plot(x,y);\n", + "xlabel(\"VDS(V)\");\n", + "ylabel(\"ID(mA)\");\n", + "title(\"d.c load line\");\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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7MASIawVEtlPU5iCivuAeRETSYwiQ4rWvFaSnc62AyNEYAqQKggAsX85WQORoDAFSFe5B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\nJ598IvdILkUQBL5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+ "text": [ + "<matplotlib.figure.Figure at 0x7fafb804f310>" + ] + } + ], + "prompt_number": 71 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.24 : Page number 530-531" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=20; #Drain supply voltage, V\n", + "RD=12.0; #Drain resistor, k\u03a9\n", + "RL=8.0; #Load resistor, k\u03a9\n", + "RG=1.0; #Gate resistor, M\u03a9\n", + "gm=1.0; #transconductance, mA/V\n", + "\n", + "#Calculation\n", + "gm=gm*10**-3; #transconductance, mho\n", + "RAC=(RD*RL)/(RD+RL); #Total a.c load, k\u03a9\n", + "Av=gm*RAC*1000; #Voltage gain\n", + "\n", + "\n", + "#Result\n", + "print(\"Voltage gain=%.1f.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain=4.8.\n" + ] + } + ], + "prompt_number": 73 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.25 : Page number 531" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "gm=3000; #transconductance, \u03bcmho\n", + "RD=10; #Drain resistance, k\u03a9\n", + "\n", + "#Calculation\n", + "Av=gm*10**-6*RD*1000; #Voltage gain\n", + "\n", + "#Result\n", + "print(\"Voltage gain=%d.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain=30.\n" + ] + } + ], + "prompt_number": 74 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.26 : Page number 531" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "IDSS=8; #Shorted gate drain current, mA\n", + "VGS_off=-10; #Gate-source cut-off voltage, V\n", + "ID=1.9; #Drain current, mA\n", + "RD=3.3; #Drain resistance, k\u03a9\n", + "RS=2.7; #Source resistor, k\u03a9\n", + "vin=100; #Input voltage, mV\n", + "\n", + "#Calculation\n", + "VGS=-ID*RS; #Gate-source voltage, V\n", + "gmo=2*IDSS*10**-3/abs(VGS_off); #Maximum transconductance, S\n", + "gm=gmo*(1-(VGS/VGS_off)); #Transconductance, S\n", + "Av=gm*RD*1000; #Voltage gain\n", + "vout=Av*vin; #Output voltage, mA\n", + "\n", + "#Result\n", + "print(\"Output voltage=%dmV(r.m.s).\"%vout);\n", + " \n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=257mV(r.m.s).\n" + ] + } + ], + "prompt_number": 76 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.27 : Page number 531-532" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RL=4.7; #Load resistor, \u03a9\n", + "RD=3.3; #Drain resistance, k\u03a9\n", + "gm=779*10**-6; #Transconductance, S\n", + "vin=100; #Input voltage, mV\n", + "\n", + "\n", + "#Calculation\n", + "RAC=RD*RL/(RD+RL); #Total a.c drain resistance, k\u03a9\n", + "Av=gm*RAC*1000; #Voltage gain\n", + "vout=Av*vin; #Output voltage, mA\n", + "\n", + "#Result\n", + "print(\"Output voltage=%dmV(r.m.s).\"%vout);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=151mV(r.m.s).\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.28 : Page number 532-533" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RD=1.5; #Drain resistance, k\u03a9\n", + "gm=4; #Transconductance, mS\n", + "RS=560; #Source resistance, \u03a9\n", + "\n", + "#Calculation\n", + "Av=gm*10**-3*RD*1000/(1+gm*10**-3*RS);\n", + "print(\"Voltage gain=%.2f.\"%Av);\n", + "\n", + "#If RS is bypassed by a capacitor\n", + "Av=gm*10**-3*RD*1000;\n", + "print(\"Voltage gain, if RS resistor is bypassed=%d.\"%Av);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain=1.85.\n", + "Voltage gain, if RS resistor is bypassed=6.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.29 : Page number 533" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "from math import sqrt\n", + "\n", + "IDSS=10; #Shorted gate drain current, mA\n", + "VGS_off=-3.5; #Gate-source cut-off voltage, V\n", + "RD=1.5; #Drain resistance, k\u03a9\n", + "RS=750; #Source resistance, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#From d.c biasing\n", + "ID=2.3; #Drain current, mA\n", + "VGS=round(VGS_off*(1-sqrt(ID/IDSS)),1); #Gate-source voltage, V\n", + "gm=round(round((2*IDSS/abs(VGS_off)),1)*round((1-(VGS/VGS_off)),3),2); #Transconductance, mS\n", + "\n", + "\n", + "#(i)\n", + "Av=gm*RD; #Voltage gain with RS resistor bypassed\n", + "print(\"(i) Voltage gain with RS bypassed=%.3f.\"%Av);\n", + "\n", + "#(ii)\n", + "Av=Av/(1+gm*(RS/1000.0));\n", + "print(\"(ii) Voltage gain with RS unbypassed=%.2f.\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Voltage gain with RS bypassed=4.155.\n", + "(ii) Voltage gain with RS unbypassed=1.35.\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.30 : Page number 539-540" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "IDSS=10.0; #Shorted gate drain current, mA\n", + "VGS_off=-8.0; #Gate-source cut-off voltage, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "if(VGS_off<0):\n", + " print(\"(i) n-channel D-MOSFET\");\n", + "else:\n", + " print(\"(i) p-channel D-MOSFET\");\n", + " \n", + "\n", + "#(ii)\n", + "VGS=-3.0; #Gate-source voltage, V\n", + "ID=IDSS*(1-(VGS/VGS_off))**2; #Drain current mA\n", + "print(\"(ii) Drain current=%.2fmA\"%ID);\n", + "\n", + "#(iii)\n", + "VGS=3.0; #Gate-source voltage, V\n", + "ID=IDSS*(1-(VGS/VGS_off))**2; #Drain current mA\n", + "print(\"(iii) Drain current=%.1fmA\"%ID);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) n-channel D-MOSFET\n", + "(ii) Drain current=3.91mA\n", + "(iii) Drain current=18.9mA\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.31 : Page number 540\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "IDSS=1.0; #Shorted gate drain current, mA\n", + "VGS_off=-6.0; #Gate-source cut-off voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "#Point 1\n", + "VGS=0; #Gate source voltage, V \n", + "ID=IDSS; #Drain current, mA\n", + "print(\"Point 1: VGS=%dV and ID=%dmA.\"%(VGS,ID));\n", + "\n", + "#Point 2\n", + "VGS=VGS_off; #Gate source voltage, V \n", + "ID=0; #Drain current, mA\n", + "print(\"Point 2: VGS=%dV and ID=%dmA.\"%(VGS,ID));\n", + "\n", + "#locating more points by changing VG values\n", + "VGS=-3; #Gate source voltage, V \n", + "ID=IDSS*(1-(VGS/VGS_off))**2; #Drain current mA\n", + "print(\"Point 3: VGS=%dV and ID=%.2fmA.\"%(VGS,ID));\n", + "\n", + "VGS=-1; #Gate source voltage, V \n", + "ID=IDSS*(1-(VGS/VGS_off))**2; #Drain current mA\n", + "print(\"Point 4: VGS=%dV and ID=%.3fmA.\"%(VGS,ID));\n", + "\n", + "VGS=1; #Gate source voltage, V \n", + "ID=IDSS*(1-(VGS/VGS_off))**2; #Drain current mA\n", + "print(\"Point 5: VGS=%dV and ID=%.2fmA.\"%(VGS,ID));\n", + "\n", + "VGS=3; #Gate source voltage, V \n", + "ID=IDSS*(1-(VGS/VGS_off))**2; #Drain current mA\n", + "print(\"Point 6: VGS=%dV and ID=%.2fmA.\"%(VGS,ID));" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Point 1: VGS=0V and ID=1mA.\n", + "Point 2: VGS=-6V and ID=0mA.\n", + "Point 3: VGS=-3V and ID=0.25mA.\n", + "Point 4: VGS=-1V and ID=0.694mA.\n", + "Point 5: VGS=1V and ID=1.36mA.\n", + "Point 6: VGS=3V and ID=2.25mA.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.32 : Page number 541" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=18; #Drain supply voltage, V\n", + "RD=620.0; #Drain resistor, \u03a9\n", + "IDSS=12.0; #Shorted gate drain current, mA\n", + "VGS_off=-8.0; #Gate-source cut-off voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "ID=IDSS; #Drain current, mA\n", + "VDS=VDD-IDSS*(RD/1000); #Drain source voltage, V\n", + "\n", + "#Result\n", + "print(\"Drain source voltage=%.1fV.\"%VDS);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Drain source voltage=10.6V.\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.33 : Page number 542" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=15; #Drain supply voltage\n", + "RD=620.0; #Drain resistor, \u03a9\n", + "RL=8.2; #Load resistor, k\u03a9\n", + "vin=500.0; #Input voltage, V\n", + "IDSS=12.0; #Shorted gate drain current, mA\n", + "gm=3.2; #Transconductance, mS\n", + "\n", + "#Calculation\n", + "#(i)\n", + "VDS=VDD-IDSS*(RD/1000.0); #Drain source voltage, V\n", + "\n", + "#(ii)\n", + "RAC=RD*RL*1000/(RD+RL*1000); #Total a.c drain resistace, \u03a9\n", + "vout=(gm/1000.0)*RAC*vin; #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"(i) Drain source voltage=%.2fV.\"%VDS);\n", + "print(\"(ii) Output voltage=%dmV\"%vout);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Drain source voltage=7.56V.\n", + "(ii) Output voltage=922mV\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.34 : Page number 545" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "ID_on=500.0; #Drain current for MOSFET ON, mA\n", + "VGS_on=10.0; #Gate-source voltage for MOSFET ON, V\n", + "VGS_th=1.0; #Threshold value of gate-source voltage, V\n", + "VGS=5; #Gate-source voltage, V\n", + "\n", + "#Calculation\n", + "K=round(ID_on/(VGS_on-VGS_th)**2,2); #Constant for a E-MOSFET, mA/V\u00b2\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "\n", + "#Result\n", + "print(\"Drain current=%.1fmA\"%ID);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Drain current=98.7mA\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.35 : Page number 545" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "ID_on=3.0; #Drain current for MOSFET ON, mA\n", + "VGS_on=10.0; #Gate-source voltage for MOSFET ON, V\n", + "VGS_th=3.0; #Threshold value of gate-source voltage, V\n", + "\n", + "#Calculation\n", + "K=round((ID_on/(VGS_on-VGS_th)**2),3); #Constant for a E-MOSFET, mA/V\u00b2\n", + "print(\"K=%.3fe-03A/V\u00b2.\"%K);\n", + "\n", + "#Determining different points for plotting\n", + "VGS=5; #Gate-source voltage, V\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "print(\"For VGS=5V, Drain current=%.3fmA\"%ID);\n", + "VGS=8; #Gate-source voltage, V\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "print(\"For VGS=8V, Drain current=%.3fmA\"%ID);\n", + "VGS=10; #Gate-source voltage, V\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "print(\"For VGS=10V, Drain current=%.dmA\"%ID);\n", + "VGS=12; #Gate-source voltage, V\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "print(\"For VGS=12V, Drain current=%.2fmA\"%ID);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "K=0.061e-03A/V\u00b2.\n", + "For VGS=5V, Drain current=0.244mA\n", + "For VGS=8V, Drain current=1.525mA\n", + "For VGS=10V, Drain current=2mA\n", + "For VGS=12V, Drain current=4.94mA\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.36 : Page number 546-547" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=24.0; #Drain supply voltage, V\n", + "RD=470.0; #Drain resistor, \u03a9\n", + "R1=100.0; #Resistor R1, k\u03a9\n", + "R2=15.0; #Resistor R2, k\u03a9\n", + "ID_on=500.0; #Drain current for MOSFET ON, mA\n", + "VGS_on=10.0; #Gate-source voltage for MOSFET ON, V\n", + "VGS_th=1.0; #Threshold value of gate-source voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "VGS=VDD*R2/(R1+R2); #Gate-source voltage, V (Voltage divider rule)\n", + "K=round((ID_on/(VGS_on-VGS_th)**2),2); #Constant for a E-MOSFET, mA/V\u00b2\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "VDS=VDD-(ID/1000)*RD; #Drain-source voltage, V\n", + "\n", + "#Result\n", + "print(\"Drain-source voltage=%.1fV.\"%VDS);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Drain-source voltage=10.8V.\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.37 : Page number 547" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=20.0; #Drain supply voltage, V\n", + "RD=1.0; #Drain resistor, k\u03a9\n", + "RG=5.0; #Gate resistor , M\u03a9\n", + "ID_on=10.0; #Drain current for MOSFET ON, mA\n", + "\n", + "#Calculation\n", + "#since, VGS=VDS\n", + "ID=ID_on; #Drain current, mA\n", + "VDS=VDD-ID*RD; #Drain-source voltage, V\n", + "\n", + "#Result\n", + "print(\"Drain current=%dmA.\"%ID);\n", + "print(\"Drain-source voltage=%dV.\"%VDS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Drain current=10mA.\n", + "Drain-source voltage=10V.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 19.38 : Page number 547-548" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VDD=10.0; #Drain supply voltage, V\n", + "RD=3.0; #Drain resistor, k\u03a9\n", + "R1=1.0; #Resistor R1, M\u03a9\n", + "R2=1.0; #Resistor R2, M\u03a9\n", + "ID_on=10.0; #Drain current for MOSFET ON, mA\n", + "VGS_on=10.0; #Gate-source voltage for MOSFET ON, V\n", + "VGS_th=1.5; #Threshold value of gate-source voltage, V\n", + "\n", + "#Calculation\n", + "K=round((ID_on/(VGS_on-VGS_th)**2),3); #Constant for a E-MOSFET, mA/V\u00b2\n", + "VGS=VDD*R2/(R1+R2); #Gate-source voltage, V (Voltage divider rule)\n", + "ID=K*(VGS-VGS_th)**2; #Drain current, mA\n", + "\n", + "#Result\n", + "print(\"Drain current=%.2fmA.\"%ID);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Drain current=1.69mA.\n" + ] + } + ], + "prompt_number": 20 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter1_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter1_1.ipynb new file mode 100644 index 00000000..49519941 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter1_1.ipynb @@ -0,0 +1,646 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:0ac98582dd0b2497034e459e869a2a3bd28001d0d4c4b37a61a8ed5d05f228e3" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 1: INTRODUCTION" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "EXAMPLE 1.1: Page Number 8" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "Eg=24.0; #Generated voltage in V\n", + "Ri=0.01; #Internal Resistance in \u03a9\n", + "P=100; #Power supplied in watts\n", + "\n", + "#Calculations\n", + "# (i)\n", + "I=P/Eg; #Load current in A\n", + "V_Ri=I*Ri; #Voltage drop in internal resistance\n", + "\n", + "# (ii)\n", + "V=Eg-(I*Ri); #Terminal Voltage\n", + "\n", + "#Results\n", + "print (\"The voltage drop in internal resistance is %.4f V\"%V_Ri);\n", + "print (\"The terminal voltage is %.2f V\"%V);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage drop in internal resistance is 0.0417 V\n", + "The terminal voltage is 23.96 V\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "EXAMPLE 1.2: Page number 10" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Eg=500.0; #Generated voltage in V\n", + "Ri=1000.0; #Internal Resistance in \u03a9\n", + "\n", + "\n", + "#Calculations\n", + "# (i)\n", + "RL=10; #Load resistance of case 1 in \u03a9 \n", + "I= Eg/(RL+Ri); #Load current in A\n", + "\n", + "print(\"The load current for RL=10\u03a9 is %.3f A\"%I);\n", + "\n", + "# (ii)\n", + "RL=50; #Load resistance of case 2 in \u03a9 \n", + "I= Eg/(RL+Ri); #Load current in A\n", + "\n", + "print(\"The load current for RL=50\u03a9 is %.3f A\"%I);\n", + "\n", + "# (iii)\n", + "RL=100; #Load resistance of case 3 in \u03a9 \n", + "I= Eg/(RL+Ri); #Load current in A\n", + "I=round(I,3);\n", + "\n", + "print(\"The load current for RL=100\u03a9 is %.3f A\"%I);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The load current for RL=10\u03a9 is 0.495 A\n", + "The load current for RL=50\u03a9 is 0.476 A\n", + "The load current for RL=100\u03a9 is 0.455 A\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.3: Page Number 11" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "E=10.0; #voltage of voltage source in V\n", + "Ri=10.0; #Internal Resistance of the voltage source in \u03a9\n", + "\n", + "#Calculation\n", + "Isc=E/Ri; #short circuit current in A\n", + "I=Isc; #Current value of current source in A\n", + "R=Ri; #Internal Resistence of the current source in \u03a9\n", + "\n", + "#Results\n", + "print(\"The current value of the current source= %d A\"%Isc);\n", + "print(\"The internal resistance of the current source =%d \u03a9 \"%R);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The current value of the current source= 1 A\n", + "The internal resistance of the current source =10 \u03a9 \n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "EXAMPLE 1.4: Page number 11-12" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I=6.0; # current value of current source in mA\n", + "Ri=2000.0; #Internal Resistance of the current source in \u03a9\n", + "\n", + "#Calcultion\n", + "V=(I/1000)*Ri; #Voltage of voltage source in V\n", + "R=Ri; #Internal resistance of voltage source in \u03a9\n", + "\n", + "#Results\n", + "print(\"The voltage of voltage source is %d V\"%V);\n", + "print(\"The internal resistance of the voltage source is %d \u03a9\"%R);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage of voltage source is 12 V\n", + "The internal resistance of the voltage source is 2000 \u03a9\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.5: Page number 13\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "E=200.0; #Generated voltage in V\n", + "Ri=100.0; #Internal Resistance of generator in \u03a9\n", + "\n", + "#Calculations\n", + "#(i)\n", + "RL=100; #Load resistance for 1st case in \u03a9\n", + "I=E/(RL+Ri); #Load current in 1st case A\n", + "P=(I*I)*RL; #Power delivered to load of 2nd case in watts\n", + "Pt=(I*I)*(Ri+RL); #Total power generated in watts\n", + "\n", + "print(\"Power delivered for RL=100\u03a9 is %d watts\"%P);\n", + "print(\"Total power generated for RL=100\u03a9 is %d watts\"%Pt);\n", + "\n", + "\n", + "#(ii)\n", + "RL=300; #Load resistance for 2nd case in \u03a9\n", + "I=E/(RL+Ri); #Load current in 2nd case in A\n", + "P=(I*I)*RL; #Power delivered to load of 2nd case in watts\n", + "Pt=(I*I)*(Ri+RL); #Total power generated in watts\n", + "\n", + "print(\"Power delivered for RL=300\u03a9 is %d watts\"%P);\n", + "print(\"Total power generated for RL=300\u03a9 is %d watts\"%Pt);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power delivered for RL=100\u03a9 is 100 watts\n", + "Total power generated for RL=100\u03a9 is 200 watts\n", + "Power delivered for RL=300\u03a9 is 75 watts\n", + "Total power generated for RL=300\u03a9 is 100 watts\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.6: Page number 14" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V=12.0; #Output from amplifier in V\n", + "R_out_eq=15; #Equivalent resistance in \u03a9\n", + "\n", + "#Calculations\n", + "RL=R_out_eq; #Load resistance in \u03a9\n", + "Rt=RL+R_out_eq; #Total resistance in \u03a9\n", + "I=V/Rt; #Circuit current in A\n", + "PL=pow(I,2)*RL; #Power delivered to load in W\n", + "\n", + "#Results\n", + "print(\"Load resistance required is = %d \u03a9\"%RL);\n", + "print(\"Power delivered to load = %.1f W\"%PL);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Load resistance required is = 15 \u03a9\n", + "Power delivered to load = 2.4 W\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.7, Page number 14" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V=50.0; #voltage from ac generator in V\n", + "R=100.0; #Resistance of internal impedance in \u03a9\n", + "XL=50.0; #inductive reactance of internal impedance in \u03a9\n", + "\n", + "#Calculation\n", + "Zi=100+(50j); #Internal impedance in complex form (\u03a9)\n", + "ZL=conjugate(Zi); #Load impedance (conjugate of internal impedance ) in \u03a9\n", + "Zt=Zi+ZL; #Total impedance in \u03a9\n", + "I=real(V/Zt); #Circuit current in A\n", + "\n", + "Max_Power=pow(I,2)*R; #Maximum power transferred to the load in watts\n", + "\n", + "\n", + "#Results\n", + "print (\"Load impedance %d %dj \u03a9\"%(real(ZL),imag(ZL)));\n", + "print(\"Maximum power transferred to the load =%.2f W\"%Max_Power);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Load impedance 100 -50j \u03a9\n", + "Maximum power transferred to the load =6.25 W\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.8: Page number 16" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Function for calculating parallel resistance\n", + "def pR(R1,R2):\n", + " return((R1*R2)/(R1+R2));\n", + "\n", + "\n", + "#Variable declaration\n", + "E=100.0; #Source voltage in V\n", + "R1=10.0; #Resistance of resistor 1 in \u03a9\n", + "R2=20.0; #Resistance of resistor 2 in \u03a9\n", + "R3=12.0; #Resistance of resistor 3 in \u03a9\n", + "R4=8.0; #Resistance of resistor 4 in \u03a9\n", + "RL=100.0; #Resistance of load in \u03a9\n", + "\n", + "#Calculation\n", + "Req=R1+pR(R3+R4,R2); #Equivalent resistance after removing RL ,in \u03a9\n", + "I=E/Req; #Total circuit current in A\n", + "I8=I*R2/(R2+R3+R4);\n", + "\n", + "#Thevenin's equivalent circuit's parameters\n", + "E0=I8*R4; #Thevenin voltage V\n", + "R0=pR(pR(R1,R2)+R3,R4); #Thevenin resistance \n", + "I_RL=E0/(R0+RL); #Load current in A \n", + "\n", + "#Result \n", + "print (\"Current through load = %.2f A.\"%I_RL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current through load = 0.19 A.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.9: Page number 17" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Function for calculating parallel resistance\n", + "def pR(R1,R2):\n", + " return((R1*R2)/(R1+R2));\n", + "\n", + "\n", + "#Variable declaration\n", + "V=20.0; #Voltage source in V\n", + "R1=1000.0; #resistance of resistor 1 in \u03a9\n", + "R2=1000.0; #resistance of resistor 2 in \u03a9\n", + "R3=1000.0; #resistance of resistor 3 in \u03a9\n", + "\n", + "#calculation\n", + "#parameter for Thevenin's equivalent circuit\n", + "E0=(V*R3)/(R1+R3); #thevenin voltage in V\n", + "R0=pR(R1,R3)+R2; #Thevenins resistance in \u03a9\n", + "\n", + "#result\n", + "print(\"The thevenin voltage = %d V\"%E0);\n", + "print(\"The thevenin resistance = %d \u03a9\"%R0);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The thevenin voltage = 10 V\n", + "The thevenin resistance = 1500 \u03a9\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.10: Page number 18" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V=120.0; #Supply voltage in V\n", + "R1=40.0; #Resistor 1's resistance in \u03a9\n", + "R2=20.0; #Resistor 2's resistance in \u03a9\n", + "R3=60.0; #Resistor 3's resistance in \u03a9\n", + "\n", + "#Calculations\n", + "#Using Thevenin's theorem, Thevenin's voltage and resistance are calculated\n", + "E0=(V*R2)/(R1+R2); #Thevenin voltage (voltage across the load resistance RL, after removing RL)in V\n", + "R0=(R1*R2)/(R1+R2) + R3; #Thevenin's resistance (Resistance between the terminals of load RL, with RL removed and source voltage shorted)in \u03a9 \n", + "RL=R0; #Value of load resistance to be connected for maximum power transfer in \u03a9\n", + "Pmax=pow(E0,2)/(4*RL); #Maximum power transferred to load in watts\n", + "\n", + "#Results\n", + "print(\"The value of load resistance RL to which maximum power will be transferred = %.2f \u03a9.\"%RL);\n", + "print(\"The maximum power transferred to load =%.2f W.\"%Pmax);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The value of load resistance RL to which maximum power will be transferred = 73.33 \u03a9.\n", + "The maximum power transferred to load =5.45 W.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.11: Page number 18-19-20" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V=80.0; #Supply voltage in V\n", + "R1=100.0; #Resistor 1's resistance in \u03a9\n", + "R2=100.0; #Resistor 2's resistance in \u03a9\n", + "R3=30.0; #Resistor 3's resistance in \u03a9\n", + "R4=80.0; #Resistor 4's resistance in \u03a9\n", + "R5=20.0; #Resistor 5's resistance in \u03a9\n", + "R6=60.0; #Resistor 6's resistance in \u03a9\n", + "R7=20.0; #Resistor 7's resistance in \u03a9\n", + "R8=50.0; #Resistor 8's resistance in \u03a9\n", + "\n", + "#Calculations\n", + "#Using Thevenin's theorem,\n", + "E0=(V*R2)/(R1+R2); #Thevenin's voltage for the circuit containing V, R1, R2 in V.\n", + "R0=(R1*R2)/(R1+R2); #Thevenin's resistance for R1, R2 in \u03a9.\n", + "\n", + "#Using Thevenin's theorem again on E0, R0 and rest of the circuit resistors.\n", + "E0_1=(E0*R4)/(R0+R3+R4); #Thevenin's voltage for the cicruit containing E0, R0, R3, R4 in V\n", + "R0_1=((R0+R3)*R4)/(R0+R3+R4); #Thevenin's resistance of R0,R3,R4 (R0 and R3 in series and both in parallel with R4), in \u03a9 \n", + "\n", + "#Using Thevenin's theorem again on E0_1, R0_1, and rest of the circuit resistors.\n", + "E0_2=(E0_1*R6)/(R0_1+R5+R6); #Thevenin's voltage for the circuit containing E0_1, R0_1, R5, R6 in V\n", + "R0_2=((R0_1+R5)*R6)/(R0_1+R5+R6); #Thevenin's resistance of R0_1,R5,R6 (R0 and R3 in series and both in parallel with R4), in \u03a9\n", + "\n", + "\n", + "I_50=E0_2/(R0_2+R7+R8); #Current through the 50 \u03a9 resistor in A\n", + "\n", + "\n", + "#Results\n", + "print(\"The current through the 50 \u03a9 resistor =%.1f A.\"%I_50);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The current through the 50 \u03a9 resistor =0.1 A.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.12: Page number 22\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "from math import floor\n", + "#Variable declaration\n", + "V=40.0; #Voltage supply in V\n", + "R1=4.0; #Resistor 1's resistance in \u03a9\n", + "R2=6.0; #Resistor 2's resistance in \u03a9\n", + "R3=5.0; #Resistor 3's resistance in \u03a9\n", + "R4=8.0; #Resistor 4's resistance in \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#Using Norton's theorem,\n", + "#calculating Norton current by removing the load resistance R4 and short circuiting those two terminals of the circuit\n", + "R=R1 + (R2*R3)/(R2+R3); #Load on source after removing R4 resistor, in \u03a9\n", + "I=V/R; #Source current in A\n", + "\n", + "#Using current dividing rule ,calculating the short circuit current.\n", + "I_N=(I*R2)/(R2+R3); #Norton's equivalent current or the short circuit current in A\n", + "\n", + "R_N=R3 + (R1*R2)/(R1+R2); #Norton's equivalent resistance in \u03a9\n", + "\n", + "I_8=(I_N*R_N)/(R_N+R4); #Current through the 8 \u03a9 resistance in A\n", + "\n", + " \n", + "\n", + "#Results\n", + "print(\"The current through the 8\u03a9 resistance =%.2f A.\"%I_8);\n", + "\n", + "#Note: The answer in the book is 1.55 A, but in the above code the approximate value is obtained, i.e not 1.55A but 1.56A\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The current through the 8\u03a9 resistance =1.56 A.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 1.13 :Page number 23\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V1=30.0; #Voltage source 1, V\n", + "V2=18.0; #Voltage source 2, V\n", + "R1=20.0; #1st resistor, \u03a9\n", + "R2=10.0; #2nd resistor, \u03a9\n", + "\n", + "\n", + "#Calculations\n", + "\n", + "#Finding Thevenin's Equivalent circuit\n", + "I=(V1-V2)/(R1+R2); #Current in the circuit, A\n", + "\n", + "#Applying Kirchhoff's voltage law to 1st loop of the circuit,\n", + "#V1-I*R1-E0=0, where E0 is the voltage across the points X-Y.\n", + "E0=V1-I*R1; #Thevenin's voltage source, V\n", + "\n", + "R0=R1*R2/(R1+R2); #Thevenin's resistance, \u03a9\n", + "\n", + "#Finding Norton's equivalent circuit\n", + "IN=E0/R0; #Norton's equivalent current source, A\n", + "RN=R0; #Norton's equivanlent resistance, \u03a9\n", + "\n", + "#Result\n", + "print(\"IN=%.1fA and RN=%.2f \u03a9\"%(IN,RN));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "IN=3.3A and RN=6.67 \u03a9\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter20_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter20_1.ipynb new file mode 100644 index 00000000..cad31534 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter20_1.ipynb @@ -0,0 +1,677 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:369e36634d005b832372dcae6796c76b979f32b499d8baadce951517f2201533" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 20 : SILICON CONTROLLED RECTIFIERS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.2 : Page number 559\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I=50.0; #Surge current, A\n", + "t=12.0; #Time for which surge current lasts, ms\n", + "circuit_fusing_rating_max=90; #Maximum circuit fusing rating, A\u00b2s\n", + "\n", + "#Calculation\n", + "circuit_fusing_rating=I**2*(t*10**-3); #Circuit fusing rating, A\u00b2s\n", + "\n", + "#Result\n", + "if(circuit_fusing_rating<circuit_fusing_rating_max):\n", + " print(\"The device will not be destroyed.\");\n", + "else:\n", + " print(\"The device will be destroyed.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The device will not be destroyed.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.3 : Page number 559\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I2_t_rating=50.0; #circuit fuse rating, A\u00b2s\n", + "Is=100.0; #Surge current, A\n", + "\n", + "#Calculation\n", + "t_max=(I2_t_rating/Is**2)*1000; #Maximum allowable duration, ms\n", + "\n", + "\n", + "#Result\n", + "print(\"The maximum allowable duration =%dms\"%t_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum allowable duration =5ms\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.4 : Page number 559\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "R=220.0; #Gate resistor, \u03a9\n", + "I_G=7.0; #Gate current, mA\n", + "V_GK=0.7; #Junction voltage, V\n", + "\n", + "#Calculation\n", + "V_in=V_GK+(I_G/1000)*R; #Input voltage, V (Kirchhoff's voltage law)\n", + "\n", + "#Result\n", + "print(\"The required input voltage=%.2fV.\"%V_in);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The required input voltage=2.24V.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.5 : Page number 564\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import asin\n", + "from math import cos\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "I_G=1.0; #Gate current, mA\n", + "V_m=200.0; #Peak value of input sinusoidal voltage, V\n", + "v=100.0; #Forward breakdown voltage of SCR, V\n", + "R_L=100.0; #Load resistance, \u03a9\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#v=Vm*sin(theta)\n", + "#Finding angle theta, for input voltage (v)= (V_f)forward_breakdown_voltage\n", + "theta=asin(v/V_m); #angle for input voltage = forward breakdown voltage, rad\n", + "theta=theta*180/pi; #angle for input voltage = forward breakdown voltage, degrees\n", + "\n", + "alpha=round(theta,0); #Firing angle, degrees\n", + "\n", + "#(ii)\n", + "phi=180-alpha; #Conduction angle, degrees\n", + "\n", + "#(iii)\n", + "V_avg=(V_m/(2*pi))*(1+cos(alpha*pi/180)); #Average voltage, V\n", + "I_avg=V_avg/R_L; #Average current, A\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The firing agle=%d\u00b0\"%alpha);\n", + "print(\"(ii) The conduction angle=%.0f\u00b0\"%phi);\n", + "print(\"(iii) The average current=%.4fA \"%I_avg);\n", + "\n", + "#Note: In the text book has approximated the average current to 0.5925A but in the code it gets approximated to 0.5940A.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The firing agle=30\u00b0\n", + "(ii) The conduction angle=150\u00b0\n", + "(iii) The average current=0.5940A \n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.6 : Page number 564\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import asin\n", + "from math import cos\n", + "from math import pi\n", + "from math import floor\n", + "\n", + "\n", + "#Variable declaration\n", + "I_G=1.0; #Gate current, mA\n", + "V_m=400.0; #Peak value of input sinusoidal voltage, V\n", + "v=150.0; #Forward breakdown voltage of SCR, V\n", + "R_L=200.0; #Load resistance, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#v=Vm*sin(theta)\n", + "#Finding angle theta, for input voltage (v)= (V_f)forward_breakdown_voltage\n", + "theta=asin(v/V_m); #angle for input voltage = forward breakdown voltage, rad\n", + "theta=theta*180/pi; #angle for input voltage = forward breakdown voltage, degrees\n", + "\n", + "alpha=theta; #Firing angle, degrees\n", + "\n", + "#(ii)\n", + "V_av=floor((V_m/(2*pi))*(1+cos(alpha*pi/180))*10)/10; #Average voltage, V\n", + "\n", + "#(iii)\n", + "I_av=V_av/R_L; #Average current, A\n", + "\n", + "#(iv)\n", + "P_out=V_av*I_av; #Output power, W\n", + "\n", + "#Result\n", + "print(\"(i) The firing agle=%d\u00b0\"%alpha);\n", + "print(\"(ii) The average output voltage=%.1f V\"%V_av);\n", + "print(\"(iii) The average current=%.3fA \"%I_av);\n", + "print(\"(iv) The output power=%.2f W\"%P_out);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The firing agle=22\u00b0\n", + "(ii) The average output voltage=122.6 V\n", + "(iii) The average current=0.613A \n", + "(iv) The output power=75.15 W\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.7 : Page number 564-565\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import asin\n", + "\n", + "#Variable declaration\n", + "v=180.0; #Forward breakdown voltage, V\n", + "V_m=240.0; #Peak value of input voltage, V\n", + "w=314.0; #Angular frequency of input ,rad/s\n", + "\n", + "\n", + "#Calculation\n", + "#v=Vm*sin(w*t)\n", + "#So, t=asin(v/Vm)/w\n", + "t=(asin(v/V_m)/w)*1000; #Time for which SCR remains off, ms\n", + "\n", + "#Result\n", + "print(\"The SCR remains off for %.1f ms.\"%t);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The SCR remains off for 2.7 ms.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.8 : Page number 565\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import cos\n", + "from math import floor\n", + "\n", + "#Variable declaration\n", + "I_dc=1.0; #d.c load current, A\n", + "alpha=30.0; #Firing angle, \u00b0\n", + "\n", + "\n", + "#Calculation\n", + "I_av=I_dc; #Average current(= d.c current), A\n", + "\n", + "#Since, Iav=(Vm/(2*pi*RL))*(1+cos(alpha)) and Im=Vm/RL\n", + "I_m=floor((2*pi*I_av/(1+cos(alpha*pi/180)))*100)/100; #Peak-load current, A\n", + "\n", + "\n", + "\n", + "#Result\n", + "print(\"Peak-load current=%.2f A.\"%I_m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Peak-load current=3.36 A.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.9: Page number 565\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "from math import sin\n", + "\n", + "#Variable declaration\n", + "alpha=60.0; #Firing angle, \u00b0\n", + "P=100.0; #Power rating of tungsten lamp, W\n", + "V=110.0; #Voltage rating of tungsten lamp, V\n", + "V_ac=110.0; #a.c supply voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "V_m=V_ac*sqrt(2); #Peak value of input voltage, V\n", + "\n", + "alpha=alpha*pi/180; #firing angle, rad\n", + "\n", + "#Since, E_rms\u00b2=(1/2*pi) \u222b V_m\u00b2sin\u00b2(theta) d(theta), limits: alpha to pi\n", + "# E_rms\u00b2=Vm\u00b2*((2*(pi-alpha) + sin(2*alpha))/(8*pi)),\n", + "# E_rms=Vm*sqrt((2*(pi-alpha) + sin(2*alpha))/(8*pi)),\n", + "E_rms=round(V_m*sqrt((2*(pi-alpha) + sin(2*alpha))/(8*pi))); #r.m.s voltage developed in the lamp, V\n", + "\n", + "\n", + "RL=V**2/P; #Load resistance, \u03a9\n", + "\n", + "I_rms=E_rms/RL; #r.m.s current developed in the lamp, A\n", + "\n", + "#Result\n", + "print(\"The r.m.s voltage developed in the lamp=%d V.\"%E_rms);\n", + "print(\"The r.m.s current developed in the lamp=%.2f A.\"%I_rms);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The r.m.s voltage developed in the lamp=70 V.\n", + "The r.m.s current developed in the lamp=0.58 A.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.10 : Page number 567\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import cos\n", + "from math import pi\n", + "\n", + "#Variable declaration\n", + "RL=100.0; #Load resistance, \u03a9\n", + "V_m=200.0; #Peak a.c voltage, V\n", + "alpha=60; #firing angle, \u00b0\n", + "\n", + "#Calculation\n", + "#(i)\n", + "V_av=(V_m/pi)*(1+cos(alpha*pi/180)); #D.C output voltage, V\n", + "\n", + "#(ii)\n", + "I_av=V_av/RL; #Load current, A\n", + "\n", + "#Result\n", + "print(\"(i) d.c output voltage=%.1f V.\"%V_av);\n", + "print(\"(ii) Load current=%.3f A\"%I_av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) d.c output voltage=95.5 V.\n", + "(ii) Load current=0.955 A\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.11: Page number 567\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import pi\n", + "from math import sin\n", + "\n", + "#Variable declaration\n", + "alpha=60.0; #Firing angle, \u00b0\n", + "P=100.0; #Power rating of tungsten lamp, W\n", + "V=110.0; #Voltage rating of tungsten lamp, V\n", + "V_ac=110.0; #a.c supply voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "V_m=round(V_ac*sqrt(2)); #Peak value of input voltage, V\n", + "\n", + "alpha=alpha*pi/180; #firing angle, rad\n", + "\n", + "#Since, E_rms\u00b2=(1/2*pi) \u222b V_m\u00b2sin\u00b2(theta) d(theta), limits: alpha to pi\n", + "# E_rms\u00b2=Vm\u00b2*((2*(pi-alpha) + sin(2*alpha))/(8*pi)),\n", + "# E_rms=Vm*sqrt((2*(pi-alpha) + sin(2*alpha))/(8*pi)),\n", + "E_rms=V_m*sqrt((2*(pi-alpha) + sin(2*alpha))/(4*pi)); #r.m.s voltage developed in the lamp, V\n", + "\n", + "RL=V**2/P; #Load resistance, \u03a9\n", + "\n", + "I_rms=E_rms/RL; #r.m.s current developed in the lamp, A\n", + "\n", + "#Result\n", + "print(\"The r.m.s voltage developed in the lamp=%.1f V.\"%E_rms);\n", + "print(\"The r.m.s current developed in the lamp=%.2f A.\"%I_rms);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The r.m.s voltage developed in the lamp=98.9 V.\n", + "The r.m.s current developed in the lamp=0.82 A.\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.12 : Page number 572\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15; #Suuply voltage, V\n", + "V_T=0.7; #Gate trigger voltage, V\n", + "I_T=7.0; #Gate trigger current, mA\n", + "I_H=6.0; #Holding current. mA\n", + "R_Vin=1; #Resistance at Vin, k\u03a9\n", + "R_VCC=100; #Resistance at Vcc, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#(i) when SCR is off, there is no current, therefore no voltage drop across the resistor\n", + "V_out=VCC; #Output voltage, when SCR is off, V\n", + "\n", + "#(ii)\n", + "V_in=V_T+I_T*R_Vin; #Input voltage required to trigger the SCR, V\n", + "\n", + "#(iii)\n", + "#Since, I_H=(Vcc-VT)/R_Vin;\n", + "VCC_SCR_open=(I_H/1000)*R_VCC+V_T; #Decreased value of supply voltage at which SCR opens, V\n", + "\n", + "#Result\n", + "print(\"(i) The output voltage when SCR is off=%dV.\"%V_out);\n", + "print(\"(ii) The input voltage required to trigger the SCR=%.1f V.\"%V_in);\n", + "print(\"(iii) The decreased supply voltage at which SCR opens=%.1f V.\"%VCC_SCR_open);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The output voltage when SCR is off=15V.\n", + "(ii) The input voltage required to trigger the SCR=7.7 V.\n", + "(iii) The decreased supply voltage at which SCR opens=1.3 V.\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.13 : Page number 572-573\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=5.6; #zener voltage, V\n", + "V_T=0.7; #Trigger voltage of SCR, V\n", + "\n", + "#Calculation\n", + "VCC=Vz+V_T; #Required supply voltage to turn on the crowbar, V\n", + "\n", + "#Result\n", + "print(\"The required supply voltage to turn on the crowbar=%.1fV.\"%VCC);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The required supply voltage to turn on the crowbar=6.3V.\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.14 : Page number 573\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=12; #Zener breakdown voltage, V\n", + "V_T=1.5; #Trigger voltage, V\n", + "tolerance_z=10.0; #Tolerance of zener diode, %\n", + "\n", + "\n", + "#Calculation\n", + "Vz_max=Vz*(1+tolerance_z/100); #Maximum value of zener breakdown, V\n", + "Vz_min=Vz*(1-tolerance_z/100); #Minimum value of zener breakdown, V\n", + "V_crowbar=Vz_max+V_T; #Maximum value of supply voltage for crowbarring, V\n", + "\n", + "#Result\n", + "print(\"The maximum value of supply voltage for crowbarring=%.1fV\"%V_crowbar);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum value of supply voltage for crowbarring=14.7V\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 20.15 : Page number 573\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=25.0; #Supply voltage, V\n", + "\n", + "#Calculation\n", + "#When brights light is on, LASCR conducts and thus gets short circuited to ground, hence,\n", + "V_out=0; #Output voltage, V\n", + "\n", + "print(\"Output voltage when bright light is on=%dV\"%V_out);\n", + "\n", + "\n", + "#When brights light is off, LASCR stops conducting and thus no current through resistor, hence,\n", + "V_out=VCC; #Output voltage, V\n", + "print(\"Output voltage when bright light is off=%dV\"%V_out);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage when bright light is on=0V\n", + "Output voltage when bright light is off=25V\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter21_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter21_1.ipynb new file mode 100644 index 00000000..acca0cfa --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter21_1.ipynb @@ -0,0 +1,467 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:412bf04e25192c77f9fa9664d995cc0ae6446a81f631fb5e0e755ebfa36436bf" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 21 : POWER ELECTRONICS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.3: Page number 585\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GT=2; #Gate triggering voltage, V\n", + "V_F=0.7; #Forward voltage for diode D1\n", + "\n", + "#Calculation\n", + "#(i)Triggering only by a positive gate voltage,\n", + "#A diode is connected at the gatewith the n-side connected to thegate of the device,\n", + "V_A=V_F+V_GT; #Required voltage to trigger the device, V\n", + "\n", + "print(\"The required voltage to trigger the device only by positive voltage=%.1fV.\"%V_A);\n", + "\n", + "#(ii)\n", + "print(\"In order to trigger the triac only by negative voltage, the direction of diode D1 is reversed.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The required voltage to trigger the device only by positive voltage=2.7V.\n", + "In order to trigger the triac only by negative voltage, the direction of diode D1 is reversed.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.4 : Page number 585-586\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=50.0; #Resitor, \u03a9\n", + "V=50.0; #Supply voltage, V\n", + "V_drop=1.0; #Drop across the triac in conduction, V\n", + "\n", + "#Calculation\n", + "#(i) Ideal triac\n", + "#Since the triac is ideal, voltage drop across it is zero,\n", + "I=V/R; #Current through the 50 \u03a9 resistor, A\n", + "\n", + "print(\"(i) The cuurent through the 50 \u03a9 resistor when the triac is ideal=%dA.\"%I);\n", + "\n", + "#(ii) Triac has a drop of 1V\n", + "I=(V-V_drop)/R; #Current through the 50 \u03a9 resistor, A\n", + "\n", + "print(\"(ii) The current through the 50 \u03a9 resistor when the triac has a drop of 1V=%.2fA.\"%I);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The cuurent through the 50 \u03a9 resistor when the triac is ideal=1A.\n", + "(ii) The current through the 50 \u03a9 resistor when the triac has a drop of 1V=0.98A.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.5 : Page number 588-589\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_GT=2; #Gate triggering voltage, V\n", + "V_BO=20; #Breakover voltage,V\n", + "\n", + "#Calculation\n", + "print(\"The triggering level is raised by using a diac.\");\n", + "V_A=V_BO+V_GT; #Gate trigger signal, V\n", + "\n", + "#Result\n", + "print(\"In order to turn on the triac, the gate trigger signal=%dV.\"%V_A);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The triggering level is raised by using a diac.\n", + "In order to turn on the triac, the gate trigger signal=22V.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.6 : Page number 589\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_BO=30; #Breakover voltage of diac, V\n", + "V_GT=1; #Trigger voltage of the triac, V\n", + "I_T=10; #Trigger current, mA\n", + "\n", + "\n", + "#Calculation\n", + "V_A=V_BO+V_GT; #Voltage required for triggering the triac, V\n", + "\n", + "#Result\n", + "print(\"The minimum capacitor voltage that will trigger the triac=%d V.\"%V_A);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The minimum capacitor voltage that will trigger the triac=31 V.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.7 : Page number 593\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "eta=0.6; #Intrinsic stand-off ratio for UJT\n", + "R_BB=10; #Inter-base resistance, k\u03a9\n", + "\n", + "#Calculation\n", + "#Since, RBB=RB1+RB2 and eta=RB1/(RB1+RB2),\n", + "#eta=RB1/RBB.\n", + "R_B1=eta*R_BB; #Resistance of the bar between B1 and emitter junction, k\u03a9\n", + "R_B2=R_BB-R_B1; #Resistance of the bar between B2 and emitter junction, k\u03a9 \n", + "\n", + "#Result\n", + "print(\"Resistance of the bar between B1 and emitter junction=%d k\u03a9.\"%R_B1);\n", + "print(\"Resistance of the bar between B2 and emitter junction=%d k\u03a9.\"%R_B2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Resistance of the bar between B1 and emitter junction=6 k\u03a9.\n", + "Resistance of the bar between B2 and emitter junction=4 k\u03a9.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.8 : Page number 593\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_BB=10; #Interbase voltage, V\n", + "eta=0.65; #Intrinsic stand-off ratio for UJT\n", + "V_D=0.7; #Voltage drop in the pn junction, V\n", + "\n", + "#Calculation\n", + "V_stand_off=eta*V_BB; #Stand off voltage, V\n", + "V_P=V_stand_off+V_D; #Peak-point voltage, V\n", + "\n", + "#Result\n", + "print(\"Stand off voltage=%.1f V.\"%V_stand_off);\n", + "print(\"Peak-point voltage=%.1f V.\"%V_P);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Stand off voltage=6.5 V.\n", + "Peak-point voltage=7.2 V.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.9 : Page number 593\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_BB=25; #Interbase voltage, V\n", + "eta_max=0.86; #Maximum intrinsic stand-off ratio for UJT\n", + "eta_min=0.74; #Minimum intrinsic stand-off ratio for UJT\n", + "V_D=0.7; #Voltage drop in the pn junction, V\n", + "\n", + "#Calculation\n", + "V_P_max=eta_max*V_BB+V_D; #Maximum peak-point, V\n", + "V_P_min=eta_min*V_BB+V_D; #Minimum peak-point, V\n", + "\n", + "#Result\n", + "print(\"Maximum peak-point voltage=%.1fV\"%V_P_max);\n", + "print(\"Minimum peak-point voltage=%.1fV\"%V_P_min);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Maximum peak-point voltage=22.2V\n", + "Minimum peak-point voltage=19.2V\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.10 : Page number 593-594\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "eta=0.65; #Intrinsic stand-off ratio for UJT\n", + "R_BB=7.0; #Inter-base resistance, k\u03a9\n", + "R1=100.0; #Resistor R1, \u03a9\n", + "R2=400.0; #Resistor R2, \u03a9\n", + "V_S=12.0; #Source voltage, V\n", + "V_D=0.7; #Voltage drop in the pn junction, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#Since, eta=RB1/RBB,\n", + "R_B1=eta*R_BB; #Resistance of the bar between B1 and emitter junction, k\u03a9\n", + "R_B2=R_BB-R_B1; #Resistance of the bar between B2 and emitter junction, k\u03a9 \n", + "\n", + "print(\"(i) Resistance of the bar between B1 and emitter junction=%.2f k\u03a9.\"%R_B1);\n", + "print(\" Resistance of the bar between B2 and emitter junction=%.2f k\u03a9.\"%R_B2);\n", + "\n", + "#(ii)\n", + "V_B2_B1=V_S*R_BB/(R_BB + (R1/1000) + (R2/1000)); #Voltage across B2-B1, V (voltage divider rule)\n", + "V_P=eta*V_B2_B1+V_D; #Peak-point voltage, V\n", + "\n", + "print(\"(ii) The voltage across the base B2-B1=%.1fV.\"%V_B2_B1);\n", + "print(\" Peak-point voltage=%.2fV\"%V_P);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Resistance of the bar between B1 and emitter junction=4.55 k\u03a9.\n", + " Resistance of the bar between B2 and emitter junction=2.45 k\u03a9.\n", + "(ii) The voltage across the base B2-B1=11.2V.\n", + " Peak-point voltage=7.98V\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.11 : Page number 596\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log\n", + "\n", + "#Variable declaration\n", + "RE_initial=5; #Initial value of emitter resistor, k\u03a9\n", + "RE_adjusted=10; #Adjusted value of emitter resistor, k\u03a9\n", + "C=0.2; #Capacitance, \u03bcF\n", + "eta=0.54; #intrinsic stand-off ratio\n", + "\n", + "#Calculation\n", + "#(i)\n", + "t=round((RE_initial*1000*C*10**-6*log(1/(1-eta)))*1000,2); #Time period, ms\n", + "f=(1/t)*1000; #frequency, Hz\n", + "\n", + "print(\"Frequency for 5k\u03a9 setting=%dHz.\"%f);\n", + "\n", + "#(i)\n", + "t=round((RE_adjusted*1000*C*10**-6*log(1/(1-eta)))*1000,2); #Time period, ms\n", + "f=(1/t)*1000; #frequency, Hz\n", + "\n", + "print(\"Frequency for 10k\u03a9 setting=%dHz.\"%f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Frequency for 5k\u03a9 setting=1282Hz.\n", + "Frequency for 10k\u03a9 setting=645Hz.\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 21.12 : Page number 596-597\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log\n", + "\n", + "#Variable declaration\n", + "V_S=12; #Supply voltage, V\n", + "R_BB=5; #Interbase resistance, k\u03a9\n", + "R_1=50; #Resistor R1, k\u03a9\n", + "R_2=0.1; #Resistor R2, k\u03a9\n", + "C=0.1; #Capacitance, \u03bcF\n", + "eta=0.6; #intrinsic stand-off ratio\n", + "V_D=0.7; #Voltage drop across pn junction, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "#Since, \u03b7=R_B1/R_BB,\n", + "R_B1=eta*R_BB; #Resitance between base B1 and emitter junction, k\u03a9\n", + "\n", + "#Since, R_BB=R_B1+R_B2\n", + "R_B2=R_BB-R_B1; #Resitance between base B2 and emitter junction, k\u03a9\n", + "\n", + "#(ii)\n", + "V_RB1_R2=V_S*(R_B1+R_2)/(R_BB+R_2); #Voltage drop across R_B1 and R_2 resistors, V\n", + "V_P=V_D+V_RB1_R2; #Peak-point voltage, V\n", + "\n", + "#(iii)\n", + "t=round((R_1*1000*C*10**-6*log(1/(1-eta)))*1000,2); #Time period, ms\n", + "f=(1/t)*1000; #frequency, Hz\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) R_B1=%dk\u03a9 and R_B2=%dk\u03a9\"%(R_B1,R_B2));\n", + "print(\"(ii) The peak-point voltage to turn on the UJT=%.0fV.\"%V_P);\n", + "print(\"(iii) Frequency of oscillations=%dHz.\"%f);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) R_B1=3k\u03a9 and R_B2=2k\u03a9\n", + "(ii) The peak-point voltage to turn on the UJT=8V.\n", + "(iii) Frequency of oscillations=218Hz.\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter22_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter22_1.ipynb new file mode 100644 index 00000000..5f13ea0e --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter22_1.ipynb @@ -0,0 +1,668 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:a688629536ad6915939234eacc1ed3eaaf36e0aaa88de5df5b6a309da4d2c64d" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 22: ELECTRONIC INSTRUMENTS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.1 : Page number 606\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_g=1; #Full scale deflection current, mA\n", + "\n", + "#Calculation\n", + "MS=1/(I_g/1000.0); #Multimeter sensitivity, \u03a9 per volt\n", + "\n", + "#Result\n", + "print(\"The multimeter sensitivity=%d \u03a9 per volt.\"%MS);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The multimeter sensitivity=1000 \u03a9 per volt.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.2 : Page number 606-607\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "meter_sensitivity=1000.0; #Meter sensitivity, \u03a9 per volt\n", + "V_full_scale=50.0; #Full scale volts\n", + "R=50000.0; #Resistance to be measured, \u03a9\n", + "\n", + "#Calculation\n", + "meter_resistance=V_full_scale*meter_sensitivity; #Meter resistance, \u03a9\n", + "R_p=R*meter_resistance/(R+meter_resistance); #Parallel resistance, \u03a9\n", + "\n", + "#Result\n", + "print(\"When the meter is used to measure the voltage across the resistance %d\u03a9, total resistance =%d\u03a9.\"%(R,R_p));\n", + "print(\"\u2234 Meter will give highly incorrect reading.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "When the meter is used to measure the voltage across the resistance 50000\u03a9, total resistance =25000\u03a9.\n", + "\u2234 Meter will give highly incorrect reading.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.3 : Page number 607\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "meter_sensitivity=4.0; #Meter sensitivity, k\u03a9/V\n", + "R_1=10.0; #Resistance across which voltage is to be measured, k\u03a9\n", + "R_2=10.0; #Resistance, k\u03a9\n", + "range_max=10.0; #Maximum range of the meter, V\n", + "range_min=0; #Minimum range of the meter, V\n", + "V=20.0; #Battery voltage, V\n", + "\n", + "#Calculation\n", + "R_meter=meter_sensitivity*range_max; #Resistance of the meter, k\u03a9\n", + "R_T=(R_meter*R_1)/(R_1+R_meter) + R_2; #Total circuit resistance, k\u03a9\n", + "I_circuit=round(V/R_T,2); #Circuit current, mA\n", + "V_multimeter=I_circuit*((R_meter*R_1)/(R_1+R_meter)); #Voltage read by multimeter, V\n", + "\n", + "\n", + "#Result\n", + "print(\"Voltage read by multimeter=%.2fV.\"%V_multimeter);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage read by multimeter=8.88V.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.4 : Page number 607-608\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "meter_sensitivity=20.0; #Meter sensitivity, k\u03a9/V\n", + "R_1=10.0; #Resistance across which voltage is to be measured, k\u03a9\n", + "R_2=10.0; #Resistance, k\u03a9\n", + "range_max=10.0; #Maximum range of the meter, V\n", + "range_min=0; #Minimum range of the meter, V\n", + "V=20.0; #Battery voltage, V\n", + "\n", + "#Calculation\n", + "R_meter=meter_sensitivity*range_max; #Resistance of the meter, k\u03a9\n", + "R_T=round((R_meter*R_1)/(R_1+R_meter) + R_2,1); #Total circuit resistance, k\u03a9\n", + "I_circuit=round(V/R_T,2); #Circuit current, mA\n", + "V_multimeter=I_circuit*((R_meter*R_1)/(R_1+R_meter)); #Voltage read by multimeter, V\n", + "\n", + "\n", + "#Result\n", + "print(\"Voltage read by multimeter=%.2fV.\"%V_multimeter);\n", + "\n", + "\n", + "#Note: The circuit current=1.0256mA, has been approximated in the text as 1.04mA. But, in the code 1.03 mA has been used. Therefore, the final answer is obtained as 9.81V and not 9.88V.\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage read by multimeter=9.81V.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.5 : Page number 608-609\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import floor\n", + "\n", + "#Variable declaration\n", + "R_A=20.0; #Resistance after point A, k\u03a9\n", + "R_B=20.0; #Resistance after point B, k\u03a9\n", + "R_C=30.0; #Resistance after point C, k\u03a9\n", + "R_D=30.0; #Resistance after point D, k\u03a9\n", + "R_meter=60.0; #Resistance of the meter, k\u03a9\n", + "V=100.0; #Battery voltage, V\n", + "\n", + "#Calculation\n", + "#(i) When meter is not connected:\n", + "R_T=R_A+R_B+R_C+R_D; #Total circuit resistance, k\u03a9\n", + "I_circuit=V/R_T; #Circuit current, mA\n", + "V_A=V; #Voltage at point A, V\n", + "V_B=V-(I_circuit*R_A); #Voltage at point B, V\n", + "V_C=V-(I_circuit*(R_A+R_B)); #Voltage at point C, V\n", + "V_D=V-(I_circuit*(R_T-R_D)); #Voltage at point D, V\n", + "\n", + "print(\"(i) When meter is not connected:\");\n", + "print(\" Voltage at point A=%dV.\"%V_A);\n", + "print(\" Voltage at point B=%dV.\"%V_B);\n", + "print(\" Voltage at point C=%dV.\"%V_C);\n", + "print(\" Voltage at point D=%dV.\"%V_D);\n", + "\n", + "\n", + "#(ii) When meter is connected:\n", + "#(a) Since, point A is directly connected to the source, voltage at point A is equal to source voltage.\n", + "V_A=V; #Voltage at point A, V\n", + "\n", + "#(b)\n", + "R_T_B=R_A + round((R_T-R_A)*R_meter/(R_meter + (R_T-R_A)),2); #Total circuit resistance, k\u03a9\n", + "I_circuit=round(V/R_T_B,2); #Circuit current, mA\n", + "V_B=I_circuit*(R_T-R_A)*R_meter/(R_meter + (R_T-R_A)); #Voltage at point B, V\n", + "\n", + "\n", + "#(c)\n", + "R_T_C=(R_A+R_B) + (R_T-R_A-R_B)*R_meter/(R_meter + (R_T-R_A-R_B)); #Total circuit resistance, k\u03a9\n", + "I_circuit=V/R_T_C; #Circuit current, mA\n", + "V_C=floor((I_circuit*(R_T-R_A-R_B)*R_meter/(R_meter + (R_T-R_A-R_B)))*10)/10; #Voltage at point C, V\n", + "\n", + "\n", + "\n", + "#(c)\n", + "R_T_D=(R_T-R_D) + R_D*R_meter/(R_meter + R_D); #Total circuit resistance, k\u03a9\n", + "I_circuit=round(V/R_T_D,2); #Circuit current, mA\n", + "V_D=I_circuit*(R_D*R_meter)/(R_meter + R_D); #Voltage at point D, V\n", + "\n", + "\n", + "print(\"(ii) When meter is connected:\");\n", + "print(\" Voltage at point A=%dV.\"%V_A);\n", + "print(\" Voltage at point B=%dV.\"%V_B);\n", + "print(\" Voltage at point C=%.1fV.\"%V_C);\n", + "print(\" Voltage at point D=%.1fV.\"%V_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) When meter is not connected:\n", + " Voltage at point A=100V.\n", + " Voltage at point B=80V.\n", + " Voltage at point C=60V.\n", + " Voltage at point D=30V.\n", + "(ii) When meter is connected:\n", + " Voltage at point A=100V.\n", + " Voltage at point B=63V.\n", + " Voltage at point C=42.8V.\n", + " Voltage at point D=22.2V.\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.6 : Page number 614\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Supply voltage, V\n", + "R_m=1.0; #Meter resistance, k\u03a9\n", + "I_m_fsd=2.0; #Full scale deflection of meter current, mA\n", + "beta=80.0; #Base current amplification factor\n", + "E=5.0; #Voltage to be measured, V\n", + "V_BE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "V_E=E-V_BE; #Emitter voltage, V\n", + "\n", + "#(i)\n", + "#I_m_fsd=V_E/(R_s+R_m), (OHM's LAW)\n", + "R_s=((V_E/I_m_fsd)-R_m)*1000; #Multiplier resistor, \u03a9\n", + "\n", + "#(ii)\n", + "IB=I_m_fsd/beta; \t\t\t\t#Base current, mA\n", + "R_i=E/IB; \t\t\t#Input resistance of voltmeter, k\u03a9\n", + "\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The multiplier resistor=%d\u03a9.\"%R_s);\n", + "print(\"(ii) The voltmeter input resistance=%dk\u03a9\"%R_i);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The multiplier resistor=1150\u03a9.\n", + "(ii) The voltmeter input resistance=200k\u03a9\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.7 : Page number 614\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20; #Supply voltage, V\n", + "Rs_Rm=9.3; #Sum of multipier resistance and meter resistance, k\u03a9\n", + "I_m=1; #Meter current, mA\n", + "beta=100; #Base current amplification factor\n", + "E=10; #Voltage to be measured, V\n", + "V_BE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "V_E=E-V_BE; #Emitter voltage, V\n", + "I_m=V_E/Rs_Rm; #Meter current, mA\n", + "\n", + "#(ii)\n", + "I_B=I_m/beta; #Base current, mA\n", + "R_i_T=(E/I_B)/1000; #Input resistance of voltmeter, with transistor, M\u03a9\n", + "R_i_WT=Rs_Rm; #Input resistance of voltmeter, without transistor, k\u03a9\n", + "\n", + "#Result\n", + "print(\"(i) The meter current=%dmA\"%I_m);\n", + "print(\"(ii) The input resistance of voltmeter with transistor=%dM\u03a9.\"%R_i_T);\n", + "print(\" The input resistance of voltmeter without transistor=%.1fk\u03a9.\"%R_i_WT);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The meter current=1mA\n", + "(ii) The input resistance of voltmeter with transistor=1M\u03a9.\n", + " The input resistance of voltmeter without transistor=9.3k\u03a9.\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.8 : Page number 614-615\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20; #Supply voltage, V\n", + "Rs_Rm=9.3; #Sum of multipier resistance and meter resistance, k\u03a9\n", + "I_m=1; #Meter current, mA\n", + "beta=100; #Base current amplification factor\n", + "E=5; #Voltage to be measured, V\n", + "V_BE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "I_m=(E-V_BE)/Rs_Rm; #Meter current, mA\n", + "\n", + "#Result\n", + "print(\"The meter current=%.2fmA\"%I_m);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The meter current=0.46mA\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.9 : Page number 616\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "from math import floor\n", + "\n", + "#Variable declaration\n", + "I_m_fsd=100.0; #Full scale deflection of meter current, \u03bcA\n", + "R_m=1.0; #Meter resistance, k\u03a9\n", + "V_rms=100.0; #r.m.s voltage to be measured, V\n", + "V_F=0.7; #Forward voltage drop of rectifier diode, V \n", + "\n", + "#Calculation\n", + "V_m=round(sqrt(2)*V_rms,1); #Peak value of applied voltage, V\n", + "V_rectifier_drop=2*V_F; #Total rectifier drop, V\n", + "I_peak=round(I_m_fsd/0.637,2); #Peak f.s.d current, \u03bcA\n", + "R_s=floor(((((V_m-V_rectifier_drop)/(I_peak*10**-6))-(R_m*1000))/1000)*10)/10; #Multiplier resistance, k\u03a9 (OHM's LAW)\n", + "\n", + "\n", + "#Result\n", + "print(\"The multiplier resistance=%.1fk\u03a9.\"%R_s);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The multiplier resistance=890.7k\u03a9.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.10 : Page number 616\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "I_av=75; #Full scale deflection of meter current, \u03bcA\n", + "R_s=708; #Multiplier resistor, k\u03a9\n", + "R_m=900; #Meter coil resistor, \u03a9\n", + "\n", + "#Calculation\n", + "I_peak=I_av*10**-6/0.637; #Peak f.s.d meter current, A\n", + "R_T=R_s*1000+R_m; #Total circuit resistance, \u03a9\n", + "\n", + "#I_peak=(Vm-V_drop)/R_T; (OHM's LAW)\n", + "#And, Vm=sqrt(2)*Vrms\n", + "V_rms=(I_peak*R_T+(2*0.7))/sqrt(2) ; #applied r.m.s voltage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"The applied r.m.s voltage=%dV\"%V_rms);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The applied r.m.s voltage=60V\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.11 : Page number 618\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "deflection_sensitivity=0.01; #Deflection sensitivity, mm/V\n", + "V=400; #Applied voltage, V\n", + "\n", + "#Calculation\n", + "spot_shift=V*deflection_sensitivity; #Spot shift produced, mm\n", + "\n", + "\n", + "#Result\n", + "print(\"The shift produced in the spot=%dmm.\"%spot_shift);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The shift produced in the spot=4mm.\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.12 : Page number 618-619\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "deflection_sensitivity=0.03; #Deflection sensitivity, mm/V\n", + "spot_shift=3; #Spot shift produced, mm\n", + "\n", + "\n", + "#Calculation\n", + "#Since, spot_shift=Applied_Voltage*deflection_sensitivity,\n", + "V=spot_shift/deflection_sensitivity; #Applied voltage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"Applied voltage=%dV.\"%V);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Applied voltage=100V.\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.13 : Page number 622\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "deflection=2; #Deflection produced by applied voltage, cm\n", + "V=200; #Applied voltage, V\n", + "deflection_by_another_voltage=3; #Deflection by another voltage, cm\n", + "\n", + "#Calculation\n", + "deflection_sensitivity=V/deflection; #deflection sensitivity, V/cm\n", + "V_unknown=deflection_sensitivity*deflection_by_another_voltage; #Unknown voltage, V\n", + "\n", + "#Result\n", + "print(\"The unknown voltage=%dV.\"%V_unknown);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The unknown voltage=300V.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 22.14 : Page number 622\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "f_H=1000; #Frequency applied to horizontal plates, Hz\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Loops_H=1; #Number of loops cut by horizontal line\n", + "Loops_V=1; #Number of loops cut by vertical line\n", + "f_V=f_H*(Loops_H/Loops_V); #Unknown frequency, Hz\n", + "\n", + "print(\"(i) Unknown frequency=%dHz.\"%f_V);\n", + "\n", + "#(ii)\n", + "Loops_H=2; #Number of loops cut by horizontal line\n", + "Loops_V=1; #Number of loops cut by vertical line\n", + "f_V=f_H*(Loops_H/Loops_V); #Unknown frequency, Hz\n", + "\n", + "print(\"(ii) Unknown frequency=%dHz.\"%f_V);\n", + "\n", + "#(iii)\n", + "Loops_H=6; #Number of loops cut by horizontal line\n", + "Loops_V=1; #Number of loops cut by vertical line\n", + "f_V=f_H*(Loops_H/Loops_V); #Unknown frequency, Hz\n", + "\n", + "print(\"(iii) Unknown frequency=%dHz.\"%f_V);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Unknown frequency=1000Hz.\n", + "(ii) Unknown frequency=2000Hz.\n", + "(iii) Unknown frequency=6000Hz.\n" + ] + } + ], + "prompt_number": 21 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter23_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter23_1.ipynb new file mode 100644 index 00000000..19741354 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter23_1.ipynb @@ -0,0 +1,133 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:87bd5c8d9448f5bb2e75909f89934a6fb2b64e65e6ea37b085ce080a58026071" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 23 : INTEGRATED CIRCUITS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 23.1: Page number 637" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=240; #Adjusted resistance of R2 resistor of LM317 voltage regulator, in kilo ohm\n", + "R2=2.4; #Fixed value of R1 resistor of LM317 voltage regulator, in ohm\n", + "\n", + "#Calculations\n", + "#Output voltage of LM317 voltage regulator IC = 1.25(R2/R1 +1)\n", + "Vout=1.25*((R2*1000)/R1 + 1); #Regulated d.c output voltage for the circuit in V\n", + "\n", + "#Results\n", + "print(\"The regulated d.c output voltage = %.2fV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The regulated d.c output voltage = 13.75V\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 23.2 : Page number 638" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=1.2; #Value of resistance of monostable multivibrator in kilo ohm\n", + "C=0.1; #Value of capacitance of monostable multivibrator in microfarad\n", + "\n", + "#Calculations\n", + "T=1.1*(R*1000)*C; #Time for which the circuit is ON, in microseconds\n", + "\n", + "#Results\n", + "print(\"Time for which the circuit is ON = %d microseconds.\"%T); \n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Time for which the circuit is ON = 132 microseconds.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 23.3 : Page number 639\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=3.0; #Resistance of R1 resistor of 555 timer circuit in kilo ohm\n", + "R2=2.7; #Resistance of R2 resistor of 555 timer circuit in kilo ohm\n", + "C=0.033; #Capacitance of the capacitor of 555 timer circuit in microfarad\n", + "\n", + "#Calculations\n", + "f=1.44/(((R1*1000) + 2*(R2*1000))*(C*pow(10,-6))); #Frequency of the circuit in Hz\n", + "f=f/1000; #Frequency of the circuit in kHz\n", + "\n", + "#Results\n", + "print(\"The frequency of the circuit = %.2fkHz\"%f);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The frequency of the circuit = 5.19kHz\n" + ] + } + ], + "prompt_number": 3 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter24_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter24_1.ipynb new file mode 100644 index 00000000..e63c17a6 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter24_1.ipynb @@ -0,0 +1,604 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:947f358cf49d029c94d008f72a340051744678cf2e36ecc199100b78d31fcba5" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 24 : HYBRID PARAMETERS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.1 : Page number 644-645\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=10.0; #1st resistor, \u03a9\n", + "R2=5.0; #2nd resistor, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "print(\"To find h11 and h21, output terminals are shorted.\");\n", + "h11=R1; #Input impedance with output shorted, \u03a9\n", + "\n", + "print(\"h11=%d\u03a9.\"%h11);\n", + "\n", + "print(\"Output current flowing into the box= input current flowing out of the box.\");\n", + "print(\"i2=-i1\"); #Output current flowing into the box= input current flowing out of the box.\n", + "print(\"h21=i2/i1 = -i1/i1= -1.\"); #Current gain with output shorted.\n", + "\n", + "\n", + "print(\"For finding h22 and h12, voltage source is connected at the output\");\n", + "#As, there will be no current through 10k\u03a9 resistor due to open circuited input,\n", + "print(\"v1=v2\"); #Output voltage is equal to input voltage(equal to voltage drop across 5k\u03a9 resistor)\n", + "print(\"h12=v1/v2 = v2/v2 = 1\"); #Voltage feedback ratio with input terminals open\n", + "\n", + "h22=1/R2; #Output admittance, mho\n", + "print(\"h22=%.1f mho\"%h22);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "To find h11 and h21, output terminals are shorted.\n", + "h11=10\u03a9.\n", + "Output current flowing into the box= input current flowing out of the box.\n", + "i2=-i1\n", + "h21=i2/i1 = -i1/i1= -1.\n", + "For finding h22 and h12, voltage source is connected at the output\n", + "v1=v2\n", + "h12=v1/v2 = v2/v2 = 1\n", + "h22=0.2 mho\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.2 : Page number 645-646\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=4.0; #1st resistor(at the input side), \u03a9\n", + "R2=4.0; #2nd resistor(at the middle), \u03a9\n", + "R3=4.0; #3rd resistor(at the output side), \u03a9\n", + "\n", + "#Calculation\n", + "print(\"To find h11 and h21, output terminals are shorted.\");\n", + "h11=R1 + (R2*R3/(R2+R3)); #Input impedance with output shorted, \u03a9\n", + "print(\"h11=%d\u03a9.\"%h11);\n", + "\n", + "#As the input current gets divided in half due to R2=R3.\n", + "print(\"Output current flowing into the box=negative of half of input current flowing out of the box.\");\n", + "print(\"i2=-i1/2 = -0.5i1\"); \n", + "print(\"h21=i2/i1 = -0.5i1/i1= -0.5.\"); #Current gain with output shorted.\n", + "\n", + "print(\"For finding h22 and h12, voltage source is connected at the output\");\n", + "#As, there will be no current through the 1st 4k\u03a9 resistor due to open circuited input,\n", + "#Voltage gets equally divided across R2 and R3 resistor\n", + "print(\"v1=v2/2 = 0.5v2\"); #Input voltage is equal to half of input voltage\n", + "print(\"h12=v1/v2 = 0.5v2/v2 = 0.5\"); #Voltage feedback ratio with input terminals open\n", + "\n", + "h22=1/(R2+R3); #Output admittance, mho\n", + "print(\"h22=%.3f mho\"%h22);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "To find h11 and h21, output terminals are shorted.\n", + "h11=6\u03a9.\n", + "Output current flowing into the box=negative of half of input current flowing out of the box.\n", + "i2=-i1/2 = -0.5i1\n", + "h21=i2/i1 = -0.5i1/i1= -0.5.\n", + "For finding h22 and h12, voltage source is connected at the output\n", + "v1=v2/2 = 0.5v2\n", + "h12=v1/v2 = 0.5v2/v2 = 0.5\n", + "h22=0.125 mho\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.3 ; Page number 649-650\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R1=10.0; #Resistor at the input side, \u03a9\n", + "R2=5.0; #Resistor at the middle, \u03a9\n", + "rL=5.0; #Load resistor, \u03a9\n", + "\n", + "#h-parameter values from 24.1\n", + "h11=10.0; #Input impedance with output shorted, \u03a9\n", + "h21=-1.0; #Current gain with output shorted\n", + "h12=1.0; #Voltage feedback ratio with input terminal open\n", + "h22=0.2; #Output admittance, mho\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Zin=h11-(h12*h21/(h22+(1/rL))); #Input impedance, \u03a9\n", + "\n", + "#(ii)\n", + "Av=-h21/(Zin*(h22+(1/rL))); #voltage gain,\n", + "\n", + "#Result\n", + "print(\"(i) The input impedance=%.1f\u03a9.\"%Zin );\n", + "print(\"(ii) The voltage gain=1/%d.\"%(1/Av));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The input impedance=12.5\u03a9.\n", + "(ii) The voltage gain=1/5.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.4 : Page number 652-653\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCE=10.0; #Collector-emitter voltage, V\n", + "IC=1.0; #Collector current, mA\n", + "rL=600.0; #a.c load seen by the transistor,\u03a9\n", + "\n", + "#h-parameters\n", + "hie=2000.0; #Input impedance with output shorted, \u03a9\n", + "hoe=10**-4; #Output impedance, mho\n", + "hre=10**-3; #Voltage feedback ratio with input terminal open\n", + "hfe=50.0; #Current gain with output shorted\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Zin=hie - (hre*hfe/(hoe+(1/rL))); #Input impedance, \u03a9\n", + "print(\"Input impedance=%.0f \u03a9. \\n As second term in the expression of Zin is small compared to first, Zin~hie=%d\u03a9.\"%(Zin,hie));\n", + "\n", + "#(ii)\n", + "Ai=hfe/(1+hoe*rL); #Current gain\n", + "print(\"Current gain=%d\"%Ai);\n", + "print(\"if hoe*rL<<1, then Ai~hfe=%d.\"%hfe);\n", + "\n", + "#(iii)\n", + "Av=-hfe/(Zin*(hoe+(1/rL))); #Voltage gain\n", + "print(\"Voltage gain=%.1f\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Input impedance=1972 \u03a9. \n", + " As second term in the expression of Zin is small compared to first, Zin~hie=2000\u03a9.\n", + "Current gain=47\n", + "if hoe*rL<<1, then Ai~hfe=50.\n", + "Voltage gain=-14.4\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.5 : Page number 653\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import ceil\n", + "\n", + "#Variable declaration\n", + "VCE=5.0; #Collector-emitter voltage, V\n", + "IC=1.0; #Collector current, mA\n", + "rL=2.0; #a.c load seen by the transistor,\u03a9\n", + "\n", + "\n", + "#h-parameters\n", + "hie=1700.0; #Input impedance with output shorted, \u03a9\n", + "hoe=6*10**-6; #Output impedance, mho\n", + "hre=1.3*10**-4; #Voltage feedback ratio with input terminal open\n", + "hfe=38.0; #Current gain with output shorted\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Zin=hie - (hre*hfe/(hoe+(1/(rL*1000)))); #Input impedance, \u03a9\n", + "print(\"Input impedance=%.0f \u03a9.\"%Zin);\n", + "\n", + "#(ii)\n", + "Ai=ceil((hfe/round((1+hoe*rL*1000),3))*10)/10; #Current gain\n", + "print(\"Current gain=%.1f\"%Ai);\n", + "\n", + "#(iii)\n", + "Av=-hfe/(Zin*(hoe+(1/(rL*1000)))); #Voltage gain\n", + "print(\"Voltage gain=%.1f\"%abs(Av));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Input impedance=1690 \u03a9.\n", + "Current gain=37.6\n", + "Voltage gain=44.4\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.6 : Page number 653-654\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Function for calculating parallel resistance\n", + "def pr(r1,r2):\n", + " return r1*r2/(r1+r2);\n", + "\n", + "\n", + "#Variable declaration\n", + "RC=10.0; #Collector resistance, k\u03a9\n", + "RL=30.0; #Load resistance, k\u03a9\n", + "R1=80.0; #Resistor R1, k\u03a9\n", + "R2=40.0; #Resistor R2, k\u03a9\n", + "\n", + "#h-parameters\n", + "hie=1500.0; #Input impedance with output shorted, \u03a9\n", + "hoe=5*10**-5; #Output impedance, mho\n", + "hre=4*10**-4; #Voltage feedback ratio with input terminal open\n", + "hfe=50.0; #Current gain with output shorted\n", + "\n", + "\n", + "#Calculation\n", + "rL=((RC*RL)/(RC+RL))*1000; #a.c load as seen by resistance, \u03a9\n", + "\n", + "#(i)\n", + "Zin=round(hie - (hre*hfe/(hoe+(1/rL))),-1); #Input impedance, \u03a9\n", + "print(\"Input impedance=%.0f \u03a9.\"%Zin);\n", + "\n", + "#Input impedance of stage=input impedance || bias resistors\n", + "Zin_stage=round(pr(pr(R1,R2)*1000,Zin),-1); #\u03a9\n", + "print(\"Input impedance of the stage=%.0f \u03a9.\"%Zin_stage);\n", + "\n", + "#(ii)\n", + "Av=-hfe/(Zin*(hoe+(1/rL))); #Voltage gain\n", + "print(\"Voltage gain=%d\"%Av);\n", + "print(\"The negative sign represents phase reversal.\");\n", + "\n", + "\n", + "#(iii)\n", + "Zout=(1/(hoe-(hfe*hre/hie)))/1000; #Output impedance of transistor, k\u03a9\n", + "Zout_stage=pr(Zout,pr(RL,RC)); #Output impedance of the stage, k\u03a9\n", + "print(\"Output impedance=%.2f k\u03a9.\"%Zout);\n", + "print(\"Output impedance of the stage=%.2f k\u03a9.\"%Zout_stage);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Input impedance=1390 \u03a9.\n", + "Input impedance of the stage=1320 \u03a9.\n", + "Voltage gain=-196\n", + "The negative sign represents phase reversal.\n", + "Output impedance=27.27 k\u03a9.\n", + "Output impedance of the stage=5.88 k\u03a9.\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.7 : Page number 654\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Function for calculating parallel resistance\n", + "def pr(r1,r2):\n", + " return r1*r2/(r1+r2);\n", + "\n", + "#Variable declaration\n", + "RC=4.7; #Collector resistance, k\u03a9\n", + "RL=10.0; #Load resistance, k\u03a9\n", + "R1=33.0; #Resistor R1, k\u03a9\n", + "R2=10.0; #Resistor R2, k\u03a9\n", + "\n", + "#h-parameters\n", + "hie=1; #Input impedance with output shorted, k\u03a9\n", + "hoe=25; #Output impedance, \u03bcS\n", + "hre=2.5*10**-4; #Voltage feedback ratio with input terminal open\n", + "hfe=50; #Current gain with output shorted\n", + "\n", + "\n", + "#Calculation\n", + "rL=(RC*RL)/(RC+RL); #a.c load as seen by resistance, k\u03a9\n", + "\n", + "Ai=hfe/(1+hoe*10**-6*rL*1000); #Current gain\n", + "print(\"Current gain=%.1f\"%Ai);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current gain=46.3\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.8 : Page number 654-655\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R_S=100.0; #Series resistance, \u03a9 \n", + "\n", + "#h-parameters\n", + "hie=1.0; #Input impedance with output shorted, k\u03a9\n", + "hoe=25.0; #Output impedance, \u03bcS\n", + "hre=2.5*10**-4; #Voltage feedback ratio with input terminal open\n", + "hfe=50.0; #Current gain with output shorted\n", + "\n", + "\n", + "#Calculation\n", + "Zout=(1/(hoe*10**-6-(hfe*hre/(hie*1000+R_S))))/1000; #Output impedance of transistor, k\u03a9\n", + "print(\"Output impedance=%.1f k\u03a9.\"%Zout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output impedance=73.3 k\u03a9.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.9 : Page number 656\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import floor\n", + "\n", + "#Function for calculating parallel resistance\n", + "def pr(r1,r2):\n", + " return r1*r2/(r1+r2);\n", + "\n", + "#Variable declaration\n", + "RC=12.0; #Collector resistance, k\u03a9\n", + "RL=15.0; #Load resistance, k\u03a9\n", + "R1=50.0; #Resistor R1, k\u03a9\n", + "R2=5.0; #Resistor R2, k\u03a9\n", + "hie=1.94; #Input impedance with output shorted, k\u03a9\n", + "hfe=71.0; #Current gain with output shorted\n", + "\n", + "\n", + "\n", + "#Calculation\n", + "rL=(RC*RL)/(RC+RL); #a.c load as seen by resistance, \u03a9\n", + "\n", + "#(i)\n", + "Zin_base=hie; #Transistor input impedance, k\u03a9\n", + "Zin_circuit=floor(pr(Zin_base,pr(R1,R2))*100)/100; #Circuit input impedance, k\u03a9\n", + "print(\"Circuit input impedance=%.2fk\u03a9\"%Zin_circuit);\n", + "\n", + "\n", + "#(ii)\n", + "Av=hfe*rL/hie; #Voltage gain\n", + "print(\"Voltage gain=%.0f\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Circuit input impedance=1.35k\u03a9\n", + "Voltage gain=244\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.10 : Page number 656\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "hie_min=600; #Minimum input impedance with output shorted, \u03a9\n", + "hfe_min=110; #Minimum current gain with output shorted\n", + "hie_max=800; #Maximum input impedance with output shorted, \u03a9\n", + "hfe_max=140; #Maximum current gain with output shorted\n", + "rL=460; #a.c collector load, \u03a9\n", + "\n", + "#Calculation\n", + "hie=round(sqrt(hie_min*hie_max)); #Input impedance with output shorted, \u03a9\n", + "hfe=round(sqrt(hfe_min*hfe_max)); #Current gain with output shorted\n", + "Av=hfe*rL/hie; #Voltage gain\n", + "\n", + "#Result\n", + "print(\"Voltage gain=%.1f\"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain=82.3\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 24.11 : Page number 658-659\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#(a)Variable declaration\n", + "Ib=10; #Base current, \u03bcA\n", + "Ic=1; #Collector current, mA\n", + "Vbe=10; #Base-emitter voltage, mV\n", + "\n", + "#Calculation\n", + "hie=Vbe*10**-3/(Ib*10**-6); #Input impedance with output shorted, \u03a9\n", + "hfe=Ic*10**-3/(Ib*10**-6); #Current gain with output shorted\n", + "\n", + "#(b) Variable declaration\n", + "Vbe=0.65; #Base-emitter voltage, mV\n", + "Ic=60; #Collector current, \u03bcA\n", + "Vce=1; #Collector-emitter voltage, V\n", + "\n", + "#Calculation\n", + "hre=Vbe*10**-3/Vce; #Voltage feedback ratio with input terminal open\n", + "hoe=Ic/Vce; #Output impedance, \u03bcmho\n", + "\n", + "\n", + "#Result\n", + "print(\"hie=%d\u03a9\"%hie);\n", + "print(\"hfe=%d\"%hfe);\n", + "print(\"hre=%.2fe\u201303\"%(hre*1000));\n", + "print(\"hoe=%d\u03bcmho\"%hoe);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "hie=1000\u03a9\n", + "hfe=100\n", + "hre=0.65e\u201303\n", + "hoe=60\u03bcmho\n" + ] + } + ], + "prompt_number": 20 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter25_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter25_1.ipynb new file mode 100644 index 00000000..6add7ba9 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter25_1.ipynb @@ -0,0 +1,2552 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:f21def3bd5ac5e7f3368a4e0e9a53b6961ecc94a2dca6b1917cdfda88271b542" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 25 : OPERATIONAL AMPLIFIERS" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.1: Page number 664\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A=100.0; #Open-circuit voltage gain of differential amplifier\n", + "V1=3.25; #Input voltage to terminal 1 in V\n", + "V2=3.15; #Input voltage to terminal 2 in V\n", + "\n", + "#Calculations\n", + "V0=A*(V1-V2); #Output voltage in V\n", + "\n", + "#Results\n", + "print(\"The output voltage of the differential amplifier = %dV\"%V0);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output voltage of the differential amplifier = 10V\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.2: Page number 672\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "A_DM=2000.0; #Differential mode voltage gain\n", + "A_CM=0.2; #Common mode voltage gain\n", + "\n", + "#Calculations\n", + "CMRR=A_DM/A_CM; #Common mode rejection ratio\n", + "CMRR_dB=20*log10(CMRR); #Common mode rejection ratio in dB\n", + "\n", + "\n", + "#Results\n", + "print(\"The common mode rejection ratio = %d.\"%CMRR);\n", + "print(\"The common mode rejection ratio in decibels= %ddB.\"%CMRR_dB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The common mode rejection ratio = 10000.\n", + "The common mode rejection ratio in decibels= 80dB.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.3: Page number 672\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "VD_in=10.0; #Differential mode input in mV\n", + "VD_out=1.0; #Output for differential mode input in V\n", + "VC_in=10.0; #Common mode input in mV\n", + "VC_out=5.0; #Output for common mode input in mV\\\n", + "\n", + "#Calculations\n", + "A_DM=(VD_out*1000)/VD_in; #Differntial mode voltage gain\n", + "A_CM=VC_out/VC_in; #Common mode voltage gain\n", + "CMRR=A_DM/A_CM; #Common mode rejection ratio\n", + "CMRR_dB=20*log10(CMRR); #Common mode rejection ratio in dB\n", + "\n", + "#Results\n", + "print(\"The common mode rejection ratio in decibels= %ddB.\"%CMRR_dB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The common mode rejection ratio in decibels= 46dB.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.4: Page number 672\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_DM=150.0; #Differential mode voltage gain\n", + "CMRR_dB=90.0; #Common mode rejection ratio\n", + "V1=100.0; #Input voltage for terminal 1 in mV\n", + "V2=50.0; #Input voltage for terminal 2 in mV\n", + "V_noise=1.0; #Voltage of noise signal in mV\n", + "\n", + "#Calculation\n", + "\n", + "#Case(i)\n", + "V_out=A_DM*(V1-V2)/1000.0; #Output voltage for differntial mode input, in V\n", + "\n", + "#Since CMRR_dB=20*log10(differential mode gain/common mode gain),\n", + "A_CM=A_DM/pow(10,(CMRR_dB/20)); #Common mode gain\n", + "V_OUT_noise=A_CM*(V_noise/1000); #Noise on output in V\n", + "\n", + "\n", + "#Results\n", + "print(\"Output voltage =%.1fV\"%V_out);\n", + "print(\"Noise on output = %.1fx10^-6V\"%(V_OUT_noise*pow(10,6)));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage =7.5V\n", + "Noise on output = 4.7x10^-6V\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.5 : Page number 672-673\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "A_DM=2500.0; #Differential mode voltage gain\n", + "CMRR=30000.0; #Common mode rejection ratio\n", + "Input_signal=500.0; #Single ended input r.m.s signal in microvolts\n", + "Interference=1.0; #Interference signal, in V\n", + "\n", + "#Calculations\n", + "\n", + "#(i)\n", + "A_CM=A_DM/CMRR; #Common mode gain\n", + "\n", + "#(ii)\n", + "CMRR_dB=20*log10(CMRR); #Common mode rejection ratio in decibels\n", + "\n", + "#(iii)\n", + "V_out=A_DM*(Input_signal/pow(10,6)-0); #r.m.s output signal in V\n", + "\n", + "#(iv)\n", + "Interference_out=A_CM*Interference; #r.m.s interference output in V\n", + "Interference_out=Interference_out*1000; #r.m.s interference output in mV\n", + "\n", + "\n", + "#Results\n", + "print(\"Common mode gain =%.3f\"%A_CM);\n", + "print(\"Common mode rejection ratio in decibels=%.1fdB\"%CMRR_dB);\n", + "print(\"r.m.s output signal =%.2fV\"%V_out);\n", + "print(\"r.m.s interfernce output voltage = %dmV\"%Interference_out);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Common mode gain =0.083\n", + "Common mode rejection ratio in decibels=89.5dB\n", + "r.m.s output signal =1.25V\n", + "r.m.s interfernce output voltage = 83mV\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.6 : Page number 674-675\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12; #Collector supply voltage, V\n", + "VEE=12; #Emitter supply voltage, V\n", + "RB=10; #Base resistor, k\u03a9\n", + "RC2=10; #Collector resistor, k\u03a9\n", + "RE=25; #Emitter resistor, k\u03a9\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=100; #Base amplification factor\n", + "\n", + "#Calculation\n", + "VE=-VBE; #Emitter voltage, V (Ignoring the base current)\n", + "IE=(VEE-VBE)/RE; #Tail current, mA\n", + "IE1=IE/2; #Emitter current of 1st transistor, mA\n", + "IE2=IE1; #Emitter current of 2nd transistor, mA\n", + "IC1=IE1; #Collector current(= emitter current) of 1st transistor, mA\n", + "IC2=IC1; #Collector current of 2nd transistor, mA\n", + "IB1=(IC1/beta)*1000; #Base current of 1st transistor, \u03bcA\n", + "IB2=IB1; #Base current of 2nd transistor, \u03bcA\n", + "VC1=VCC; #Collector voltage of 1st transistor, V\n", + "VC2=VCC-IC2*RC2; #Collector voltage of 2nd transistor, V\n", + "\n", + "#Result\n", + "print(\"VE=%.1fV\"%VE);\n", + "print(\"IE=%.3fmA\"%IE);\n", + "print(\"IE1=%.3fmA\"%IE1);\n", + "print(\"IE2=%.3fmA\"%IE2);\n", + "print(\"IC1=%.3fmA\"%IC1);\n", + "print(\"IC2=%.3fmA\"%IC2);\n", + "print(\"IB1=%.2f\u03bcA\"%IB1);\n", + "print(\"IB2=%.2f\u03bcA\"%IB2);\n", + "print(\"VC1=%dV\"%VC1);\n", + "print(\"VC2=%.1fV\"%VC2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "VE=-0.7V\n", + "IE=0.452mA\n", + "IE1=0.226mA\n", + "IE2=0.226mA\n", + "IC1=0.226mA\n", + "IC2=0.226mA\n", + "IB1=2.26\u03bcA\n", + "IB2=2.26\u03bcA\n", + "VC1=12V\n", + "VC2=9.7V\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.7 : Page number 675\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15; #Collector supply voltage, V\n", + "VEE=15; #Emitter supply voltage, V\n", + "RB=33; #Base resistor, k\u03a9\n", + "RC=15; #Collector resistor, k\u03a9\n", + "RE=15; #Emitter resistor, k\u03a9\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "IE_tail=(VEE-VBE)/RE; #Tail current, mA\n", + "IE=round(IE_tail/2,3); #Emitter current in each transistor, mA\n", + "IC=IE; #Collector current(=emitter current), mA\n", + "Vout=VCC-IC*RC; #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"The output voltage=%.2fV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output voltage=7.85V.\n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.8 : Page number 675\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage, V\n", + "VEE=15.0; #Emitter supply voltage, V\n", + "RB=33.0; #Base resistor, k\u03a9\n", + "RC=15.0; #Collector resistor, k\u03a9\n", + "RE=15.0; #Emitter resistor, k\u03a9\n", + "VBE=0; #Base-emitter voltage, V\n", + "beta_dc_l=90.0; #base current amplification factor for left transistor\n", + "beta_dc_r=110.0; #base current amplification factor for right transistor\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IE_tail=(VEE-VBE)/RE; #Tail current, mA\n", + "IE=IE_tail/2; #Emitter current in each transistor, mA\n", + "IB1=(IE/beta_dc_l)*1000; #Base current of 1st transistor, \u03bcA\n", + "IB2=(IE/beta_dc_r)*1000; #Base current of 2nd transistor, \u03bcA\n", + "\n", + "#(ii)\n", + "VB1=-IB1/1000*RB; #Base voltage of 1st transistor, V\n", + "VB2=-IB2/1000*RB; #Base voltage of 1st transistor, V\n", + "\n", + "#Result\n", + "print(\"(i) IB1=%.2f\u03bcA\"%IB1);\n", + "print(\" IB2=%.2f\u03bcA\"%IB2);\n", + "print(\"(ii) VB1=%.3fV\"%VB1);\n", + "print(\" VB2=%.2fV\"%VB2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) IB1=5.56\u03bcA\n", + " IB2=4.55\u03bcA\n", + "(ii) VB1=-0.183V\n", + " VB2=-0.15V\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.9 : Page number 675-676\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage, V\n", + "VEE=15.0; #Emitter supply voltage, V\n", + "RB=10.0; #Base resistor, k\u03a9\n", + "RC1=10.0; #Collector resistor of 1st transistor, k\u03a9\n", + "RC2=10.0; #Collector resistor of 2nd transistor, k\u03a9\n", + "IE=1.0; #Tail current, mA\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "VE=-VBE; #Emitter voltage, V (Ignoring the base current)\n", + "IE1=IE/2.0; #Emitter current of 1st transistor, mA\n", + "IE2=IE1; #Emitter current of 2nd transistor, mA\n", + "IC1=IE1; #Collector current(= emitter current) of 1st transistor, mA\n", + "IC2=IE2; #Collector current of 2nd transistor, mA\n", + "VC1=VCC-IC1*RC1; #Collector voltage of 1st transistor, V\n", + "VC2=VCC-IC2*RC2; #Collector voltage of 2nd transistor, V\n", + "\n", + "\n", + "#Result\n", + "print(\"VE=%.1fV\"%VE);\n", + "print(\"Emitter current in each transistor=%.1fmA.\"%(IE/2.0));\n", + "print(\"IC1~IE1=%.1fmA and IC2~IE2=%.1fmA\"%(IE1,IE2));\n", + "print(\"VC1=VC2=%dV.\"%VC2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "VE=-0.7V\n", + "Emitter current in each transistor=0.5mA.\n", + "IC1~IE1=0.5mA and IC2~IE2=0.5mA\n", + "VC1=VC2=10V.\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.10 : Page number 676-677\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage, V\n", + "VEE=12.0; #Emitter supply voltage, V\n", + "RC2=10.0; #Collector resistor of 2nd transistor, k\u03a9\n", + "RE=25.0; #Emitter current, k\u03a9\n", + "VBE=-0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "VE=-VBE; #Emitter voltage, V (Ignoring the base current)\n", + "IE=(VCC-VE)/RE; #Tail current, mA\n", + "IE1=IE/2.0; #Emitter current of 1st transistor, mA\n", + "IE2=IE1; #Emitter current of 2nd transistor, mA\n", + "IC1=IE1; #Collector current(= emitter current) of 1st transistor, mA\n", + "IC2=IE2; #Collector current of 2nd transistor, mA\n", + "VC1=-VEE; #Collector voltage of 1st transistor, V\n", + "VC2=-VEE+IC2*RC2; #Collector voltage of 2nd transistor, V\n", + "\n", + "\n", + "#Result\n", + "print(\"VE=%.1fV\"%VE);\n", + "print(\"Tail current=%.3fmA.\"%IE);\n", + "print(\"Emitter current in each transistor=%.3fmA.\"%(IE/2.0));\n", + "print(\"IC1~IE1=%.3fmA and IC2~IE2=%.3fmA\"%(IC1,IC2));\n", + "print(\"VC1=%dV\"%VC1);\n", + "print(\"VC2=%.2fV\"%VC2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "VE=0.7V\n", + "Tail current=0.452mA.\n", + "Emitter current in each transistor=0.226mA.\n", + "IC1~IE1=0.226mA and IC2~IE2=0.226mA\n", + "VC1=-12V\n", + "VC2=-9.74V\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.11 : Page number 679\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15; #Collector supply voltage, V\n", + "VEE=15; #Emitter supply voltage, V\n", + "RB=1; #Base resistor, M\u03a9\n", + "RC2=1; #Collector resistor, M\u03a9\n", + "RE=1; #Emitter resistor, M\u03a9\n", + "VBE=0; #Base-emitter voltage, V (Neglected)\n", + "beta_dc_l=90.0; #base current amplification factor for left transistor\n", + "beta_dc_r=110.0; #base current amplification factor for right transistor\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "IE=(VEE-VBE)/RE; #Tail current, \u03bcA\n", + "IE1=IE/2.0; #Emitter current of 1st transistor, \u03bcA\n", + "IE2=IE1; #Emitter current of 2nd transistor, \u03bcA\n", + "IB1=round((IE1/beta_dc_l)*1000,1); #Base current of 1st transistor, nA\n", + "IB2=round((IE2/beta_dc_r)*1000,1); #Base current of 2nd transistor, nA\n", + "I_in_offset=IB1-IB2; #Input offset current, nA\n", + "\n", + "#(ii)\n", + "I_in_bias=(IB1+IB2)/2; #Input bias current, nA\n", + "\n", + "#Result\n", + "print(\"(i) The input offset current=%.1fnA\"%I_in_offset);\n", + "print(\"(ii) The input bias current=%.1fnA\"%I_in_bias);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The input offset current=15.1nA\n", + "(ii) The input bias current=75.8nA\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.12 : Page number 679\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_in_offset=20; #Input offset current, nA\n", + "I_in_bias=80; #Input bias current, nA\n", + "\n", + "#Calculation\n", + "IB1=I_in_bias+I_in_offset/2; #Base current in 1st transistor, nA\n", + "IB2=I_in_bias-I_in_offset/2; #Base current in 2nd transistor, nA\n", + "\n", + "\n", + "#Result\n", + "print(\"The two base currents are: IB1=%dnA and IB2=%dnA.\"%(IB1,IB2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The two base currents are: IB1=90nA and IB2=70nA.\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.13 : Page number 679-680\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declration\n", + "I_in_offset=20; #Input offset current, nA\n", + "I_in_bias=80; #Input bias current, nA\n", + "A=150; #Voltage gain\n", + "RB=100; #Base resistor, k\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "V_io=(I_in_offset*10**-9*RB*1000)*1000; #Input offset voltage, mV\n", + "V_out_offset=(A*V_io)/1000; #Output offset voltage, V\n", + "\n", + "#Result\n", + "print(\"The input offset voltage=%dmV.\"%V_io);\n", + "print(\"The output offset voltage=%.1fV.\"%V_out_offset);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The input offset voltage=2mV.\n", + "The output offset voltage=0.3V.\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.14 : Page number 682\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15; #Collector supply voltage, V\n", + "VEE=15; #Emitter supply voltage, V\n", + "RE=1; #Emitter resistor, M\u03a9\n", + "RC=1; #Collector resistor, M\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "IE=VEE/RE; #Tail current, \u03bcA\n", + "IE1=IE/2.0; #Emitter current of 1st transistor, \u03bcA\n", + "IE2=IE1; #Emitter current of 2nd transistor, \u03bcA\n", + "re=25/IE1; #a.c emitter resistance, k\u03a9\n", + "A_DM=RC/(2.0*re); #Differential voltage gain,\n", + "\n", + "#(i)\n", + "vin=1; #Input voltage, V\n", + "Vout=A_DM*vin; #Output voltage, V\n", + "\n", + "print(\"(i) Output voltage=%.2fV.\"%Vout);\n", + "\n", + "#(ii)\n", + "vin=-1; #Input voltage, V\n", + "Vout=A_DM*vin; #Output voltage, V;\n", + "print(\"(ii) Output voltage=%.2fV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Output voltage=0.15V.\n", + "(ii) Output voltage=-0.15V.\n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.15 : Page number 682-683\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12; #Collector supply voltage, V\n", + "VEE=12; #Emitter supply voltage, V\n", + "RE=100; #Emitter resistor, k\u03a9\n", + "RC1=120; #Collector resistor of 1st transistor, k\u03a9\n", + "RC2=120; #Collector resistor of 2nd transistor, k\u03a9\n", + "beta=220; #Base amplification factor\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calcualtion\n", + "IE=((VEE-VBE)/RE)*1000; #Tail current, \u03bcA\n", + "IE1=IE/2.0; #Emitter current of 1st transistor, \u03bcA\n", + "IE2=IE1; #Emitter current of 2nd transistor, \u03bcA\n", + "re=(25/IE1)*1000; #a.c emitter resistance, \u03a9\n", + "Zin=2*beta*re/1000; #Input impedance, k\u03a9\n", + "A_DM=RC1*1000/(2.0*re); #Differential voltage gain,\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) The input impedance=%dk\u03a9.\"%Zin);\n", + "print(\"(ii) The differential voltage gain=%.0f.\"%A_DM);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The input impedance=194k\u03a9.\n", + "(ii) The differential voltage gain=136.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.16: Page number 683-684\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12; #Collector supply voltage, V\n", + "VEE=12; #Emitter supply voltage, V\n", + "RE=200; #Emitter resistor, k\u03a9\n", + "RC=100; #Collector resistor, k\u03a9\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "#Calculation\n", + "IE=round((VEE-VBE)/RE,4); #Tail current, mA\n", + "IE1=round(IE/2,4); #Emitter current of 1st transistor, mA\n", + "IE2=IE1; #Emitter current of 2nd transistor, mA\n", + "re=round(25/IE1,1); #a.c emitter resistance, \u03a9\n", + "A_DM=RC*1000/(2*re); #Differential voltage gain,\n", + "\n", + "#Result\n", + "print(\"Differential voltage gain=%.1f.\"%A_DM);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Differential voltage gain=56.6.\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.17 : Page number 685-686\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "v1=0.5; #Voltage in terminal 1, mV\n", + "v2=-0.5; #Voltage in terminal 2, mV\n", + "vo=8.0; #Output voltage, V\n", + "vo_cm=12.0; #Common mode output, mV\n", + "\n", + "#Calculation\n", + "vin=v1-v2; #Differential input, mV\n", + "A_DM=vo/(vin/1000.0); #Differential mode gain,\n", + "vin_cm=1; #Common mode input, mV\n", + "A_CM=vo_cm/vin_cm; #Common mode gain\n", + "CMRR=A_DM/A_CM; #Common mode rejection ratio\n", + "CMRR_dB=20*log10(CMRR); #Common mode rejection ratio in dB\n", + "\n", + "#Result\n", + "print(\"Common mode rejection ratio=%.1f.\"%CMRR)\n", + "print(\"Common mode rejection ratio in decibel=%.2fdB\"%CMRR_dB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Common mode rejection ratio=666.7.\n", + "Common mode rejection ratio in decibel=56.48dB\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.18 : Page number 686\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_DM=200000; #Differential mode gain\n", + "CMRR_dB=90; #Common mode rejection ratio, dB\n", + "\n", + "#Calculation\n", + "CMRR=10**(CMRR_dB/20.0); #Common mode rejection ratio\n", + "A_CM=A_DM/CMRR; #Common mode gain\n", + "\n", + "\n", + "\n", + "#Result\n", + "print(\"Common mode voltage gain=%.2f.\"%A_CM);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Common mode voltage gain=6.32.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.19 : Page number 686\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "vin_cm=3.2; #Common input voltage, V\n", + "vout=26; #Output voltage, V\n", + "A_DM=100; #Open-circuit voltage gain\n", + "\n", + "#Calculation\n", + "#(i)\n", + "A_CM=vout*10**-3/vin_cm; #Common mode gain\n", + "\n", + "#(ii)\n", + "CMRR_dB=20*log10(A_DM/A_CM); #Common mode rejection ratio, dB\n", + "\n", + "#Result\n", + "print(\"(i) The Common mode gain=%.4f\"%A_CM);\n", + "print(\"(ii) The common mode rejection ratio=%.1fdB.\"%CMRR_dB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The Common mode gain=0.0081\n", + "(ii) The common mode rejection ratio=81.8dB.\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.20 : Page number 686-687\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "from math import floor\n", + "\n", + "#Variable declaration\n", + "VCC=12; #Collector supply voltage, V\n", + "VEE=12; #Emitter supply voltage, V\n", + "RE=200.0; #Emitter resistor, k\u03a9\n", + "RC=100.0; #Collector resistor, k\u03a9\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "A_CM=round(RC/(2*RE),2); #Common mode voltage gain\n", + "\n", + "#(ii)\n", + "IE=round((VEE-VBE)/RE,4); #Tail current, mA\n", + "IE1=round(IE/2,4); #Emitter current of 1st transistor, mA\n", + "IE2=IE1; #Emitter current of 2nd transistor, mA\n", + "re=round(25/IE1,1); #a.c emitter resistance, \u03a9\n", + "A_DM=RC*1000/(2*re); #Differential voltage gain,\n", + "CMRR_dB=floor(20*log10(A_DM/A_CM)*100)/100; #Common mode rejection ratio, dB\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) Common mode gain=%.2f\"%A_CM);\n", + "print(\"(ii)Common mode rejection ratio=%.2fdB\"%CMRR_dB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Common mode gain=0.25\n", + "(ii)Common mode rejection ratio=47.09dB\n" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.21 : Page number 691\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log10\n", + "\n", + "#Variable declaration\n", + "ACL=500; #closed loop gain\n", + "f_unity=15; #frequency with cloased-loop unity gain, MHz\n", + "\n", + "\n", + "#Calculation\n", + "f2=f_unity*1000/500 #Upper frequency of bandwidth,kHz\n", + "BW=f2-0; #Bandwidth, kHz\n", + "A_CL=f_unity*1000/200; #Maximum value of A_CL when f2=200kHz\n", + "A_CL_dB=20*log10(A_CL); #Maximum value of A_CL in decibel\n", + "\n", + "\n", + "#Result\n", + "print(\"f2=%dkHz\"%f2);\n", + "print(\"ACL=%d or %.1fdB.\"%(A_CL,A_CL_dB));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "f2=30kHz\n", + "ACL=75 or 37.5dB.\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.22 : Page number 691-692\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "GBW=1.5; #Gain-bandwidth, MHz\n", + "\n", + "#Calculation\n", + "#(i) For A_CL=1;\n", + "A_CL=1; #Closed loop gain\n", + "BW=GBW/A_CL; #Bandwidth, MHz\n", + "\n", + "print(\"(i) Operating Bandwidth=%.1fMHz.\"%BW);\n", + "\n", + "#(ii) For A_CL=10;\n", + "A_CL=10; #Closed loop gain\n", + "BW=(GBW/A_CL)*1000; #Bandwidth, kHz\n", + "\n", + "print(\"(ii) Operating Bandwidth=%dkHz.\"%BW);\n", + "\n", + "#(iii) For A_CL=100;\n", + "A_CL=100; #Closed loop gain\n", + "BW=(GBW/A_CL)*1000; #Bandwidth, kHz\n", + "\n", + "print(\"(iii) Operating Bandwidth=%dkHz.\"%BW);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Operating Bandwidth=1.5MHz.\n", + "(ii) Operating Bandwidth=150kHz.\n", + "(iii) Operating Bandwidth=15kHz.\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.23 : Page number 692\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "slew_rate=0.5; #Slew rate, V/\u03bcs\n", + "V_supply=10; #Supply voltage, V\n", + "\n", + "\n", + "#Calculation\n", + "V_sat=V_supply-2; #Saturation voltage, V\n", + "V_pk=V_sat; #Maximum peak-output voltage, V\n", + "f_max=((slew_rate*10**6)/(2*pi*V_pk))/1000; #Maximum operating frequency, kHz\n", + "\n", + "#Result\n", + "print(\"Maximum operating frequency=%.2fkHz.\"%f_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Maximum operating frequency=9.95kHz.\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.24 : Page number 692\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "slew_rate=0.5; #Slew rate, V/\u03bcs\n", + "V_pk=100.0; #Peak-output voltage, mV\n", + "\n", + "\n", + "#Calculation\n", + "V_pk=V_pk/1000.0; #Peak-output voltage, V\n", + "f_max=(slew_rate*10**6/(2*pi*V_pk))/1000.0; #Maximum operating frequency, kHz\n", + "\n", + "#Result\n", + "print(\"Maximum operating frequency=%.0fkHz\"%f_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Maximum operating frequency=796kHz\n" + ] + } + ], + "prompt_number": 31 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.25 : Page number 695-696\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_CL=-100; #Closed-loop voltage gain\n", + "Ri=2.2; #Input resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "#Since, A_CL=-(Rf/Ri)\n", + "Rf=-A_CL*Ri; #Feedback resistor, k\u03a9\n", + "\n", + "#Result\n", + "print(\"Feedback resistor=%dk\u03a9\"%Rf);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Feedback resistor=220k\u03a9\n" + ] + } + ], + "prompt_number": 32 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.26 : Page number 696\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "vin=2.5; #Input voltage, mV\n", + "Rf=200; #Feedback resistor, k\u03a9\n", + "Ri=2; #Input resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "A_CL=-(Rf/Ri); #Closed-loop voltage gain\n", + "vout=A_CL*vin/1000; #Output voltage,V\n", + "\n", + "#Result\n", + "print(\"Output voltage=%.2fV\"%vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=-0.25V\n" + ] + } + ], + "prompt_number": 33 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.27 : Page number 696\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Varaiable declaration\n", + "Rf=1.0; #Feedback resistor, k\u03a9\n", + "Ri=1.0; #Input resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "A_CL=-(Rf/Ri); #Closed-loop voltage gain\n", + "\n", + "#Result\n", + "print(\"Closed-loop voltage gain=%d\"%A_CL);\n", + "print(\"Therefore, output will have same amplitude but 180\u00b0 phase inversion.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Closed-loop voltage gain=-1\n", + "Therefore, output will have same amplitude but 180\u00b0 phase inversion.\n" + ] + } + ], + "prompt_number": 35 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.28 : Page number 696-697\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=40; #Feedback resistor, k\u03a9\n", + "Ri=1; #Input resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "A_CL=-(Rf/Ri); #Closed-loop voltage gain\n", + "\n", + "\n", + "#Result\n", + "print(\"Closed-loop voltage gain=%d\"%A_CL);\n", + "print(\"Supply voltage=\u00b115V, saturation voltage=\u00b113V. Since gain=-40, op-Amp will be driven to saturation.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Closed-loop voltage gain=-40\n", + "Supply voltage=\u00b115V, saturation voltage=\u00b113V. Since gain=-40, op-Amp will be driven to saturation.\n" + ] + } + ], + "prompt_number": 36 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.29 : Page number 697\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "Rf=100; #Feedback resistor, k\u03a9\n", + "Ri=10; #Input resistor, k\u03a9\n", + "Vpp=1; #Input peak-peak voltage, V\n", + "slew_rate=0.5; #Slew rate, V//\u03bcs\n", + "\n", + "#Calculation\n", + "#(i)\n", + "A_CL=-(Rf/Ri); #Closed-loop voltage gain\n", + "\n", + "#(ii)\n", + "Zi=Ri; #Input impedance(~ Input resistor), k\u03a9\n", + "\n", + "#(iii)\n", + "Vout=A_CL*Vpp; #Peak-to-peak voltage, V\n", + "Vpk=Vout/2; #Peak output voltage, V\n", + "f_max=(slew_rate*10**6/(2*pi*abs(Vpk)))/1000; #Maximum operating frequency, kHz\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) A_CL=%d.\"%A_CL);\n", + "print(\"(ii) Zi=%dk\u03a9\"%Zi);\n", + "print(\"(iii) Maximum operating frequency=%.1fkHz.\"%f_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) A_CL=-10.\n", + "(ii) Zi=10k\u03a9\n", + "(iii) Maximum operating frequency=15.9kHz.\n" + ] + } + ], + "prompt_number": 37 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.30 : Page number 697\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A_CL=-4; #Closed loop voltage gain\n", + "R=[1.0,5.0,10.0,20.0]; #List of available resistors, k\u03a9\n", + "\n", + "#Calculation\n", + "for i in R[:]:\n", + " for j in R[:]:\n", + " if -(i/j)==A_CL :\n", + " print(\"Rf=%dk\u03a9 and Ri=%dk\u03a9.\"%(i,j));\n", + " break;\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Rf=20k\u03a9 and Ri=5k\u03a9.\n" + ] + } + ], + "prompt_number": 38 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.31 : Page number 697-698\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=100; #Feedback resistor, k\u03a9\n", + "Ri=1; #Input resistor, k\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "R_source=0; #Source resistor, k\u03a9\n", + "A_CL=-Rf/(R_source+Ri); #Closed-loop voltage gain\n", + "\n", + "print(\"(i) Closed loop voltage gain=%d.\"%A_CL);\n", + "\n", + "#(ii)\n", + "R_source=1; #Source resistor, k\u03a9\n", + "A_CL=-Rf/(R_source+Ri); #Closed-loop voltage gain\n", + "\n", + "print(\"(ii) Closed loop voltage gain=%d.\"%A_CL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Closed loop voltage gain=-100.\n", + "(ii) Closed loop voltage gain=-50.\n" + ] + } + ], + "prompt_number": 39 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.32 : Page number 699-700\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=240; #Feedback resistor, k\u03a9\n", + "Ri=2.4; #Input resistor, k\u03a9\n", + "Vin=120; #Input voltage, \u03bcV\n", + "\n", + "\n", + "#Calculation\n", + "A_CL=1+(Rf/Ri); #Closed loop voltage gain\n", + "Vout=(A_CL*Vin)/1000; #Output voltage, mV\n", + "\n", + "#Result\n", + "print(\"Output voltage=%.2fmV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=12.12mV\n" + ] + } + ], + "prompt_number": 40 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.33 : Page number 700\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=10; #Feedback resistor, k\u03a9\n", + "Ri=1; #Input resistor, k\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "A_CL=1+(Rf/Ri); #Closed loop voltage gain\n", + "#(i)\n", + "Vin=1; #Input voltage, V\n", + "Vout=A_CL*Vin; #Output voltage, V\n", + "\n", + "print(\"(i) Output voltage=%dV\"%Vout);\n", + "\n", + "\n", + "#(ii)\n", + "Vin=-1; #Input voltage, V\n", + "Vout=A_CL*Vin; #Output voltage, V\n", + "\n", + "print(\"(ii) Output voltage=%dV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Output voltage=11V\n", + "(ii) Output voltage=-11V\n" + ] + } + ], + "prompt_number": 41 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.34 : Page number 700\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=5; #Feedback resistor, k\u03a9\n", + "Ri=1; #Input resistor, k\u03a9\n", + "Vin_max=1; #Maximum input voltage, V\n", + "Vin_min=-1; #Minimum input voltage, V\n", + "\n", + "#Calculation\n", + "V_inpp=Vin_max-Vin_min; #Peak-peak input voltage, V\n", + "A_CL=1+(Rf/Ri); #Closed loop voltage gain\n", + "Vout_pp=A_CL*V_inpp; #Peak-peak output voltage, V\n", + "\n", + "#Result\n", + "print(\"Peak to peak output voltage=%dV\"%Vout_pp);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Peak to peak output voltage=12V\n" + ] + } + ], + "prompt_number": 42 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.35 : Page number 700-701\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "Rf=100; #Feedback resistor, k\u03a9\n", + "Ri=10; #Input resistor, k\u03a9\n", + "Vpp=1; #Input peak-peak voltage, V\n", + "slew_rate=0.5; #Slew rate, V/\u03bcs\n", + "\n", + "#Calculation\n", + "#(i)\n", + "A_CL=1+(Rf/Ri); #Closed loop voltage gain\n", + "\n", + "#(ii)\n", + "Vout_pp=A_CL*Vpp; #Peak-peak output voltage, V\n", + "Vpk=Vout_pp/2.0; #Peak output voltage, V\n", + "f_max=((slew_rate*10**6)/(2*pi*Vpk))/1000.0; #Maximum operating frequency, kHz\n", + "\n", + "#Result\n", + "print(\"(i) Closed-loop voltage gain=%d\"%A_CL);\n", + "\n", + "print(\"(ii) Maximum operating frequency=%.2fkHz\"%f_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Closed-loop voltage gain=11\n", + "(ii) Maximum operating frequency=14.47kHz\n" + ] + } + ], + "prompt_number": 45 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.36 : Page number 701\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=220; #Feedback resistor, k\u03a9\n", + "Ri=3.3; #Input resistor, k\u03a9\n", + "unity_gain_BW=3; #Unity gain bandwidth, MHz\n", + "\n", + "#Calculation\n", + "#(i) For non-inverting amplifier\n", + "A_CL=1+(Rf/Ri); #Closed loop voltage gain\n", + "BW=unity_gain_BW*1000.0/A_CL; #Bandwidth, kHz\n", + "\n", + "print(\"(i) Bandwidth=%.1fkHz.\"%BW);\n", + "\n", + "#(ii) For inverting amplifier\n", + "Rf=47; #Feedback resistor, k\u03a9\n", + "Ri=1; #Input resistor, k\u03a9\n", + "A_CL=-(Rf/Ri); #Closed loop voltage gain\n", + "BW=unity_gain_BW*1000.0/abs(A_CL); #Bandwidth, kHz\n", + "\n", + "print(\"(ii) Bandwidth=%.1fkHz.\"%BW);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Bandwidth=44.3kHz.\n", + "(ii) Bandwidth=63.8kHz.\n" + ] + } + ], + "prompt_number": 47 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.37 : Page number 701-702\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#(i)\n", + "A_CL=1; #Closed loop voltage gain for voltage follower\n", + "print(\"(i) For voltage follower A_CL=1.\");\n", + "\n", + "\n", + "#(ii)\n", + "slew_rate=0.5; #Slew rate, V/\u03bcs\n", + "V_inpp=6; #peak-peak input voltage, V\n", + "Vout=A_CL*V_inpp; #Peak-peak output voltage, V\n", + "Vpk=Vout/2; #Peak output voltage, V\n", + "\n", + "f_max=(slew_rate*10**6/(2*pi*Vpk))/1000; #Maximum operating frequency, kHz\n", + "\n", + "#Result\n", + "print(\"(ii) The maximum output frequency=%.2fkHz.\"%f_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) For voltage follower A_CL=1.\n", + "(ii) The maximum output frequency=26.53kHz.\n" + ] + } + ], + "prompt_number": 48 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.38 : Page number 702\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=470.0; #Feedback resistor, k\u03a9\n", + "R1=4.3; #Input resistor of 1st op-Amp, k\u03a9\n", + "R2=33.0; #Input resistor of 2nd op-Amp, k\u03a9\n", + "R3=33.0; #Input resistor of 3rd op-Amp, k\u03a9\n", + "Vin=80.0; #Input voltage, \u03bcV.\n", + "\n", + "#Calculation\n", + "A1=1+Rf/R1; #Gain of first op-Amp\n", + "A2=-round(Rf/R2,1); #Gain of second op-Amp\n", + "A3=-round(Rf/R3,1); #Gain of third op-Amp\n", + "A=A1*A2*A3; #Overall gain\n", + "Vout=A*Vin*10**-6; #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Output voltage=%.2fV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=1.78V\n" + ] + } + ], + "prompt_number": 50 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.39 : Page number 702-703\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "A1=10; #Voltage gain of 1st op-Amp\n", + "A2=-18; #Voltage gain of 2nd op-Amp\n", + "A3=-27; #Voltage gain of 3rd op-Amp\n", + "Rf=270; #Feedback resistor, k\u03a9\n", + "Vin=150; #Input voltage, \u03bcV \n", + "\n", + "\n", + "#Calculation\n", + "R1=Rf/(A1-1); #Input resistor of 1st op-Amp, k\u03a9\n", + "R2=-Rf/A2; #Input resistr of 2nd op-Amp, k\u03a9\n", + "R3=-Rf/A3; #Input resistor of 3rd op-Amp, k\u03a9\n", + "\n", + "A=A1*A2*A3; #overall gain,\n", + "Vout=Vin*10**-6*A; #Output voltage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"R1=%dk\u03a9, R2=%dk\u03a9 and R3=%dk\u03a9.\"%(R1,R2,R3));\n", + "print(\"Output voltage=%.3fV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "R1=30k\u03a9, R2=15k\u03a9 and R3=10k\u03a9.\n", + "Output voltage=0.729V.\n" + ] + } + ], + "prompt_number": 51 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.40 : Page number 703-704\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=500; #Feedback resistor, k\u03a9\n", + "A1=-10; #Gain of 1st op-Amp\n", + "A2=-20; #Gain of 2nd op-Amp\n", + "A3=-50; #Gain of 3rd op-Amp\n", + "\n", + "#Calculation\n", + "R1=-Rf/A1; #Input resistor of 1st op-Amp, k\u03a9\n", + "R2=-Rf/A2; #Input resistor of 2nd op-Amp, k\u03a9\n", + "R3=-Rf/A3; #Input resistor of 3rd op-Amp, k\u03a9\n", + "\n", + "\n", + "#Result\n", + "print(\"R1=%dk\u03a9, R2=%dk\u03a9 and R3=%dk\u03a9.\"%(R1,R2,R3));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "R1=50k\u03a9, R2=25k\u03a9 and R3=10k\u03a9.\n" + ] + } + ], + "prompt_number": 52 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.41 : Page number 705\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Zin=2.0; #Input impedance of op-Amp, M\u03a9\n", + "Zout=75.0; #Output impedance of op-Amp, \u03a9\n", + "A_OL=200000.0; #Open-loop voltage gain\n", + "Rf=220.0; #Feedback resistor, k\u03a9\n", + "Ri=10.0; #Input resistor, k\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "mv=round(Ri/(Ri+Rf),3); #Feedback fraction\n", + "Zin_NI=Zin*(1+(A_OL*mv)); #Input impedance, M\u03a9\n", + "Zout_NI=Zout/(1+A_OL*mv); #Output impedance, \u03a9\n", + "\n", + "#(ii)\n", + "A_CL=1+Rf/Ri; #Closed loop voltage gain\n", + "\n", + "#Result\n", + "print(\"(i) The input impedance=%dM\u03a9 and output impedance=%.1e\u03a9.\"%(Zin_NI,Zout_NI));\n", + "print(\"(ii) The closed loop voltage gain=%d.\"%A_CL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The input impedance=17202M\u03a9 and output impedance=8.7e-03\u03a9.\n", + "(ii) The closed loop voltage gain=23.\n" + ] + } + ], + "prompt_number": 54 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.42 : Page number 705-706\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "#For voltage follower,\n", + "mv=1.0; #Feedback fraction\n", + "A_OL=200000.0; #Open-loop voltage gain\n", + "Zin=2.0; #Input impedance of op-Amp, M\u03a9\n", + "Zout=75.0; #Output impedance of op-Amp, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "Zin_VF=Zin*(1+(A_OL*mv)); #Input impedance, M\u03a9\n", + "Zout_VF=round(round(Zout/(1+A_OL*mv),6),5); #Output impedance, \u03a9\n", + "\n", + "#Result\n", + "print(\"The input impedance=%dM\u03a9 and output impedance=%.2fe-03\u03a9.\"%(Zin_VF,Zout_VF*1000));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The input impedance=400002M\u03a9 and output impedance=0.38e-03\u03a9.\n" + ] + } + ], + "prompt_number": 63 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.43 : Page number 706\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=100; #Feedback resistor, k\u03a9\n", + "Ri=1.0; #Input resistor, k\u03a9\n", + "Zin=4; #Input impedance of op-Amp, M\u03a9\n", + "Zout=50; #Output impedance of op-Amp, \u03a9\n", + "\n", + "\n", + "#Calculation\n", + "Zin_I=Ri; #Input impedance, k\u03a9\n", + "Zout_I=Zout; #Output impedance, \u03a9\n", + "A_CL=-(Rf/Ri); #Closed loop voltage gain\n", + "\n", + "\n", + "#Result\n", + "print(\"The input impedance=%dk\u03a9 and output impedance=%d\u03a9.\"%(Zin_I,Zout_I));\n", + "print(\"Closed-loop voltage gain=%d\"%A_CL);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The input impedance=1k\u03a9 and output impedance=50\u03a9.\n", + "Closed-loop voltage gain=-100\n" + ] + } + ], + "prompt_number": 65 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.44 : Page number 709\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=10; #Feedback resistor, k\u03a9\n", + "Ri=10; #Input resistor, k\u03a9\n", + "V1=3; #Input voltage 1st, V\n", + "V2=1; #Input voltage 2nd, V\n", + "V3=8; #Input voltage 3rd, V\n", + "\n", + "\n", + "#Calculation\n", + "#Since, Rf=Ri, Vout=-(Rf/Ri)*(V1+V2+V3)= -(V1+V2+V3);\n", + "Vout=-(V1+V2+V3); #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Output voltage=%dV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=-12V.\n" + ] + } + ], + "prompt_number": 66 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.45 : Page number 709\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=10; #Feedback resistor, k\u03a9\n", + "R1=1; #Input resistor for input 1, k\u03a9\n", + "R2=1; #Input resistor for input 2, k\u03a9\n", + "V1=0.2; #Input voltage 1st, V\n", + "V2=0.5; #Input voltage 2nd, V\n", + "\n", + "\n", + "#Calculation\n", + "R=R1; #Input resistor(=R1 or R2), k\u03a9\n", + "Vout=-(Rf/R)*(V1+V2); #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Output voltage=%dV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=-7V.\n" + ] + } + ], + "prompt_number": 67 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.46 : Page number 709-710\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=1; #Feedback resistor, k\u03a9\n", + "Ri=10.0; #Input resistor, k\u03a9\n", + "V1=10; #Input voltage 1st, V\n", + "V2=8.0; #Input voltage 2nd, V\n", + "V3=7.0; #Input voltage 3rd, V\n", + "\n", + "\n", + "#Calculation\n", + "#Since, Vout=-(Rf/Ri)*(V1+V2+V3);\n", + "Vout=-(Rf/Ri)*(V1+V2+V3); #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Output voltage=%.1fV.\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=-2.5V.\n" + ] + } + ], + "prompt_number": 70 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.47 : Page number 710\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V1=0.6; #Input voltage to 1st input resistor, V\n", + "V2=-1.4; #Input voltage to 2nd input resistor, V\n", + "Rf=200; #Feedback resistor, k\u03a9\n", + "R1=400; #Input resistor 1, k\u03a9\n", + "R2=100.0; #Input resistor 2, k\u03a9\n", + "\n", + "#Calculation\n", + "Vout=-Rf*(V1/R1 +V2/R2); #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Output voltage=%.1fV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Output voltage=2.5V\n" + ] + } + ], + "prompt_number": 71 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.48 : Page number 710-711\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=1.0; #Feedback resistor, k\u03a9\n", + "R1=1.0; #Input resistor 1, k\u03a9\n", + "R2=2.0; #Input resistor 2, k\u03a9\n", + "R3=4.0; #Input resistor 3, k\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "Rf_R1=Rf/R1; #Ratio of feedback resistor and 1st input resistor\n", + "Rf_R2=Rf/R2; #Ratio of feedback resistor and 2nd input resistor\n", + "Rf_R3=Rf/R3; #Ratio of feedback resistor and 3rd input resistor\n", + "\n", + "#(i) First input combination\n", + "V1=10; #Input voltage to 1st input resistor, V\n", + "V2=0; #Input voltage to 2nd input resistor, V\n", + "V3=10; #Input voltage to 3rd input resistor, V\n", + "Vout=-(V1*Rf_R1 +V2*Rf_R2 +V3*Rf_R3); #Output voltage, V\n", + "print(\"(i) The output voltage=%.1fV\"%Vout);\n", + "\n", + "#(i) First input combination\n", + "V1=0; #Input voltage to 1st input resistor, V\n", + "V2=10; #Input voltage to 2nd input resistor, V\n", + "V3=10; #Input voltage to 3rd input resistor, V\n", + "Vout=-(V1*Rf_R1 +V2*Rf_R2 +V3*Rf_R3); #Output voltage, V\n", + "print(\"(ii) The output voltage=%.1fV\"%Vout);\n", + "\n", + "\n", + "#(i) First input combination\n", + "V1=10; #Input voltage to 1st input resistor, V\n", + "V2=10; #Input voltage to 2nd input resistor, V\n", + "V3=10; #Input voltage to 3rd input resistor, V\n", + "Vout=-(V1*Rf_R1 +V2*Rf_R2 +V3*Rf_R3); #Output voltage, V\n", + "print(\"(iii) The output voltage=%.1fV\"%Vout);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The output voltage=-12.5V\n", + "(ii) The output voltage=-7.5V\n", + "(iii) The output voltage=-17.5V\n" + ] + } + ], + "prompt_number": 72 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.49 : Page number 711\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Rf=330; #Feedback resistor, k\u03a9\n", + "R1=33.0; #Input resistor 1, k\u03a9\n", + "R2=10.0; #Input resistor 2, k\u03a9\n", + "V1_m=50; #Peak voltage of 1st input, mV\n", + "V2_m=10; #Peak voltage of 2nd input, mV\n", + "\n", + "#Calculation\n", + "#Since, Vout=-((Rf/R1)*V1 + (Rf/R2)*V2)\n", + "print(\"Vout=-[%.1fsin(1000t)+%.2fsin(3000t)]V\"%((V1_m/1000.0)*(Rf/R1),(V2_m/1000.0)*(Rf/R2)));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vout=-[0.5sin(1000t)+0.33sin(3000t)]V\n" + ] + } + ], + "prompt_number": 74 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.50 : Page number 715\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=100; #Input resistor, k\u03a9\n", + "C=10; #Feedback capacitor, \u03bcF\n", + "\n", + "#Calculation\n", + "RC=R*10**3*C*10**-6; #product of input resistance and feedback capacitance, s\n", + "\n", + "\n", + "#Result\n", + "print(\"Vo=-1*(1/RC)\u222bvi dt.\");\n", + "print(\"=>Vo=-1*(1/%d)\u222bvi dt\"%RC);\n", + "print(\"=>Vo=\u222bvi dt\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vo=-1*(1/RC)\u222bvi dt.\n", + "=>Vo=-1*(1/1)\u222bvi dt\n", + "=>Vo=\u222bvi dt\n" + ] + } + ], + "prompt_number": 75 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.51 : Page number 715-716\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "\n", + "#Variable declaration\n", + "Rf=100; #Feedback resistor, k\u03a9\n", + "C=0.01; #Feedback capacitor, \u03bcF\n", + "\n", + "\n", + "#Calculation\n", + "fc=1/(2*pi*Rf*1000*C*10**-6); #Crictical frequency, Hz\n", + "\n", + "#Result\n", + "print(\"The critical frequency=%dHz.\"%fc);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The critical frequency=159Hz.\n" + ] + } + ], + "prompt_number": 76 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.52 : Page number 716\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "R=10.0; #Input resistor, k\u03a9\n", + "C=0.01; #Feedback capacitor, \u03bcF\n", + "vin=5; #Input voltage, V\n", + "\n", + "#Calculation\n", + "#(i)\n", + "Vout_change_rate=-vin/(R*C); #Rate of change of output voltage, V/\u03bcs \n", + "print(\"(i) Vout=-1*(1/RC)\u222bvi dt.\");\n", + "print(\" \u0394Vout/dt = -vin/RC = %dmV/\u03bcs.\"%Vout_change_rate);\n", + "\n", + "#(ii) Plotting the output waveform\n", + "vin_plot=[]; #Plotting variable for input waveform, V\n", + "dt=100; #time between edges, \u03bcs\n", + "for i in range(0,3*dt+1):\n", + " if i<dt or i>2*dt :\n", + " vin_plot.append(0);\n", + " else:\n", + " vin_plot.append(5); \n", + "p=plot(vin_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,300])\n", + "limit.set_ylim([-5,10])\n", + "xlabel(\"t(microsecond)\");\n", + "ylabel(\"Vin(V)\");\n", + "title(\"Input waveform\");\n", + "show(p);\n", + "\n", + " \n", + "vout_plot=[]; #Plotting variable for output waveform, V\n", + "t=[i for i in range(0,301)]; #Time scale, \u03bcs\n", + "for i in t[:] :\n", + " if i<dt:\n", + " vout_plot.append(0);\n", + " elif i>2*dt:\n", + " vout_plot.append((Vout_change_rate/1000.0)*dt);\n", + " else :\n", + " vout_plot.append((-vin_plot[i]/(R*C))/1000*(i-dt));\n", + "\n", + " \n", + "p=plot(vout_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,300])\n", + "limit.set_ylim([-5,5]);\n", + "xlabel('t(microsecond)');\n", + "ylabel(\"Vout(V)\");\n", + "title(\"output waveform\");\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Vout=-1*(1/RC)\u222bvi dt.\n", + " \u0394Vout/dt = -vin/RC = -50mV/\u03bcs.\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7fdd137a8390>" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.53 : Page number 716-717\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_supply=15; #Supply voltage, V\n", + "R=10; #Input resistor, k\u03a9\n", + "C=0.2; #Feedback capacitor, \u03bcF\n", + "vin=10; #Input voltage, mV\n", + "\n", + "\n", + "#Calculation\n", + "Vs=-V_supply+2; #Saturation voltage, V\n", + "print(\"Vout=-1*(1/RC)\u222bvi dt.\");\n", + "print(\"Vout=%d*t volts\"%(-vin/(R*C)));\n", + "t=Vs/(-vin/(R*C)); #Time required, seconds\n", + "print(\"Time required=%.1fseconds.\"%t);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vout=-1*(1/RC)\u222bvi dt.\n", + "Vout=-5*t volts\n", + "Time required=2.6seconds.\n" + ] + } + ], + "prompt_number": 78 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.54 : Page number 717-718\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=1; #Feedback resistor, k\u03a9\n", + "C=0.1; #Input capacitor, \u03bcF\n", + "Vin_change=5; #Change in input voltage, V\n", + "t=0.1; #Time taken for change in input voltage, ms\n", + "\n", + "#Calcualtion\n", + "dvi_dt=Vin_change/(t/1000); #Rate of change of input voltage, V/s\n", + "RC=R*1000*C*10**-6; #Product of feedback resistance and input capacitance, s\n", + "#Since, Vo=-R*C*(dvi/dt);\n", + "Vo=-RC*dvi_dt; #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Vo=%dV.\"%Vo);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vo=-5V.\n" + ] + } + ], + "prompt_number": 79 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.55 : Page number 718\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=10; #Feedback resistor, k\u03a9\n", + "C=2.2; #Input capacitor, \u03bcF\n", + "Vin_change=10; #Change in input voltage, V\n", + "t=0.4; #Time taken for change in input voltage, s\n", + "\n", + "#Calcualtin\n", + "dvi_dt=Vin_change/t; #Rate of change of input voltage, V/s\n", + "RC=R*1000*C*10**-6; #Product of feedback resistance and input capacitance, s\n", + "#Since, Vo=-R*C*(dvi/dt);\n", + "Vo=-RC*dvi_dt; #Output voltage, V\n", + "\n", + "#Result\n", + "print(\"Vo=%.2fV.\"%Vo);\n", + "print(\"The output voltage stays constant at %.2fV.\"%Vo);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vo=-0.55V.\n", + "The output voltage stays constant at -0.55V.\n" + ] + } + ], + "prompt_number": 80 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 25.56 : Page number 718-719\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R=100; #Feedback resistor, k\u03a9\n", + "C=10; #Input capacitor, \u03bcF\n", + "Vin_change=1; #Change in input voltage, V\n", + "t=0.2; #Time taken for change in input voltage, s\n", + "\n", + "\n", + "#Calculation\n", + "RC=R*1000*C*10**-6; #Product of feedback resistor and input capacitance, s\n", + "#(i)\n", + "print(\"vo=-%d*(dvi/dt).\"%RC);\n", + "\n", + "#(ii)\n", + "dvi_dt=Vin_change/t; #Rate of change of input voltage, V\n", + "vo=-dvi_dt; #Output voltage, V\n", + "print(\"vo=%dV.\"%vo);\n", + "\n", + "print(\"Therefore, between 0 to 0.2s, the output voltage is constant at %dV.\"%vo);\n", + "print(\"For t>0.2s, the input is constant so that output voltage is zero.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "vo=-1*(dvi/dt).\n", + "vo=-5V.\n", + "Therefore, between 0 to 0.2s, the output voltage is constant at -5V.\n", + "For t>0.2s, the input is constant so that output voltage is zero.\n" + ] + } + ], + "prompt_number": 82 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter26_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter26_1.ipynb new file mode 100644 index 00000000..670a61b0 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter26_1.ipynb @@ -0,0 +1,472 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:a1845801144904256bc26f3ca2e0294eb55dcabb139a523d403624121bc6876a" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "#CHAPTER 26 : DIGITAL ELECTRONICS" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.1 : Page 732" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given\n", + "d=37; #Given decimal number\n", + "\n", + "#Calculation\n", + "b=int(bin(d)[2:]); #Equivalent Octal number \n", + "\n", + "#Result\n", + "print(\"The equivalent binary number=%s.\"%b);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The equivalent binary number=100101.\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.2 : Page number 733" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given\n", + "d=23; #Given decimal number\n", + "\n", + "#Calculation\n", + "b=int(bin(d)[2:]); #Equivalent Octal number\n", + "\n", + "#Result\n", + "print(\"The equivalent binary number=%d.\"%b);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The equivalent binary number=10111.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.3 : Page number 733" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given \n", + "b=0b110001; #Given binary number\n", + "\n", + "#Calculation\n", + "d=int(b); #Equivalent decimal number\n", + "\n", + "#Result\n", + "print(\"Equivalent decimal number=%d.\"%d);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Equivalent decimal number=49.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.4 : Page number 735" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given \n", + "d1=76; #Given decimal number\n", + "d2=255; #Given decimal number\n", + "d3=372; #Given decimal number\n", + "\n", + "#Calculation\n", + "o1=int(oct(d1)[1:]); #Equivalent octal number\n", + "o2=int(oct(d2)[1:]); #Equivalent octal number\n", + "o3=int(oct(d3)[1:]); #Equivalent octal number\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) Equivalent octal number=%d.\"%o1);\n", + "print(\"(ii) Equivalent octal number=%d.\"%o2);\n", + "print(\"(iii) Equivalent octal number=%d.\"%o3);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Equivalent octal number=114.\n", + "(ii) Equivalent octal number=377.\n", + "(iii) Equivalent octal number=564.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.5 : Page number 735" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given \n", + "o=24.6; #Given octal number\n", + "\n", + "#Calculation\n", + "o_f=o%1; #Floating part of octal number\n", + "o_i=(int)(o-(o%1)); #Integer part of octal number\n", + "d=int(str(o_i),8); #Equivalent decimal number\n", + "\n", + "s=str(o_f); #String value of floating part \n", + "i=2\n", + "while(i<len(s)):\n", + " d=d+int(s[i])*8**-(i-1);\n", + " i+=1;\n", + "#Result\n", + "print(\"Equivalent decimal number=%.2f.\"%d);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Equivalent decimal number=20.75.\n" + ] + } + ], + "prompt_number": 64 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.6 : Page number 735" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given \n", + "d=177; #Given decimal number\n", + "\n", + "#Calculation\n", + "o=oct(d)[1:]; #Equivalent octal number\n", + "\n", + "b=\"\";\n", + "for i in o:\n", + " bo=bin(int(i))[2:]; #Binary of individual octal digit\n", + " b=b+((\"0\" if len(bo)==2 else (\"00\" if len(bo)==1 else\"\")) +bo); #Equivalent binary number\n", + " \n", + "#Result\n", + "print(\"Equivalent octal number=%s.\"%o);\n", + "print(\"Equivalent binary number=%s.\"%b);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Equivalent octal number=261.\n", + "Equivalent binary number=010110001.\n" + ] + } + ], + "prompt_number": 63 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.7 : Page number 737" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given \n", + "d=541; #Given decimal number\n", + "\n", + "#Calculation\n", + "h=hex(d)[2:]; #Equivalent hexadecimal number\n", + "\n", + "#Result\n", + "print(\"Equivalent hexadecimal number=%s.\"%h);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Equivalent hexadecimal number=21d.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.8 : Page number 737" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "hex_to_dec={'0':0,'1':1,'2':2,'3':3,'4':4,'5':5,'6':6,'7':7,'8':8,'9':9,'a':10,'b':11,'c':12,'d':13,'e':14,'f':15};\n", + " \n", + "#Given \n", + "d=378; #Given decimal number\n", + "\n", + "#Calculation\n", + "h=hex(d)[2:]; #Equivalent Hexadecimal number\n", + "\n", + "\n", + "b=\"\";\n", + "for i in h:\n", + " bh=bin(hex_to_dec[i])[2:]; #Binary of individual hexadecimaldigit\n", + " b=b+((\"0\" if len(bh)==3 else (\"00\" if len(bh)==2 else (\"000\" if len(bh)==1 else \"\")))+bh); #Equivalent binary number\n", + "\n", + "#Result\n", + "print(\"Equivalent hexadeciaml number=%s.\"%h);\n", + "print(\"Equivalent binary number=%s.\"%b);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Equivalent hexadeciaml number=17a.\n", + "Equivalent binary number=000101111010.\n" + ] + } + ], + "prompt_number": 56 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 26.9 : Page number 737" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given\n", + "h=0xB2F; #Given hexadecimal number\n", + "\n", + "#Calculation\n", + "o=oct(h)[1:]; #Equivalent octal number\n", + "\n", + "#Result\n", + "print(\"Equivalent octal number=%s.\"%o);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Equivalent octal number=5457.\n" + ] + } + ], + "prompt_number": 58 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.10 : Page number 738" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Given\n", + "BCD=\"0100 0000 0010\" #Given BCD string\n", + "BCD_split=BCD.split(\" \"); #Splitting th binary string into individual BCD \n", + "d=0;\n", + "for i in range(len(BCD_split),0,-1):\n", + " d+=int(BCD_split[len(BCD_split)-i],2)*10**(i-1);\n", + "\n", + "#Result\n", + "print(\"The equivalent decimal =%d.\"%d);\n", + " " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The equivalent decimal =402.\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.11 : Page number 745" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "print(\"Boolean Expression obtained from the circuit: \\n Y'=A+B \\n Y=((A+B).A)\");\n", + "print(\"Truth Table:\");\n", + "print(\"a\\tb\\tY'=A+B\\t Y=Y'.A\");\n", + "for b in range(0,2):\n", + " for a in range(0,2):\n", + " Y_dash=1 if a or b else 0;\n", + " Y=1 if Y_dash and a else 0;\n", + " print(\"%d\\t%d\\t%d\\t %d\"%(a,b,Y_dash,Y));" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Boolean Expression obtained from the circuit: \n", + " Y'=A+B \n", + " Y=((A+B).A)\n", + "Truth Table:\n", + "a\tb\tY'=A+B\t Y=Y'.A\n", + "0\t0\t0\t 0\n", + "1\t0\t1\t 1\n", + "0\t1\t1\t 0\n", + "1\t1\t1\t 1\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 26.12 : Page number 745-746" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "print(\"Boolean Expression obtained from the circuit: \\n Y'=A'.B \\n Y=Y'+B'\");\n", + "print(\"Truth Table:\");\n", + "print(\"A\\tB\\tA'\\tY'=A'.B\\t B'\\tY=Y'+B'\");\n", + "for b in range(0,2):\n", + " for a in range(0,2):\n", + " a_dash=1 if not a else 0;\n", + " b_dash=1 if not b else 0;\n", + " Y_dash=1 if a_dash and b else 0;\n", + " Y=1 if Y_dash or b_dash else 0;\n", + " print(\"%d\\t%d\\t%d\\t%d\\t %d\\t%d\"%(a,b,a_dash,Y_dash,b_dash,Y));" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Boolean Expression obtained from the circuit: \n", + " Y'=A'.B \n", + " Y=Y'+B'\n", + "Truth Table:\n", + "A\tB\tA'\tY'=A'.B\t B'\tY=Y'+B'\n", + "0\t0\t1\t0\t 1\t1\n", + "1\t0\t0\t0\t 1\t1\n", + "0\t1\t1\t1\t 0\t1\n", + "1\t1\t0\t0\t 0\t0\n" + ] + } + ], + "prompt_number": 30 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter2_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter2_1.ipynb new file mode 100644 index 00000000..06a555a6 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter2_1.ipynb @@ -0,0 +1,125 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:c0ff4f67576afe73a11c06eedd0a50709b7f5831737f83db1cd640098e3e9740" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 2 : ELECTRONIC EMISSION" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 2.1: Page number 31\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "\n", + "from math import exp\n", + "from math import pi\n", + "\n", + "l=5.0; #length of tungsten filament in cm\n", + "d=0.01; #diameter of the filament in cm\n", + "T=2500.0; #operating temperature in K\n", + "A=60.2*pow(10,4); #constant, depending upon the type of thermionic emitter, in amp/m\u00b2/K\u00b2\n", + "phi=4.517; #work function of emitter in eV\n", + "\n", + "\n", + "#Calculation\n", + "b=round(11600*phi,-1); #constant for a metal, in K\n", + "Js=round(A*T*T*exp(-b/T),-2); #Emission current density in amp/m\u00b2\n", + "a=pi*(d/100)*(l/100); #Surface area of the cathode in m\u00b2\n", + "E_I=Js*a; #Emission current in A\n", + "\n", + "#Result\n", + "print(\"emission current =%.3f A\"%E_I);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "emission current =0.047 A\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 2.2:Page number 31\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log\n", + "\n", + "#Variable declaration\n", + "Js=0.1; #Emission current density in amp/cm\u00b2\n", + "A=60.2; #Constant depending upon the type of thermionic emitter, in amp/cm\u00b2/K\u00b2\n", + "T=1900.0; #Absolute temperature in K\n", + "\n", + "\n", + "#calculations\n", + "#Calculating b according to the formula Js=A*T\u00b2*exp(-b/T) for emission current density\n", + "b=-T*(log(Js/(A*T*T))); #constant for emitter, in K\n", + "phi= round(b/11600,2); # work function in eV\n", + "\n", + "print (\"Work function of the tungsten wire = %.2f eV\"%phi);\n", + "\n", + "if(phi==4.52):\n", + "\tprint(\"Given sample is pure Tungsten\");\n", + "elif(phi!=4.52 and phi>=2.63 and phi<=4.52):\n", + "\tprint (\"The sample is not pure Tungsten\");\n", + " \n", + "#Note : In the text book, the work function has been approximated to 3.56eV, but in the code it calculates as 3.52eV\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Work function of the tungsten wire = 3.52 eV\n", + "The sample is not pure Tungsten\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter6_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter6_1.ipynb new file mode 100644 index 00000000..a6008ee1 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter6_1.ipynb @@ -0,0 +1,1624 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:3452607f2168b562d941493f83083042eaa5a2d316715f9d9f089ff03d73fdb8" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 6: SEMICONDUCTOR DIODE" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.2, Page number 81" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration \n", + "Vf =20; #Peak Input Voltage in V\n", + "rf=10; #Forward Resistance in ohms\n", + "RL=500.0; #Load Resistance in ohms\n", + "V0=0.7; #Potential Barrier Voltage of the diodes in V\n", + "\n", + "#Calculation\n", + "#(1)\n", + "If_peak=(Vf-V0)/(rf+RL); #Peak current through the diode in A\n", + "If_peak=If_peak*1000; #Peak current through the diode in mA\n", + "#(2)\n", + "V_out_peak =If_peak * RL/1000 ; #Peak output voltage in V\n", + "\n", + "#For an Ideal diode\n", + "If_peak_ideal=Vf/RL; #Peak current through the ideal diode in A\n", + "If_peak_ideal=If_peak_ideal*1000; #Peak current through the ideal diode in mA\n", + "\n", + "V_out_peak_ideal=If_peak_ideal * RL/1000; # Peak output voltage in case of the ideal diode in V\n", + "\n", + "#Result\n", + "print '(i) Peak current through the diode = %.1f mA '%If_peak;\n", + "print '(ii) Peak output voltage = %.1f V'%V_out_peak;\n", + "print '(iii) Peak current through the ideal diode = %d mA '%If_peak_ideal;\n", + "print '(iv) Peak output voltage in case of the ideal diode = %d V'%V_out_peak_ideal;\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Peak current through the diode = 37.8 mA \n", + "(ii) Peak output voltage = 18.9 V\n", + "(iii) Peak current through the ideal diode = 40 mA \n", + "(iv) Peak output voltage in case of the ideal diode = 20 V\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.3, Page number 82" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "V =10.0; #Battery voltage in V\n", + "R1=50.0; #Resistor 1's resistance in ohms\n", + "R2=5.0; #Resistor 2's resistance in ohms\n", + "\n", + "#Calculation\n", + "#Using Thevenin's Theorem to find current in the diode\n", + "E0=(R2/(R1+R2))*V; #Thevenin's Voltage in V\n", + "R0=(R1*R2)/(R1+R2); #Thevenin's Resistance in ohms\n", + "\n", + "I0=E0/R0; #Current through the diode in A\n", + "I0=I0*1000; #Current through the diode in mA\n", + "\n", + "#Result\n", + "print 'Current through the diode = %d mA '%Io;\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current through the diode = 200 mA \n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.4, Page number 82-83 " + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "V =10.0; #Battery voltage in V\n", + "R0=48.0; #Resistance of the resistor in ohms\n", + "Rd=1.0; #Forward resistance of the diodes in ohms\n", + "Vd=0.7; #Potential barrier of the diodes in V\n", + "#Calculation\n", + "V_net=V-Vd-Vd; #Net voltage in the circuit in V\n", + "R_net=R0+Rd+Rd #Net resistance of the circuit in ohms\n", + "I_net=V_net/R_net; #Net current in the circuit in A\n", + "I_net=I_net*1000; #Net current in mA\n", + "\n", + "#Result\n", + "print 'Net current in the circuit = %d mA '%I_net;\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Net current in the circuit = 172 mA \n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.5, Page number 83" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "E1=24; #Voltage of first source in V\n", + "E2=4; #Voltage of second source in V\n", + "V0=0.7; #Potential barrier of diodes in V\n", + "R=2000; #Resistance of the given resistor in ohms\n", + "Rd=0; #Forward resistance of the diodes in ohms\n", + "\n", + "#Calculation\n", + "I=(E1-E2-V0)/(R+Rd); #Current in the circuit in A\n", + "I=I*1000; #Current in the circuit in mA \n", + "\n", + "#Result\n", + "print 'Current in the circuit = %.2f mA '%I;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current in the circuit = 9.65 mA \n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.6, Page number 83-84" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "V=20; #Voltage of source in V\n", + "V0=0.3; #Potential barrier of Germanium diode in V\n", + "V0_Si=0.7; #Potetial barrier of Silicon diode in V \n", + "\n", + "#Calculation\n", + "#As only Ge diode is turned on due to less potential barrier,\n", + "VA=V-V0; #Voltage VA acroos resistor of 3k ohms\n", + "\n", + "#Result\n", + "print 'Voltage VA = %.1f mA '%VA;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage VA = 19.7 mA \n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.7, Page number 84" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "V=10; #Voltage of source in V\n", + "V0=0.7; #Potetial barrier of Silicon diode in V \n", + "# Resistance of all resistors in ohms\n", + "R1=2000;\n", + "R2=2000;\n", + "R3=2000;\n", + "\n", + "#Calculation\n", + "Id=(V-V0)/(R2+2*R3); #Current through the diodes in A\n", + "VQ=2*Id*R3; #Voltage VQ across the grounded 2k ohm resistor in V\n", + "Id=Id*1000; #Current through the diodes in mA\n", + "\n", + "#Result\n", + "print 'Voltage VQ = %.1f V '%VQ;\n", + "print 'Current through the diodes, Id = %.2f mA '%Id;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage VQ = 6.2 V \n", + "Current through the diodes, Id = 1.55 mA \n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.8, Page number 84" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "V=15; #Voltage of source in V\n", + "V0=0.7; #Potetial barrier of Silicon diode in V \n", + "R=500 # Resistance of all resistors in ohms\n", + "\n", + "#Calculation\n", + "I1=(V-V0)/R; #total current in the circuit in A\n", + "Id1=I1/2; #current in first diode in A\n", + "Id1=Id1*1000; #current in first diode in mA\n", + "Id2=Id1 #current in second diode in mA\n", + "\n", + "#Result\n", + "print ('Current in first diode = %.1f mA'%Id1);\n", + "print ('Current in second diode = %.1f mA'%Id2);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current in first diode = 14.3 mA\n", + "Current in second diode = 14.3 mA\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.9, Page number 85" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "E=20; #Voltage of source in V\n", + "V0_d1=0.7; #Potetial barrier of first Silicon diode in V\n", + "V0_d2=0.7; #Potetial barrier of second Silicon diode in V\n", + "R1=5600; # Resistance of first resistor in ohms\n", + "R2=3300; # Resistance of second resistor in ohms\n", + "\n", + "#Calculation\n", + "I2=V0_d2/R2; #Current I2 through resistor R2 in A\n", + "I2=round((I2*1000),3); #Current I2 through resistor R2 in mA\n", + "I1=(E-V0_d1-V0_d2)/R1; #Current I1 through resistor R1 in A\n", + "I1=round((I1*1000),2); #Current I1 through resistor R1 in mA\n", + "I3=I1-I2; #Current I3 through diode D2 in mA\n", + "\n", + "#Result\n", + "print 'Current I1= %.2f mA'%I1;\n", + "print 'Current I1= %.3f mA'%I2;\n", + "print 'Current I1= %.3f mA'%I3;\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current I1= 3.32 mA\n", + "Current I1= 0.212 mA\n", + "Current I1= 3.108 mA\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.10, Page number 85-86" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable Declaration\n", + "E=10.0; #Voltage of source in V\n", + "V0=0.7; #Potetial barrier of Silicon diode in V\n", + "R1=2000; # Resistance of first resistor in ohms\n", + "R2=8000; # Resistance of second resistor in ohms\n", + "R3=4000; #Resistance of third resistor in ohms\n", + "R4=6000; #Resistance of fourth resistor in ohms\n", + "\n", + "#Calculation\n", + "#Assuming the given diode to be reverse bised and calculating voltage across it's terminals\n", + "V1=(E/(R1+R2))*R2; #voltage at the P side of the diode, i.e, voltage across R2 resistor,according to voltage divider rule, in V\n", + "V2=(E/(R3+R4))*R4; #voltage at the N side of the diode, i.e, voltage across R4 resistor,according to voltage divider rule, in V\n", + "\n", + "#Result\n", + "if((V1-V2)>=V0):\n", + " print 'Our assumption was wrong and, the diode is forward biased';\n", + "else:\n", + " print 'The diode is reverse biased';\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Our assumption was wrong and, the diode is forward biased\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.11, Page number 86" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V=2; #Supply voltage in V\n", + "V0=0.7; #Potential barrier voltage of the diode in V \n", + "R1=4000.0; #Resistance of first resistor in \u03a9\n", + "R2=1000.0; ##Resistance of second resistor in \u03a9\n", + "\n", + "#Calculation\n", + "#Assuming the diode to be in ON state\n", + "I1=((V-V0)/R1)*1000; #Current through resistor R1, in mA\n", + "I2=(V0/R2)*1000; #Current through resistor R2, in mA\n", + "ID=I1-I2; #Diode current, in mA\n", + "\n", + "if(ID<0):\n", + " #Since the diode current is negative, the diode must be OFF \n", + " ID=0; #True value of diode current, mA\n", + " \n", + "#As the diode is in OFF state it can be replaced by an open ciruit equivalent \n", + "VD=V*R2/(R1 +R2); #Voltage across the diode, in V\n", + "\n", + "#Result\n", + "print 'ID =%d mA'%ID;\n", + "print 'VD =%.1f V'%VD;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "ID =0 mA\n", + "VD =0.4 V\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.12, Page number 89-90" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "AC_Input_Power=100.0; #Input AC Power in watts\n", + "AC_Output_Power=40.0; #Output AC Power in watts\n", + "Accepted_Power=50.0; #Power accepted by the half-wave rectifier in watt\n", + "\n", + "#Calculation\n", + "R_eff=(AC_Output_Power/AC_Input_Power)*100; #Rectification efficiency of the half-wave rectifier\n", + "Unused_power=AC_Input_Power-Accepted_Power; #Power not used by the half_wave rectifier due to open circuited condition of the diode in watt\n", + "Power_dissipated=Accepted_Power-AC_Output_Power; #Power dissipated by the diode watt\n", + "\n", + "#Result\n", + "print 'The rectification efficiency of the half-wave rectifier= %d%% '%R_eff;\n", + "\n", + "print 'Rest 60%% of the power is the unused power and power dissipated by the diode = %d watts and %d watts' %(Unused_power ,Power_dissipated);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The rectification efficiency of the half-wave rectifier= 40% \n", + "Rest 60% of the power is the unused power and power dissipated by the diode = 50 watts and 10 watts\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.13, Page number 90" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import sqrt\n", + "#Variable declaration\n", + "Vrms=230.0; #AC supply RMS voltage in V\n", + "Turns_Ratio=10/1; #turn ratio of the transformer \n", + "\n", + "#Calculation\n", + "Vpm=sqrt(2)*Vrms; #Maximum primary voltage in V\n", + "Vsm=Vpm/Turns_Ratio; #Maximum secondary voltage in V\n", + "#Case 1\n", + "Vdc=Vsm/(round(pi,2)); #Output D.C voltage, which is the average voltage in V\n", + "Vdc=round(Vdc,2);\n", + "#Case 2\n", + "PIV=Vsm; #Peak Inverse Voltage in V\n", + "\n", + "#Result\n", + "print 'The output d.c voltage= %.2f V'%Vdc;\n", + "print 'The peak inverse voltage= %.2f V'%PIV;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output d.c voltage= 10.36 V\n", + "The peak inverse voltage= 32.53 V\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.14, Page number 90-91" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "#Variable declaration\n", + "rf=20.0; #Internal resistance of the crystal diode in ohms\n", + "Vm=50.0; #Maximum applied voltage in V\n", + "RL=800.0; #Load Resistance in ohms\n", + "\n", + "#Calculation\n", + "# 1\n", + "Im=Vm/(rf+RL); #Maximum current in A\n", + "Im=Im*1000; #Maximum current in \n", + "Im=round(Im,0);\n", + "Idc=Im/pi; #Average voltage in mA\n", + "Idc=round(Idc,1);\n", + "Irms=Im/2; #RMS value of the current in mA\n", + "Irms=round(Irms,1)\n", + "\n", + "# 2\n", + "AC_Input_Power=pow(Irms/1000,2)*(rf+RL); #Input a.c power in watt\n", + "\n", + "DC_Output_Power=pow(Idc/1000,2)*RL; #Output d.c power in watt\n", + "\n", + "# 3\n", + "DC_Output_Voltage=(Idc/1000)*RL; #Output d.c voltage in V\n", + "\n", + "# 4\n", + "Rectifier_efficiency=(DC_Output_Power/AC_Input_Power)*100; # Efficiency of rectification of the half-wave rectifier\n", + "\n", + "#Result\n", + "print ' i:';\n", + "print ' Im = %d mA'%Im;\n", + "print ' Idc = %.1f mA'%Idc;\n", + "print ' Irms = %.1f mA'%Irms;\n", + "print ' ii: ';\n", + "print ' a.c input power= %.3f watt'%AC_Input_Power;\n", + "print ' d.c output power= %.3f watt'%DC_Output_Power;\n", + "print ' iii: ';\n", + "print ' d.c output voltage = %.2f volts'%DC_Output_Voltage;\n", + "print ' iv: '\n", + "print ' Efficiency of rectification = %.1f%%'%Rectifier_efficiency;\n", + "\n", + " " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " i:\n", + " Im = 61 mA\n", + " Idc = 19.4 mA\n", + " Irms = 30.5 mA\n", + " ii: \n", + " a.c input power= 0.763 watt\n", + " d.c output power= 0.301 watt\n", + " iii: \n", + " d.c output voltage = 15.52 volts\n", + " iv: \n", + " Efficiency of rectification = 39.5%\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.15, Page number 91" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "#Variable declaration\n", + "Vdc=50.0; #Output d.c voltage in V\n", + "rf=25; #Diode resistance in ohm\n", + "RL=800; #Load resistance in ohm\n", + "\n", + "\n", + "#Calculation\n", + "Vm=(pi*(rf+RL)*Vdc)/RL; #[ Vdc=Vm*RL/(pi*(rf+RL)) ]Maximum value of a.c voltage required to get a volatge of Vdc from the half-wave rectifier, in V\n", + "Vm=round(Vm,0); \n", + "#Result\n", + "print 'The a.c voltage required should have maximum value of = %d V' %Vm;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The a.c voltage required should have maximum value of = 162 V\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.16, Page number 95" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt \n", + "from math import pi\n", + "#Variable declaration\n", + "rf=20; #Internal resistance of the diodes in ohm\n", + "Vrms=50; #RMS value of transformer's secondary voltage from centre tap to each end of secondary\n", + "RL=980; #Load resistance in ohm\n", + "\n", + "#Calculation\n", + "Vm=Vrms*sqrt(2); #Maximum a.c voltage in V\n", + "Im=Vm/(rf+RL); #Maximum load current in A\n", + "Im=Im*1000; #Maximum load current in mA\n", + " \n", + "# 1:\n", + "Idc=2*Im/pi; #Mean load current\n", + "\n", + "# 2:\n", + "Irms=Im/sqrt(2); #RMS value of load current in A\n", + "\n", + "#Result\n", + "print 'i:';\n", + "print' The mean load current= %d mA'%Idc;\n", + "print 'ii:';\n", + "print ' The r.m.s value of the load current = %d mA'%Irms; " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i:\n", + " The mean load current= 45 mA\n", + "ii:\n", + " The r.m.s value of the load current = 50 mA\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.17, Page number 95-96" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt \n", + "#Variable declaration\n", + "RL=100; #Load resistance in ohm \n", + "rf=0; #Internal resistance of the diodes in ohm\n", + "Turns_ratio=5/1; #Primary to secondary turns ratio of transformer \n", + "P_Vrms=230; #R.M.S value of voltage in primary winding in V\n", + "S_Vrms=P_Vrms/Turns_ratio; #R.M.S value of voltage in secondary winding in V\n", + "S_Vm=S_Vrms*sqrt(2); #Maximum voltage across secondary winding in V\n", + "Vm=S_Vm/2; #Maximum voltage across half seconfdary winding in V\n", + "\n", + "\n", + "#Calculation\n", + "# 1:\n", + "Idc=2*Vm/(pi*RL); #Average current in A\n", + "Vdc=Idc*RL; #d.c output voltage in V\n", + "\n", + "# 2:\n", + "PIV=S_Vm; #Peak Invers Voltage(= Maximum secondary voltage) in V\n", + "\n", + "# 3:\n", + "Pac=pow(Vm/(RL*sqrt(2)),2)*(rf+RL); #a.c input power in watt\n", + "Pdc=(pow(Idc,2)*RL); #d.c output power in watt\n", + "R_eff=(Pdc/Pac)*100; #Rectification efficiency\n", + "R_eff=round(R_eff,1);\n", + "\n", + "#Result\n", + "print 'i:';\n", + "print ' The d.c output voltage= %.1f V'%Vdc;\n", + "print 'ii:';\n", + "print ' The peak inverse voltage= %d V'%PIV;\n", + "print 'iii:';\n", + "print ' Rectification efficiency= %.1f%%'%R_eff;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i:\n", + " The d.c output voltage= 20.7 V\n", + "ii:\n", + " The peak inverse voltage= 65 V\n", + "iii:\n", + " Rectification efficiency= 81.1%\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "NOTE: The value of rectification efficiency is calculated as 81.2% in the textbook using the formula 0.812/(1 + (rf/RL)), but by calculating using the correct values in the formula we get 81.1%." + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.18, Page number 96-97" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt \n", + "#Variable declaration\n", + "fin=50; #frequency of input ac source in Hz\n", + "RL=200; #Load resistance in ohm\n", + "Turns_ratio=4/1; #Transformers turns ratio, primary to secondary.\n", + "P_Vrms=230.0; #R.M.S value of voltage in primary winding in V\n", + "S_Vrms=P_Vrms/Turns_ratio #R.M.S value of voltage in secondary winding in V\n", + "Vm=S_Vrms*sqrt(2); #Maximum voltage across secondary winding in V\n", + "\n", + "#Calculation\n", + "# 1:\n", + "Idc=2*Vm/(pi*RL); # Average current in A\n", + "Vdc=Idc*RL; #Output d.c voltage in V\n", + "Vdc=round(Vdc,0);\n", + "# 2:\n", + "PIV= Vm; #Peak Inverse Voltage(= Maximum volutage across secondary winding) in V\n", + "\n", + "# 3:\n", + "fout=2*fin; #Output frequency in Hz\n", + "\n", + "#Result\n", + "print 'i:';\n", + "print ' The d.c output voltage = %d V' %Vdc;\n", + "print 'ii:';\n", + "print ' The peak inverse voltage = %.1f V'%PIV;\n", + "print 'iii:';\n", + "print ' The output frequency = %d Hz'%fout;\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i:\n", + " The d.c output voltage = 52 V\n", + "ii:\n", + " The peak inverse voltage = 81.3 V\n", + "iii:\n", + " The output frequency = 100 Hz\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.19, Page number 97" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "RL=100.0; #Load Resistance in ohm\n", + "Turns_ratio=5/1; #Primary to secondary turns ratio of the transformer\n", + "Vin=230.0; #R.M.S value of input voltage in V\n", + "fin=50; #Input frequency in Hz\n", + "\n", + "#Calculation\n", + "Vs_rms=Vin/Turns_ratio; #R.M.S value of the voltage in secondary winding, in v\n", + "Vs_max=Vs_rms*sqrt(2); #Maximum voltage across secondary, in V\n", + "\n", + "# (i)\n", + "#Case i: Centre-tap circuit\n", + "Vm=Vs_max/2; #Maximum voltage across half secondary winding, in V \n", + "Vdc=2*Vm*RL/(pi*RL); #DC output voltage, in V \n", + "print 'The d.c output voltage for the centre-tap circuit = %.1f V'%Vdc;\n", + "\n", + "#Case ii:\n", + "Vm=Vs_max; #Maximum voltage across secondary, in V\n", + "Vdc=2*Vm*RL/(pi*RL); #DC output voltage, in V \n", + "print 'The d.c output voltage for the bridge circuit = %.1f V'%Vdc; \n", + "\n", + "# ii:\n", + "#Case i: Centre-tap circuit\n", + "Turns_ratio=5/1; #Turns ratio of the transformer\n", + "Vs_rms=Vin/Turns_ratio; #R.M.S value of the secondary voltage in V\n", + "Vs_max=Vs_rms*sqrt(2); #Maximum voltage across the secondary in V\n", + "Vm=Vs_max/2; #Maximum voltage across half of the secondary in V\n", + "PIV=2*Vm; #Peak Inverse Voltage in V\n", + "print 'PIV in case of centre-tap circuit = %d V'%PIV;\n", + "\n", + "#Case ii: Bridge circuit\n", + "Turns_ratio=10/1; #Turns ratio of the transformer\n", + "Vs_rms=Vin/Turns_ratio; #R.M.S value of the secondary voltage in V\n", + "Vs_max=Vs_rms*sqrt(2); #Maximum voltage across the secondary in V\n", + "PIV=Vm; #Peak Inverse Voltage in V\n", + "print 'PIV in case of bridge circuit = %.1f V'%PIV;\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The d.c output voltage for the centre-tap circuit = 20.7 V\n", + "The d.c output voltage for the bridge circuit = 41.4 V\n", + "PIV in case of centre-tap circuit = 65 V\n", + "PIV in case of bridge circuit = 32.5 V\n" + ] + } + ], + "prompt_number": 46 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.20, Page number 98" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import sqrt\n", + "#Variable declaration\n", + "rf=1; #forward resistance of diodes of the rectifier in ohm\n", + "RL=480; #Load resistance in ohm\n", + "Vrms=240.0; #a.c supply voltage in V\n", + "Vm=Vrms*sqrt(2); #Maximum a.c voltage in V \n", + "\n", + "#Calculation\n", + "# 1:\n", + "Rt=2*rf+RL; #Total circuit resistance at any instance in ohm\n", + "Im=Vm/Rt; #Maximum load current in A\n", + "Idc=2*Im/pi; #Mean load current in A\n", + "\n", + "# 2:\n", + "Irms=Im/2; #R.M.S value of current in A\n", + "P=pow(Irms,2)*rf; #Power dissipated in each diode in watt\n", + "\n", + "\n", + "#Result\n", + "print 'i:';\n", + "print ' Mean load current = %.2f A'%Idc;\n", + "print 'ii:';\n", + "print ' Power dissipated in each diode= %.3f W'%P;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i:\n", + " Mean load current = 0.45 A\n", + "ii:\n", + " Power dissipated in each diode= 0.124 W\n" + ] + } + ], + "prompt_number": 39 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "NOTE: The value of power dissipated is approximately 0.124 W , but in the textbook it is approximated as 0.123W." + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.21, Page number 98-99" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt,pi\n", + "#Variable declaration\n", + "RL=12000; #Load resistance in ohm\n", + "V0=0.7; #Potential barrier voltage of diodes in V\n", + "Vrms=12; #R.M.S value of input a.c voltage in V\n", + "Vs_pk=Vrms*sqrt(2); #Peak secondary voltage in V\n", + "\n", + "#Calculation\n", + "# 1:\n", + "Vout_pk=Vs_pk-(2*V0); #Peak output voltage in V\n", + "Vav=2*Vout_pk/pi; #Average output voltage in V\n", + "Vav=round(Vav,2);\n", + "\n", + "# 2:\n", + "Iav=Vav/RL; #Average output current in A\n", + "Iav=Iav*pow(10,6); #Average output current in \u03bcA\n", + "\n", + "\n", + "#Result\n", + "print 'i:';\n", + "print ' Average output voltage=%.2f V'%Vav;\n", + "print 'ii:';\n", + "print ' Average output current=%.1f \u03bcA'%Iav;\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i:\n", + " Average output voltage=9.91 V\n", + "ii:\n", + " Average output current=825.8 \u03bcA\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.22, Page number 102" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vdc_A=10; #Supply voltage of A in V\n", + "Vdc_B=25; #Supply voltage of B in V\n", + "Vac_rms_a=0.5; #Ripples in power supply A in V\n", + "Vac_rms_b=0.001; #Ripples in power supply B in V\n", + "\n", + "#Calculation\n", + "#For power supply A\n", + "ripple_factor_A=Vac_rms_a/Vdc_A; #Ripple factor of power supply A\n", + "\n", + "#For power supply B\n", + "ripple_factor_B=Vac_rms_b/Vdc_B; #Ripple factor of power supply B\n", + "\n", + "#Result\n", + "if(ripple_factor_A<ripple_factor_B):\n", + " print 'Power supply A is better';\n", + "else :\n", + " print 'Power supply B is better';" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power supply B is better\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.23, Page number 105-106" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "#Variable declaration\n", + "RL=2200; #Load resistance in ohm\n", + "C=50*pow(10,-6); #Capacitance of the capacitor used in filter circuit in F\n", + "V0=0.7; #Potential barrier voltage of the diodes of the rectifier in V\n", + "Vrms=115.0; #R.M.S value of input a.c voltage in V \n", + "fin=60; #Frequency of input a.c voltage in Hz\n", + "Turns_ratio=10/1; #Primary to secondary, turns ratio of the transformer \n", + "\n", + "#Calculation\n", + "Vp_prim=Vrms*sqrt(2); #Peak primary voltage in V\n", + "Vp_sec=Vp_prim/Turns_ratio; #Peak secondary voltage in V\n", + "Vp_in= Vp_sec - 2*V0; #Peak full wave rectified voltage at the filter input in V\n", + "f=2*fin; #Output frequency in Hz\n", + "Vdc=Vp_in*(1-(1/(2*f*RL*C))); #Output d.c voltage in V\n", + "\n", + "#Result\n", + "print 'The output d.c voltage is = %.1f V'%Vdc;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output d.c voltage is = 14.3 V\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.24, Page number 106" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "#Variable declaration\n", + "R=25; #d.c resistance of the choke in ohm\n", + "RL=750; #Load resistance in ohm\n", + "Vm=25.7; #Maximum value of the pulsating output from the rectifier in V\n", + "\n", + "#Calculation\n", + "V_dc=2*Vm/pi; #d.c component of the pulsating output in V\n", + "V_dc=round(V_dc,1);\n", + "V_dc_out=(V_dc*RL)/(R+RL); #Output d.c voltage in V\n", + "V_dc_out=round(V_dc_out,1);\n", + "\n", + "#Result\n", + "print ' The output d.c voltage accross the load resistance is = %.1f V'%V_dc_out;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " The output d.c voltage accross the load resistance is = 15.9 V\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.25, Page number 113-114" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ei=120.0; #Input Voltage in V\n", + "Vz=50.0; #Zener Voltage in V\n", + "R=5000.0; #Resistance of the series resistor in ohm\n", + "RL=10000.0; #Load resistance in ohm\n", + "\n", + "#Calculation\n", + "V=Ei*RL/(R+RL); #Voltage across the open circuit if the zener diode is removed\n", + "if(V>Vz):\n", + " #Zener diode is in ON state\n", + " # i:\n", + " Output_voltage=Vz; #Voltage across load resistance, in V\n", + " #ii:\n", + " Voltage_R=Ei-Vz; #Voltage across the series resistance R, in V\n", + " #iii:\n", + " IL=Vz/RL; #Load current through RL in A\n", + " IL=IL*1000; #Load current through RL in mA\n", + " I=Voltage_R/R; #Current through the series resistance in A\n", + " I=I*1000; #Current through the series resistance in mA\n", + " Iz=I-IL; #Applying Kirchhoff's first law, Zener current in mA\n", + " \n", + " #Result\n", + " print 'i) The output voltage across the load resistance RL = %d V'%Output_voltage;\n", + " print 'ii) The voltage drop across the series resistance R = %d V'%Voltage_R;\n", + " print 'iii) The current through the zener diode = %d mA'%Iz;\n", + " " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i) The output voltage across the load resistance RL = 50 V\n", + "ii) The voltage drop across the series resistance R = 70 V\n", + "iii) The current through the zener diode = 9 mA\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.26, Page number 114-115" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Max_V=120.0; #Maximum input voltage in V\n", + "Min_V=80.0; #Minimum input voltage in V\n", + "R=5000.0; #Series resistance in ohm\n", + "RL=10000.0; #Load resistance in ohm\n", + "Vz=50.0; #Zener voltage in V\n", + "\n", + "\n", + "#Calculation\n", + "#Case i: Maximum zener current\n", + "#Zener current will be maximum when the input voltage is maximum\n", + "V_R_max=Max_V-Vz; #Voltage across series resistance R, in V\n", + "I_max=V_R_max/R; #Current through series resistance R, in A\n", + "I_max=I_max*1000; #Current through series resistance R, in mA\n", + "IL_max=Vz/RL; #Load current in A\n", + "IL_max=IL_max*1000; #Load current in mA\n", + "Iz_max=I_max-IL_max; #Applying Kirchhoff's first law, Zener current in mA;\n", + "\n", + "#Case ii: Minimum zener current\n", + "#The zener will conduct minimum current when the input voltage is minimum\n", + "V_R_min=Min_V-Vz; #Voltage across series resistance R, in V\n", + "I_min=V_R_min/R; #Current through series resistance R, in A\n", + "I_min=I_min*1000; #Current through series resistance R, in mA\n", + "IL_min=Vz/RL; #Load current in A\n", + "IL_min=IL_min*1000; #Load current in mA\n", + "Iz_min=I_min-IL_min; #Applying Kirchhoff's first law, Zener current in mA\n", + "\n", + "#Result\n", + "print 'Case i: ';\n", + "print 'Maximum zener current = %d mA'%Iz_max;\n", + "print 'Case ii: ';\n", + "print 'Minimum zener current = %d mA'%Iz_min;\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Case i: \n", + "Maximum zener current = 9 mA\n", + "Case ii: \n", + "Minimum zener current = 1 mA\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.27, Page number 115" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ei=12; #Input voltage in V\n", + "Vz=7.2; #Zener voltage in V\n", + "E0=Vz; #Voltage to be maintained across the load in V\n", + "IL_max=0.1; #Maximum load current in A\n", + "IL_min=0.012; #Minimum load current in A\n", + "Iz_min=0.01; #Minimum zener current in A\n", + "\n", + "#Calculation\n", + "#When the load current is maximum at minimum value of RL, the zener current is minimum and, as the load current decreases due to increase in value of RL\n", + "R=(Ei-E0)/(Iz_min+IL_max); #The value of series resistance R to maintain a voltage=E0 across load, in ohm\n", + "\n", + "#Result\n", + "print 'The minimum value of series resistance R to maintain a constant value of 7.2 V is = %.1f \u03a9'%R;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The minimum value of series resistance R to maintain a constant value of 7.2 V is = 43.6 \u03a9\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "NOTE: The actual value of R is 43.636363 (recurring) but, in the textbook the value of R is wrongly approximated 43.5 \u03a9" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.28, Page number 115" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ei_min=22; #Minimum input voltage in V\n", + "Ei_max=28; #Maximum input voltage in V\n", + "Vz=18; #Zener voltage in V\n", + "E0=Vz; #Constant voltage maintained across the load resistance in V\n", + "Iz_min=0.2; #Minimum zener current in A\n", + "Iz_max=2; #Maximum zener current in A\n", + "RL=18; #Load resistance in \u03a9\n", + "\n", + "#Calculation\n", + "IL=Vz/RL; #Constant value of load current in A\n", + "#When the input voltage is minimum, the zener current will be minimum\n", + "R=(Ei_min-E0)/(Iz_min+IL) #The value of series resistance so that the voltage E0 across RL remains constant\n", + "\n", + "print 'The value of series resistance R, to maintain constant voltage E0 across RL = %.2f \u03a9.'%R;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The value of series resistance R, to maintain constant voltage E0 across RL = 3.33 \u03a9.\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.29, Page number 116 " + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=10 #Zener voltage in V\n", + "Ei_min=13; #Minimum input voltage in V\n", + "Ei_max=16; #Maximum input voltage in V\n", + "Iz_min=0.015; #Minimum zener current in A\n", + "IL_min=0.01; #Minimum load current in A \n", + "IL_max=0.085; #Maximum load curremt in A\n", + "E0=Vz; #Constant voltage to be maintained in V \n", + "\n", + "#Calculation\n", + "#The zener current will be minimum when the input voltage will be minimum and at that time the load current will be maximum\n", + "R=(Ei_min-E0)/(Iz_min+IL_max); #The value of series resistance R to maintain a constant voltage across load\n", + "\n", + "\n", + "#Result\n", + "print 'The value of series resistance to maintain a constant voltage across the load resistance is = %d \u03a9'%R;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The value of series resistance to maintain a constant voltage across the load resistance is = 30 \u03a9\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.30, Page number 116" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Iz=0.2; #Current rating of each zener in A\n", + "Vz=15; #Voltage rating of each zener in V\n", + "Ei=45; #Input voltage in V\n", + "\n", + "#Calculation\n", + "# i: Regulated output voltage across the two zener diodes \n", + "E0=2*Vz; # V\n", + "\n", + "# ii: Value of series resistance \n", + "R=(Ei-E0)/Iz; # \u03a9\n", + "\n", + "#Result\n", + "print 'i) The regulated output voltage = %d V'%E0;\n", + "print 'ii) The value of the series resistance = %d \u03a9'%R;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "i) The regulated output voltage = 30 V\n", + "ii) The value of the series resistance = 75 \u03a9\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.31, Page number 116-117" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Vz=10; #Voltage rating of each zener in V\n", + "Iz=1; #Current rating of each zener in A\n", + "Ei=45; #Input unregulated voltage in V\n", + "\n", + "#Calculation\n", + "#Regulated output voltage across the three zener diodes\n", + "E0=3*Vz; # V\n", + "\n", + "#Value of series resistance to obtain a 30V regulated output voltage\n", + "R=(Ei-E0)/Iz; # \u03a9\n", + "\n", + "#Result\n", + "print 'Value of series resistance to obtain a 30V regulated output voltage = %d \u03a9'%R;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of series resistance to obtain a 30V regulated output voltage = 15 \u03a9\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.32, Page number 117" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "RL=2000.0; #Load resistance in \u03a9\n", + "R=200.0; #Series resistance in \u03a9\n", + "Iz=0.025; #Zener current rating in A\n", + "E0=30.0; #Output regulated voltage in V \n", + "\n", + "#Calculation\n", + "#Minimum input voltage will be required when Iz=0 A, and at this condition\n", + "IL=E0/RL; #Load current during Iz=0, in A\n", + "I=IL; #According to Kirchhoff's law, total current, in A\n", + "Ei_min=E0+(I*R); #Minimum input voltage in V\n", + "\n", + "#The maximum input voltage required will be when Iz=0.025 A, and at that condition \n", + "I=IL+Iz; #According to Kirchhoff's law, total current, in A\n", + "Ei_max=E0+(I*R); #maximum input voltage in V\n", + "\n", + "\n", + "#Result\n", + "print 'The required range of input voltage is from %d V to %d V'%(Ei_min,Ei_max); \n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The required range of input voltage is from 33 V to 38 V\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.33, Page number 117-118" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ei=16; #Unregulated input voltage in V\n", + "E0=12; #Output regulated voltage in V\n", + "IL_min=0; #Minimum load current in A\n", + "IL_max=0.2; #Maximum load current in A\n", + "Iz_min=0; #Minimum zener current in A\n", + "Iz_max=0.2; #Maximum zener current in A\n", + "\n", + "#Calculation\n", + "#As the regulated voltage required across the load is 12V\n", + "Vz=E0; #Voltage rating of zener diode in V\n", + "V_R=Ei-E0; #Constant Voltage that should remain across series resistance \n", + "#The minimum zener current will occur when the curent in the load in maximum\n", + "R=V_R/(Iz_min+IL_max); #Series resistance in \u03a9\n", + "\n", + "Max_power_rating=Vz*Iz_max; #Maximum power rating of zener diode in W\n", + "\n", + "#Result\n", + "print 'The regulator is designed using a Seris resistance of %d \u03a9 and a zener diode of zener voltage %d V'%(R,Vz);\n", + "print 'The maximum power rating of the zener diode is = %.1f W '%Max_power_rating;" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The regulator is designed using a Seris resistance of 20 \u03a9 and a zener diode of zener voltage 12 V\n", + "The maximum power rating of the zener diode is = 2.4 W \n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 6.34, Page number 118" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V=12; #Source voltage in V\n", + "R=1000; #Series resistance in \u03a9\n", + "RL=5000; #Load resistance in \u03a9\n", + "Vz=6; #Voltage rating of zener in V\n", + "\n", + "#Calculation\n", + "#Case i: zener is working properly\n", + "#The output voltage across the load will be equal to the zener voltage.\n", + "V0=Vz; # V\n", + "\n", + "#Result\n", + "print 'Case i: Output voltage when zener is working properly is %d V'%V0;\n", + "\n", + "#Case ii: zener is shorted\n", + "#As the zener is shorted, the potential difference across the load will be zero\n", + "V0=0; #V\n", + "\n", + "#Result\n", + "print 'Case ii: Output voltage when zener is short circuited is %d V'%V0;\n", + " \n", + "#Case iii: zener is open circuited\n", + "#If the zener is open circuited, the total voltage will drop across R and RL according to the voltage divider rule\n", + "V0=V*RL/(R+RL); #V\n", + "\n", + "#Result\n", + "print 'Case iii: Output voltage when zener is open circuited is %d V'%V0;\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Case i: Output voltage when zener is working properly is 6 V\n", + "Case ii: Output voltage when zener is short circuited is 0 V\n", + "Case iii: Output voltage when zener is open circuited is 10 V\n" + ] + } + ], + "prompt_number": 4 + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter7_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter7_1.ipynb new file mode 100644 index 00000000..537a179e --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter7_1.ipynb @@ -0,0 +1,212 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:e210474f5c4fc6668f4c7b5af2adf833a1c7f62577017a980ab8d11cd8ce2886" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 7 : SPECIAL-PURPOSE DIODES" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 7.1 : Page number 127-128\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_S=10.0; #Supply voltage in V\n", + "V_D=1.6; #Forward voltage drop of LED, in V\n", + "I_F=20.0; #Required limited current through LED, in mA\n", + "\n", + "#Calculations\n", + "R_S=(V_S-V_D)/(I_F/1000); #Series resistor required to limit the current through the LED, in \u2126\n", + "\n", + "#Result \n", + "print(\"The value of series resistor required to limit the current through the LED = %d \u2126.\"%R_S);\n", + " \n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The value of series resistor required to limit the current through the LED = 420 \u2126.\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 7.2: Page number 128" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_S=15.0; #Supply voltage in V\n", + "V_D=2.0; #Forward voltage drop of LED, in V\n", + "R_S=2200.0; #Series resistor required to limit the current through the LED, in \u2126\n", + "\n", + "#Calculations\n", + "I_F=((V_S-V_D)/R_S)*1000; #Required limited current through LED, in mA\n", + "\n", + "#Result \n", + "print(\"The current through the LED in the circuit = %.2f mA\"%I_F);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The current through the LED in the circuit = 5.91 mA\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 7.3: Page number 132-133" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Ir=50.0; #Dark current as observed from the current Illumination curve, in mA \n", + "V_R=10.0; #Reverse voltage in V\n", + "\n", + "#Calculation\n", + "R_R=V_R/(Ir/pow(10,6)); #Dark Resistance in \u2126\n", + "\n", + "#Result\n", + "print(\"The dark resistance is=%d k\u2126\"%(R_R/1000));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The dark resistance is=200 k\u2126\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 7.4: Page number 133" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "E=2.5; #Illumination in mW/cm\u00b2\n", + "m=37.4; #sensitivity of the photodiode in \ud835\udf07A/mW/cm\u00b2\n", + "\n", + "#Calculations\n", + "I_R=m*E; #Reverse current in \ud835\udf07A\n", + "\n", + "#Result\n", + "print(\"The reverese current in the photodiode = %.1f \ud835\udf07A\"%I_R);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The reverese current in the photodiode = 93.5 \ud835\udf07A\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 7.5: Page number 137" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "from math import sqrt\t\n", + "#Variable declaration\n", + "L=1.0; #Inductance of the inductor in mH\n", + "C=100.0; #Capacitance of the varactor in pF\n", + "\n", + "#Result\n", + "f_r=1/(2*pi*sqrt(L*pow(10,-3)*C*pow(10,-12))); #Resonant frequency of the circuit in Hz\n", + "f_r=f_r/1000; #Resonant frequency of the circuit in kHz\n", + "\n", + "#Result\n", + "print(\"The resonant frequency of the circuit = %.1f kHz\"%f_r);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The resonant frequency of the circuit = 503.3 kHz\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter8_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter8_1.ipynb new file mode 100644 index 00000000..4afe0858 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter8_1.ipynb @@ -0,0 +1,1851 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:9c13bdd66a3dbb3eae04903205b69bc52bf35e6dadf8b1b3ade1bab68394ae3b" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.1: Page number 147-148\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "Signal=500.0; #Signal voltage in V\n", + "Rin=20.0; #Input resistance in \u03a9 \n", + "Rout=100.0; #Output resistance in \u03a9\n", + "R_C=1000.0; #Collector load in \u03a9\n", + "alpha_ac=1.0; #current amplification factor\n", + "\n", + "#Calculation\n", + "I_E=(Signal/1000)/Rin; \t#Input current in mA\n", + "I_C=I_E*alpha_ac; #Output current in mA\n", + "Vout=I_C*R_C; #Output voltage in V \n", + "Av=Vout/(Signal/1000); #Voltage amplification \n", + "\n", + "#Result\n", + "print(\"The voltage amplification = %d. \"%Av);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage amplification = 50. \n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.2: Page number 150\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_E=1; #Emitter curent in mA\n", + "I_C=0.95; #Collector current in mA\n", + "\n", + "#Calculation\n", + "I_B=I_E-I_C; #Base current in mA\n", + "\n", + "#Result \n", + "print(\"The base current = %.2f mA \"%I_B);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The base current = 0.05 mA \n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 8.3: Page number 150\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#variable declaration\n", + "alpha=0.9; #Current amplification factor\n", + "I_E=1; #Emitter current in mA\n", + "\n", + "#Calculation\n", + "I_C=alpha*I_E; #Collector current in mA\n", + "I_B=I_E-I_C; #Base current in mA\n", + "\n", + "#Result\n", + "print(\"The base current =%.1f mA\"%I_B);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The base current =0.1 mA\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.4: Page number 150\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_C=0.95;\t\t\t#Collector current in mA\n", + "I_B=0.05;\t\t\t#Base current in mA\n", + "\n", + "#Calculation\n", + "I_E=I_B+I_C; #Emitter current in mA\n", + "alpha=I_C/I_E; #Current amplification factor \n", + "\n", + "#Result\n", + "print(\"The current amplification factor = %.2f .\"%alpha);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The current amplification factor = 0.95 .\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.5: Page number 150\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_E=1; #Emitter current in mA\n", + "I_CBO=50.0; #Collector current with emitter circuit open, in microAmp\n", + "alpha=0.92; #Current amplification factor\n", + "\n", + "#Calculation\n", + "I_C=alpha*I_E + (I_CBO/1000); #Total collector current in mA\n", + "\n", + "#Result\n", + "print(\"The total collector current = %.2f mA.\"%I_C);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The total collector current = 0.97 mA.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.6: Page number 150-151\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "alpha=0.95; #Current amplification factor\n", + "Rc=2.0; #Resistor connected to the collector, in kilo ohm\n", + "V_Rc=2.0; #Voltage drop across the resistor connected to the collector in V\n", + "\n", + "\n", + "#Calculation\n", + "I_C=V_Rc/Rc; #Collector current in mA\n", + "I_E=I_C/alpha; #Emitter current in mA\n", + "I_B=I_E-I_C; #Base current in mA\n", + "\n", + "#Result\n", + "print(\"The base current = %.2f mA\"%I_B); \n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The base current = 0.05 mA\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.7: Page number 151\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_EE=8.0; #Supply voltage at the emitter in V\n", + "V_CC=18.0; #Supply voltage at the collector in V\n", + "V_BE=0.7; #Base to emitter voltage in V\n", + "R_E=1.5; #Emitter resistance in \u03a9\n", + "R_C=1.2; #Collector resistance in \u03a9\n", + "\n", + "#Calculations\n", + "I_E=(V_EE-V_BE)/R_E; #Emitter current in mA\n", + "I_C=I_E; #Collector current in mA (approximately equal to emitter current)\n", + "V_CB=V_CC-(I_C*R_C); #Collector to base voltage in V\n", + "\n", + "#Result\n", + "print(\"The collector current =%.2f mA\"%I_C);\n", + "print(\"The collector to base voltage = %.2f V\"%V_CB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The collector current =4.87 mA\n", + "The collector to base voltage = 12.16 V\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.8:Page number 155\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Function for calculating beta from alpha\n", + "def calc_beta(a): #a is the value of alpha\n", + "\treturn(a/(1-a));\n", + "\n", + "#Case (i)\n", + "alpha=0.9; #current amplification factor\n", + "beta=calc_beta(alpha);\t\t#Base current amplification factor \n", + "print(\"(i) Value of beta =%d\"%beta );\t\t\t\t\t\t\t\t\t\n", + "\n", + "#Case (ii)\n", + "alpha=0.98; #current amplification factor\n", + "beta=calc_beta(alpha); #Base current amplification factor\n", + "print(\"(ii) Value of beta =%.0f\"%beta );\n", + "\n", + "\n", + "#Case (iii)\n", + "alpha=0.99; #current amplification factor\n", + "beta=calc_beta(alpha); #Base current amplification factor \n", + "print(\"(iii) Value of beta =%.0f\"%beta );\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Value of beta =9\n", + "(ii) Value of beta =49\n", + "(iii) Value of beta =99\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.9: Page number 155\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "beta=50.0; #Base current amplification factor\n", + "I_B=20.0; #Base current in microAmp\n", + "\n", + "#Calculation\n", + "I_B=I_B/1000; #Base current in mA\n", + "I_C=beta*I_B; #Collector current in mA\n", + "I_E=I_B+I_C; #Emitter current in mA\n", + "\n", + "#Result\n", + "print(\"The emitter curent = %.2f mA\"%I_E);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The emitter curent = 1.02 mA\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.10: Page number 155\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_B=240.0; #Base current in microAmp\n", + "I_E=12; #Emitter current in mA\n", + "beta=49.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "alpha=beta/(1+beta); #current amplification factor \n", + "I_C_alpha=alpha*I_E; #Collector current in mA calculated using alpha\n", + "I_C_beta=beta*(I_B/1000); #Collector current in mA calculated using beta\n", + "\n", + "#Results\n", + "print(\"alpha=%.2f.\"%alpha);\n", + "print(\"Collector current determined using alpha =%.2f mA\"%I_C_alpha);\n", + "print(\"Collector current determined using beta =%.2f mA\"%I_C_beta);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "alpha=0.98.\n", + "Collector current determined using alpha =11.76 mA\n", + "Collector current determined using beta =11.76 mA\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.11: Page number 156\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "beta=45.0; #Base current amplification factor\n", + "R_C=1.0; #Resistance of the collector resistance in k\u03a9\n", + "V_R_C=1.0; #Voltage drop across the collector resistance in V\n", + "\n", + "#Calculation\n", + "I_C=V_R_C/R_C; #Collector current in mA\n", + "I_B=I_C/beta; #Base current in mA\n", + "\n", + "#Result\n", + "print(\"The base current =%.3f mA\"%I_B);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The base current =0.022 mA\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.12: Page number 156\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=8.0; #Collector supply voltage in V\n", + "R_C=800.0; #Resistance of the collector resistance in \u03a9\n", + "V_R_C=0.5; #Voltage drop across collector resistance in V\n", + "alpha=0.96; #current amplification factor\n", + "\n", + "#Calculation\n", + "V_CE=V_CC-V_R_C; #Collector to emitter voltage in V\n", + "I_C=V_R_C/R_C; #Collector current in A\n", + "I_C=I_C*1000; #Collector current in mA\n", + "beta=alpha/(1-alpha); #Base current amplification factor\n", + "I_B=I_C/beta; #Base current in mA\n", + "\n", + "#Result\n", + "print(\"Collector to emitter voltage = %.1f V\"%V_CE);\n", + "print(\"Base current= %.3f mA\"%I_B);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector to emitter voltage = 7.5 V\n", + "Base current= 0.026 mA\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.13: Page number 156-157\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=5; \t#Collector supply voltage in V\n", + "I_CBO=0.2; \t#Leakage current at collector base junction with emitter open, in \u03bcA\n", + "I_CEO=20.0; \t#Leakage current with base open, in \u03bcA\n", + "I_C=1.0; #Collector current in mA\n", + "I_C=I_C*1000; \t#Collector current in \u03bcA\n", + "\n", + "\n", + "#Calculation\n", + "alpha=1-(I_CBO/I_CEO);\t\t#current amplification factor\n", + "I_E=(I_C-I_CBO)/alpha; #Emitter current in \u03bcA\n", + "I_E=round(I_E,-1);\n", + "I_B=I_E-I_C; #Base current in \u03bcA\n", + "I_B=round(I_B,-1);\n", + "\n", + "#Result\n", + "print(\"Current amplification factor = %.2f \"%alpha);\n", + "print(\"The emitter curent =%d \u03bcA \"%I_E);\n", + "print(\"The base curent =%d \u03bcA \"%I_B);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Current amplification factor = 0.99 \n", + "The emitter curent =1010 \u03bcA \n", + "The base curent =10 \u03bcA \n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.14: Page number 157\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_CEO=300.0; #Leakage current in common emitter configuration, in \u03bcA\n", + "beta=120.0; #Base current amplification factor\n", + "\n", + "#Calculation\n", + "alpha=beta/(1+beta); #Current amplification factor\n", + "alpha=round(alpha,3);\n", + "I_CBO=(1-alpha)*I_CEO; #Leakage current in common base configuration, in \u03bcA\n", + "\n", + "\n", + "#Result\n", + "print(\"Vale of I_CBO= %.1f \u03bcA\"%I_CBO);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vale of I_CBO= 2.4 \u03bcA\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.15: Page number 157\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_B=20.0; #Base current in \u03bcA\n", + "I_C=2.0; #Collector current in mA\n", + "beta=80.0; #Base current amplification factor\n", + "\n", + "#Calculation\n", + "I_CEO=I_C-(beta*I_B/1000); #Leakage current with base open, in mA \n", + "alpha=beta/(beta+1); #Current amplification factor\n", + "alpha=round(alpha,3);\n", + "I_CBO=(1-alpha)*I_CEO; #Leakage current with emitter open, in mA\n", + "\n", + "\n", + "#Result\n", + "print(\"Value of I_CBO=%.4f mA\"%I_CBO);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of I_CBO=0.0048 mA\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.17: Page number 158\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "beta=150.0; \t#Base current amplification factor\n", + "R_B=10.0; \t#Base resistance in kilo ohm\n", + "R_C=100.0; \t#Collector resistance in kilo ohm\n", + "V_CC=10.0; #Collector supply voltage in V\n", + "V_BB=5.0; #Base supply voltage in V\n", + "V_BE=0.7; #Base to emitter voltage in V\n", + "\n", + "\n", + "#Calculation\n", + "I_B=(V_BB-V_BE)/R_B; #Base current in mA\n", + "I_C=beta*I_B; #Collector current in mA\n", + "V_CE=V_CC - (I_C/1000)*R_C; #Collector to emitter voltage in V\n", + "V_CB=V_CE-V_BE; #Collector to base voltage in V\n", + "\n", + "\n", + "#Result \n", + "print(\"Collector to base voltage, V_CB= %.2f V\"%V_CB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector to base voltage, V_CB= 2.85 V\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.18: Page number158-159\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_B=68.0; #Base current in \u03bcA\n", + "I_E=30.0; #Emitter current in mA\n", + "beta=440.0;\t #Base current amplification factor\n", + "\n", + "#Calculation\n", + "alpha=beta/(beta + 1); #current amplification factor\n", + "I_C_alpha=alpha*I_E;\t\t#Collector current using alpha rating, in mA\n", + "I_C_beta=beta*(I_B/1000.0); #Collector current using beta rating, in mA\n", + "\n", + "#Result\n", + "print(\"Collector current determined using alpha rating =%.2f mA\"%I_C_alpha);\n", + "print(\"Collector current determined using beta rating =%.2f mA\"%I_C_beta);\n", + "\n", + "#Note: In the textbook, the collector current obtained from beta rating is approximated to 29.93 mA\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector current determined using alpha rating =29.93 mA\n", + "Collector current determined using beta rating =29.92 mA\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.19: Page number 159\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "I_C_max=500.0; #Maximum collector current in mA\n", + "beta_max=300.0; #Maximum base current amplification factor\n", + "\n", + "#Calculation\n", + "I_B_max=I_C_max/beta_max; #Maximum base current in mA\n", + "\n", + "\n", + "#Result\n", + "print(\"The maximum allowable value of base current = %.2f mA\"%I_B_max);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum allowable value of base current = 1.67 mA\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.22 : Page number 167-168" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "VCC=12.5; #Collector supply voltage, V\n", + "RC=2.5; #Collector resistor, k\u03a9\n", + "\n", + "#Calculation\n", + "#VCE=VCC-IC*RC\n", + "#For calculating VCE, IC=0\n", + "IC=0; #Collector current for maximum Collector-emitter voltage, mA\n", + "VCE_max=VCC-IC*RC; #Maximum collector-emitter voltage, V\n", + "\n", + "#For calculating VCE, IC=0\n", + "VCE=0; #Collector emitter voltage for maximum collector current, V\n", + "IC_max=(VCC-VCE)/RC; #Maximum collector current, mA\n", + "\n", + "\n", + "#Plotting of d.c load line\n", + "VCE_plot=[0,VCE_max]; #Plotting variable for VCE\n", + "IC_plot=[IC_max,0]; #Plotting variable for IC\n", + "p=plot(VCE_plot,IC_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,15])\n", + "limit.set_ylim([0,6])\n", + "xlabel('VCE(V)');\n", + "ylabel('IC(mA)');\n", + "title('d.c load line');\n", + "plt.grid();\n", + "show(p);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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IHTt2ICwsDKmpqfj666/x6KOPqh3LIaPRCKPRiJEjRwIAUlJSkJ+fr3Iqx/bs\n2YOwsDDceeed8PX1xfTp03Hw4EG1Y7UpKCgIJ06cAAAcP34cgYGBKidyjsViQU5OjuZ/cf73v/9F\nWVkZhg0bhrCwMFRUVGDEiBE4deqU7GurMtRjY2Px448/oqysDLW1tdiyZQumTp2qRhSnSZKEOXPm\nICIiApmZmWrHadOyZctQXl6O0tJSZGdnY8KECfjwww/VjuVQr169EBwcjJKSEgBNAzMyMlLlVI71\n69cPeXl5uHLlCiRJwp49exAhwLs3TJ06FR988AEA4IMPPtD8JgVoumLuzTffxPbt29GxY0e14zgU\nHR2NkydPorS0FKWlpTAajcjPz1fml6ekkpycHGnQoEFS//79pWXLlqkVw2n79++XDAaDNGzYMMlk\nMkkmk0n64osv1I7lFKvVKk2ZMkXtGE4pLCyUYmNjpaFDh0rTpk2Tzp8/r3akNr322mvSkCFDpKio\nKOnRRx+Vamtr1Y7UwqxZs6TevXtLHTp0kIxGo7RhwwapurpamjhxojRw4EBp0qRJ0rlz59SO2cLN\nmdevXy8NGDBACgkJsf38zZ07V+2YNs15b7/9dts5vlFYWJhUXV2tSBY++YiISEfEuCyCiIicwqFO\nRKQjHOpERDrCoU5EpCMc6kREOsKhTkSkIxzqREQ6wqFOujRhwgR89dVXLW5bs2YN5s2bh5KSEiQm\nJmLQoEEYMWIEHnzwQZw6dQpWqxXdunVDTEyM7WPv3r0AgCtXrsBsNqOxsRF33XWX7VmvzTIzM/HG\nG2/gX//6F9LT0xX7PoluxqFOupSamnrL65pv2bIFqampSEpKwvz581FSUoLDhw9j3rx5OH36NAwG\nA+6++24UFBTYPiZOnAig6VUBk5OT4ePjc8tjNzY24pNPPkFqaiqioqJQUVHR4rWNiJTEoU66lJyc\njM8//xz19fUAYHsVxR9//BFxcXG4//77bZ87btw4REZGOnwVvU2bNuGXv/wlgKZfGFu2bLHd9/e/\n/x39+vWzvZz0lClTNPdGGeQ9ONRJl3r06IFRo0YhJycHAJCdnY2ZM2eiuLgYw4cPt/t1+/fvb1G/\nlJaWora2Fj/99BNCQkIAAFFRUfDx8UFRUZHtsW98GdjY2Fjs379fxu+OyD4OddKtG2uSLVu2OPX6\n2/Hx8S3ql7CwMJw5cwb+/v6tPnZDQwO2b9+OGTNm2O4LCAjQ/LtikX5xqJNuTZ06FXv37kVBQQEu\nX76MmJihLsulAAABOUlEQVQYREZG4vDhwy49TqdOnXD16tUWt82aNQsfffQR9uzZg6FDhyIgIMB2\n39WrV9GpUyePfA9EruJQJ93q0qULxo8fj/T0dNsu/aGHHsLBgwdttQzQ1IkXFxfbfZzu3bujoaEB\ntbW1ttvuuusu9OzZE88///wt/wIoKSlBVFSUh78bIudwqJOupaam4siRI0hNTQUAdOzYETt37sS6\ndeswaNAgREZG4p133kFAQAAMBsMtnfq2bdsANL2T/c09eWpqKv7zn/9g+vTpLW7Pzc1FUlKSMt8g\n0U34eupETigoKMDq1avbfPeoa9euwWw248CBA8K84TfpC/+vI3JCTEwMxo8fj8bGRoefV15ejtdf\nf50DnVTDnToRkY5wO0FEpCMc6kREOsKhTkSkIxzqREQ6wqFORKQj/wfxISNkMYU3cgAAAABJRU5E\nrkJggg==\n", + "text": [ + "<matplotlib.figure.Figure at 0x7f2eadbe6710>" + ] + } + ], + "prompt_number": 41 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.23 : Page number 168" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage, V\n", + "RC=6.0; #Collector resistor, k\u03a9\n", + "IB=20.0; #Zero signal base current, \u03bcA\n", + "beta=50.0; #Base current amplification factor\n", + "\n", + "#Calculation\n", + "#VCE=VCC-IC*RC\n", + "#For calculating VCE, IC=0\n", + "IC=0; #Collector current for maximum Collector-emitter voltage, mA\n", + "VCE_max=VCC-IC*RC; #Maximum collector-emitter voltage, V\n", + "\n", + "#For calculating VCE, IC=0\n", + "VCE=0; #Collector emitter voltage for maximum collector current, V\n", + "IC_max=(VCC-VCE)/RC; #Maximum collector current, mA\n", + "\n", + "\n", + "#Plotting of d.c load line\n", + "VCE_plot=[0,VCE_max]; #Plotting variable for VCE\n", + "IC_plot=[IC_max,0]; #Plotting variable for IC\n", + "p=plot(VCE_plot,IC_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,15])\n", + "limit.set_ylim([0,5])\n", + "xlabel('VCE(V)');\n", + "ylabel('IC(mA)');\n", + "title('d.c load line');\n", + "plt.grid();\n", + "show(p);\n", + "\n", + "#Calculating Q-point\n", + "IC=beta*(IB/1000); #Collector current, mA\n", + "VCE=VCC-IC*RC; #Collector emitter voltage, V\n", + "\n", + "#Result\n", + "print(\"Operating point: IC=%dmA and VCE=%dV.\"%(IC,VCE));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f8947e0f0d0>" + ] + }, + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point: IC=1mA and VCE=6V.\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.24 : Page number 168" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "RC=4.0; #Collector load, k\u03a9\n", + "IC_Q=1.0; #Quiescent current, mA\n", + "\n", + "#Calculation\n", + "#(i)\n", + "VCC=10; #Collector supply voltage, V\n", + "VCE=VCC-IC*RC; #Collector emitter voltage, V\n", + "\n", + "print(\"(i) Operating point: VCE=%dV and IC=%dmA.\"%(VCE,IC) );\n", + "\n", + "#(ii)\n", + "RC=5.0; #Collector load, k\u03a9\n", + "VCE=VCC-IC*RC; #Collector emitter voltage, V\n", + "print(\"(ii) Operating point: VCE=%dV and IC=%dmA.\"%(VCE,IC) );\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Operating point: VCE=6V and IC=1mA.\n", + "(ii) Operating point: VCE=5V and IC=1mA.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "##Example 8.25 : Page number 168-169" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage, V\n", + "VBB=10.0; #Base supply voltage, V\n", + "RC=330.0; #Collector resistor, \u03a9\n", + "RB=47.0; #Base resistoe, k\u03a9\n", + "beta=200.0; #Base current amplification factor\n", + "VBE=0.7; #Base -emitter voltage, V\n", + "\n", + "#Calculation\n", + "#VBB-IB*RB-VBE=0\n", + "IB=round(((VBB-VBE)/RB)*1000,0); #Base current, \u03bcA\n", + "IC=beta*IB/1000; #Collector current, mA\n", + "VCE=VCC-IC*(RC/1000); #Collector-emitter voltage, V\n", + "\n", + "print(\"Operating point: IC=%.1fmA and VCE=%.2fV.\"%(IC,VCE));\n", + "\n", + "#For d.c load line\n", + "#VCE=VCC-IC*RC\n", + "#For calculating VCE, IC=0\n", + "IC=0; #Collector current for maximum Collector-emitter voltage, mA\n", + "VCE_max=VCC-IC*RC; #Maximum collector-emitter voltage, V\n", + "\n", + "#For calculating VCE, IC=0\n", + "VCE=0; #Collector emitter voltage for maximum collector current, V\n", + "IC_max=(VCC-VCE)/(RC/1000.0); #Maximum collector current, mA\n", + "\n", + "\n", + "#Plotting of d.c load line\n", + "VCE_plot=[0,VCE_max]; #Plotting variable for VCE\n", + "IC_plot=[IC_max,0]; #Plotting variable for IC\n", + "p=plot(VCE_plot,IC_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,25])\n", + "limit.set_ylim([0,65])\n", + "xlabel('VCE(V)');\n", + "ylabel('IC(mA)');\n", + "title('d.c load line');\n", + "plt.grid();\n", + "show(p);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point: IC=39.6mA and VCE=6.93V.\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f8947baebd0>" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.26 : Page number 169-170" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "VEE=10.0; #Emitter supply voltage, V\n", + "RC=1.0; #Collector resistor, k\u03a9\n", + "RE=4.7; #Collector resistor, k\u03a9\n", + "RB=47.0; #Base resistoe, k\u03a9\n", + "beta=100.0; #Base current amplification factor\n", + "VBE=0.7; #Base -emitter voltage, V\n", + "\n", + "#Calculation\n", + "#-IB*RB-VBE-IE*RE+VEE=0\n", + "#AS, IC=beta*IB and IC~IE\n", + "IE=round((VEE-VBE)/(RE+(RB/beta)),1); #Emitter current, mA\n", + "IC=IE; #Collector current, mA\n", + "\n", + "#VCC-IC*RC-VCE-IE*RE+VEE=0\n", + "#IC~IE\n", + "VCE=VCC+VEE-IC*(RC+RE); #Collector-emitter voltage, V\n", + "\n", + "print(\"Operating point: IC=%.1fmA and VCE=%.2fV.\"%(IC,VCE));\n", + "\n", + "\n", + "#For d.c load line\n", + "#VCE=VCC-IC*RC\n", + "#For calculating VCE, IC=0\n", + "IC=0; #Collector current for maximum Collector-emitter voltage, mA\n", + "VCE_max=VCC+VEE-IC*(RC+RE); #Maximum collector-emitter voltage, V\n", + "\n", + "#For calculating VCE, IC=0\n", + "VCE=0; #Collector emitter voltage for maximum collector current, V\n", + "IC_max=(VCC+VEE-VCE)/(RC+RE); #Maximum collector current, mA\n", + "\n", + "\n", + "#Plotting of d.c load line\n", + "VCE_plot=[0,VCE_max]; #Plotting variable for VCE\n", + "IC_plot=[IC_max,0]; #Plotting variable for IC\n", + "p=plot(VCE_plot,IC_plot);\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,25])\n", + "limit.set_ylim([0,5])\n", + "xlabel('VCE(V)');\n", + "ylabel('IC(mA)');\n", + "title('d.c load line');\n", + "plt.grid();\n", + "show(p);\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point: IC=1.8mA and VCE=9.74V.\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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CpCTzBRCodFx4R8VeJMh17mzm4w8ZAj17wt13Q16e3VGJv6lnLxJCDhyA8eNN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\nQmCC\n", + "text": [ + "<matplotlib.figure.Figure at 0x7f8947c78950>" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.27 : Page number 170-171" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VEE=10.0; #Emitter supply voltage, V\n", + "IE=1.8; #Emitter current, mA\n", + "RE=4.7; #Emitter resistor, k\u03a9\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "VCC=10.0; #Collector supply voltage, V\n", + "IC=1.8; #Collector current, mA\n", + "RC=1.0; #Collector resistor, k\u03a9\n", + "\n", + "\n", + "#Calculation\n", + "#(i)\n", + "VE=-VEE+IE*RE; #Emitter voltage, V\n", + "\n", + "#(ii)\n", + "VB=VEE+VBE; #Base voltage, V\n", + "\n", + "#(iii)\n", + "VC=VCC-IC*RC; #Collector voltage, V\n", + "\n", + "\n", + "#Result\n", + "print(\"(i) Emitter voltage=%.2fV.\"%VE);\n", + "print(\"(i) Base voltage=%.1fV.\"%VB);\n", + "print(\"(i) Collector voltage=%.1fV.\"%VC);\n", + "\n", + "#Note: In the textbook, VB=VE+VBE has been written, which is worng. It should be VB=VEE+VBE. " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Emitter voltage=-1.54V.\n", + "(i) Base voltage=10.7V.\n", + "(i) Collector voltage=8.2V.\n" + ] + } + ], + "prompt_number": 39 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "\n", + "Example 8.28: Page number 173-174\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_BE_change=200.0; #Change in base-emitter voltage in mV\n", + "I_B_change=100.0; #Change in base current in \u03bcA\n", + "\n", + "#Calculations\n", + "Ri=V_BE_change/I_B_change; #Input resistance in k\u03a9\n", + "\n", + "#Result\n", + "print(\"Input resistance =%d k\u03a9\"%Ri);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Input resistance =2 k\u03a9\n" + ] + } + ], + "prompt_number": 35 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.29; Page number 174\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CE_final=10.0;\t\t\t#Final value of collector-emitter voltage in V\n", + "V_CE_initial=2.0; #Initial value of collector-emitter voltage in V\n", + "I_C_final=3.0; #Final value of collector current in mA\n", + "I_C_initial=2.0; #Initial value of collector current in mA\n", + "\n", + "#Calculations\n", + "V_CE_change=V_CE_final-V_CE_initial;\t\t#Change in collector to emitter voltage in V\n", + "I_C_change=I_C_final-I_C_initial; #Change in collector current in mA\n", + "R0=V_CE_change/I_C_change; #Output resistance in k\u03a9\n", + "\n", + "#Result\n", + "print(\"The output resistance =%dk\u03a9\"%R0);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The output resistance =8k\u03a9\n" + ] + } + ], + "prompt_number": 34 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.30: Page number 174\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "R_C=2.0;\t\t#Collector load in kilo ohm\n", + "R_i=1.0;\t\t#Input resistance in kilo ohm\n", + "R_AC=R_C; #Effective collector load for single stage in kilo ohm(appoximately equal to collector load for single stage)\n", + "beta=50.0; #Current gain\n", + "\n", + "#Calculations\n", + "A_v=beta*(R_AC/R_i);\t\t#Voltage gain of the amplifier\n", + "\n", + "#Result \n", + "print(\"The voltage gain of the amplifier =%d \"%A_v);\t\t\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The voltage gain of the amplifier =100 \n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.31: Page number 175-176\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=20;\t\t#Collector supply voltage in V\n", + "R_C=1; #Collector resistance in kilo ohm\n", + "V_knee_Si=1;\t\t#Knee voltage of V_CE for Si in V \n", + "V_knee_Ge=0.5;\t\t#Knee voltage of V_CE for Ge in V\n", + "\n", + "#Calculations\n", + "I_C_sat_Si=(V_CC-V_knee_Si)/R_C;\t\t#Saturation (maximum) value of collector current in mA (for Si transistor)\n", + "I_C_sat_Ge=(V_CC-V_knee_Ge)/R_C;\t\t#Saturation (maximum) value of collector current in mA (for Ge transistor)\n", + "I_C_sat=(V_CC)/R_C;\t\t\t\t#Saturation (maximum) value of collector current in mA (neglecting knee voltage)\n", + "V_CE_cut_off=V_CC; #Collector to emitter voltage in cutoff when base current=0, in V\n", + "\n", + "#Result\n", + "print(\"Collector current during saturation = %d mA\"%I_C_sat);\n", + "print(\"Collector emitter voltage during cutoff = %d V.\"%V_CE_cut_off);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector current during saturation = 20 mA\n", + "Collector emitter voltage during cutoff = 20 V.\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.32: Page number 176-177\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=12.0;\t\t#Collector supply voltage in V\n", + "V_EE=12.0;\t\t#Emitter supply voltage in V\n", + "R_C=750.0;\t\t#Collector resistance in ohm\n", + "R_E=1.5;\t\t#Emitter resistance in kilo ohm\n", + "R_B=100.0;\t\t#Base resistance in ohm\n", + "beta=200;\t\t#base current amplification factor\n", + "\n", + "#Calculations\n", + "\n", + "#Applying Kirchhoff's voltage law to the collector side of the circuit\n", + "#using the equation: Vcc -IcRc-Vce -IeRe+Vee=0\n", + "#we get Vce=Vcc+Vee-Ic(Rc+Re), [Ie=Ic, approximately]\n", + "#We get Vce(off), when Ic=0;\n", + "\n", + "I_C_Vce_off=0;\t\t\t\t\t#Collector current for Vce(off) in mA\n", + "V_CE_off=V_CC+V_EE -(I_C_Vce_off * (R_C +R_E));\t#Collector to emitter voltage in V, during transistor in off state\n", + "\n", + "#We get Ic(sat), when Vce=0\n", + "V_CE_Ic_sat=0;\t\t\t\t\t\t#Collector to emitter voltage for saturation current of collector in V\n", + "I_C_sat=(V_CC+V_EE-V_CE_Ic_sat)/(R_C+(R_E*1000));\t#Saturated collector current in A \n", + "I_C_sat=I_C_sat*1000;\t\t\t\t\t#Saturated collector current in mA\n", + "#Result\n", + "print(\"Vce(off)= %dV\"%V_CE_off);\n", + "print(\"Ic(sat) = %.2f mA\"%I_C_sat);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Vce(off)= 24V\n", + "Ic(sat) = 10.67 mA\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.33 : Page number 177\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_knee=0.2;\t\t\t\t#Knee voltage of collector-emitter voltage in V\n", + "V_CC=10.0;\t\t\t\t#Collector supply voltage in V\n", + "V_BB=3.0;\t\t\t\t#Base supply voltage in V\n", + "V_BE=0.7;\t\t\t\t#Base-emitter voltage in V \t\n", + "R_B=10.0;\t\t\t\t#Base resistor's resistance in kilo ohm\n", + "R_C=1.0;\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "beta=50.0;\t\t\t\t#base current amplification factor\n", + "\n", + "#Calculations\n", + "\n", + "#applying Kirchhoff's voltage law along the collector side of the circuit,\n", + "#We get Vcc-Ic(sat)*Rc-V_knee=0\n", + "#From the above equation, we get:\n", + "I_C_sat=(V_CC-V_knee)/R_C;\t\t#Saturated collector current in mA\n", + "\n", + "#Applying Kirchhoff's voltage law along base emitter side,\n", + "#We get VBB-IB*RB-VBE=0;\n", + "#From the above equation, we get:\n", + "I_B=(V_BB-V_BE)/R_B;\t\t\t#Base current in mA\n", + "\n", + "\n", + "I_C=beta*I_B\t\t\t\t#Collector current in mA\n", + "\n", + "#Result\n", + "if(I_C>I_C_sat):\n", + "\tprint(\"The base current is large enough to produce Ic greater than Ic(sat), therefore the transistor is saturated.\");\n", + "else:\n", + "\tprint(\"The base current is not large enough to produce Ic greater than Ic(sat), therefore the transistor isn't saturated. \");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The base current is large enough to produce Ic greater than Ic(sat), therefore the transistor is saturated.\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.34: Page number 177-178\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "V_CC=10.0;\t\t\t\t#Collector supply voltage in V\n", + "V_BE=0.95;\t\t\t\t#Base-emitter voltage in V \t\n", + "I_B=100.0;\t\t\t\t#Base current in microAmp\n", + "R_C=970.0;\t\t\t\t#Collector resistor's resistance in ohm\n", + "beta=100.0;\t\t\t\t#base current amplification factor\n", + "\n", + "#Calculations\n", + "I_C=(I_B/1000)*beta;\t\t\t\t#Collector current in mA \n", + "\n", + "#Applying Kirchhoff's voltage law along collector side\n", + "#We get Vcc-IcRc-Vce=0\n", + "#From the above equation, we get:\n", + "\n", + "V_CE=V_CC-((I_C/1000)*R_C);\t\t\t\t#Collector-emitter voltage in V\n", + "\n", + "#From the equation, V_CE=V_CB+V_BE,\n", + "V_CB=V_CE-V_BE;\t\t\t\t\t\t#Collector-base voltage in V\n", + "\n", + "\n", + "#Result\n", + "if(V_CB<0 and V_BE >0):\n", + "\tprint(\"As both collector-base and emitter-base junction are forward biased, the transistor is operating in the saturation region. \");\n", + "else:\n", + "\tprint(\"No. The transistor isn't operating in the saturation region.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "As both collector-base and emitter-base junction are forward biased, the transistor is operating in the saturation region. \n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.35: Page number 178\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=10.0;\t\t\t\t#Collector supplu voltage in V\n", + "V_BE=0.7;\t\t\t\t#Base-emitter voltage in V\n", + "R_B=50.0;\t\t\t\t#Base resistor's resistance in kilo ohm\n", + "R_C=2.0;\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "beta=200.0;\t\t\t\t#Base current amplification factor\n", + "\n", + "#Calculations\n", + "\n", + "#Applying Kirchhoff's voltage law along the collector side,\n", + "#We get, Vcc-Ic(sat)*Rc-Vce=0;\n", + "#From the above equation, we get:\n", + "#I_C_sat=(V_CC-V_CE)/R_C, but as transistor goes into saturation, Vce=0;\n", + "\n", + "V_CE=0;\t\t\t\t\t\t#Collector-emiter voltage in V, for transistor in saturation \n", + "I_C_sat=(V_CC-V_CE)/R_C;\t\t\t#Saturated collector current in mA\n", + "\n", + "I_B=I_C_sat/beta;\t\t\t\t#Base current in mA\n", + "\n", + "#Applying Kirchhoff's voltage law to the base circuit,\n", + "#We get, VBB - IB*RB - VBE=0\n", + "#From the above equation. we get:\n", + "V_BB=V_BE+ I_B*R_B;\t\t\t\t#Base supply voltage to put transistor in saturation, in V\n", + "\n", + "#Result\n", + "print(\"Therefore, for putting transistor in saturation, VBB >= %.2f V\"%V_BB);\n", + " \n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Therefore, for putting transistor in saturation, VBB >= 1.95 V\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.36: Page number 178-179\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=10.0;\t\t\t#Collector supply voltage in V\n", + "V_BB=2.7;\t\t\t#Base supply voltage in V\n", + "V_BE=0.7;\t\t\t#Base-emitter voltage in V\n", + "beta=100.0;\t\t\t#Base current amplification factor\n", + "R_E=1.0;\t\t\t#Emitter resistor's resistance in kilo ohm\n", + "\n", + "\n", + "#Calcultaion\t\n", + "V_B=V_BB;\t\t\t#Base voltage in V\n", + "V_E=V_B-V_BE;\t\t\t#Emitter voltage in V\n", + "I_E=V_E/R_E;\t\t\t#Emitter current in mA\n", + "I_C=I_E;\t\t\t#Collector current (approximately equal to emitter current) in mA\n", + "I_B=I_C/beta;\t\t\t#Base current in mA\n", + "\n", + "#Case (i):\n", + "R_C=2;\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "\n", + "#Assuming transistor to be in active state\n", + "#Applying Kirchhoff's voltage law along collector side,\n", + "#We get,Vcc-IcRc=Vc,\n", + "\n", + "V_C=V_CC-I_C*R_C;\t\t#Collector voltage in V\n", + "\n", + "if(V_C>V_E):\n", + "\tprint(\"(i)Our assumption was correct, the transistor is in active state for Rc=2 kilo ohm.\");\n", + "elif(V_C<V_E):\n", + "\tprint(\"(i)Our assumption was wrong, the transistor is in saturation for Rc=2 kilo ohm.\");\n", + "elif(V_C==V_E):\n", + "\tprint(\"(i)The transistor is at the edge of saturation for Rc=2 kilo ohm, therefore relation between transistor currents are same for both saturation and active state.\");\n", + "\n", + "#Case (ii):\n", + "R_C=4;\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "\n", + "#Assuming transistor to be in active state\n", + "#Applying Kirchhoff's voltage law along collector side,\n", + "#We get,Vcc-IcRc=Vc,\n", + "\n", + "V_C=V_CC-I_C*R_C;\t\t#Collector voltage in V\n", + "if(V_C>V_E):\n", + "\tprint(\"(ii)Our assumption was correct, the transistor is in active state for Rc=4 kilo ohm.\");\n", + "elif(V_C==V_E):\n", + "\tprint(\"(ii)The transistor is at the edge of saturation for Rc=4 kilo ohm, therefore relation between transistor currents are same for both saturation and active state.\");\n", + "elif(V_C<V_E):\n", + "\tprint(\"(ii)Our assumption was wrong, the transistor is in saturation for Rc=4 kilo ohm.\");\n", + "\n", + "\n", + "#Case (iii):\n", + "R_C=8;\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "\n", + "#Assuming transistor to be in active state\n", + "#Applying Kirchhoff's voltage law along collector side,\n", + "#We get,Vcc-IcRc=Vc,\n", + "\n", + "V_C=V_CC-I_C*R_C;\t\t#Collector voltage in V\n", + "if(V_C>V_E):\n", + "\tprint(\"(iii)Our assumption was correct, the transistor is in active state for Rc=8 kilo ohm.\");\n", + "elif(V_C<V_E):\n", + "\tprint(\"(iii)Our assumption was wrong, the transistor is in saturation for Rc=8 kilo ohm.\");\n", + "elif(V_C==V_E):\n", + "\tprint(\"(iii)The transistor is at the edge of saturation for Rc=8 kilo ohm, therefore relation between transistor currents are same for both saturation and active state.\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)Our assumption was correct, the transistor is in active state for Rc=2 kilo ohm.\n", + "(ii)The transistor is at the edge of saturation for Rc=4 kilo ohm, therefore relation between transistor currents are same for both saturation and active state.\n", + "(iii)Our assumption was wrong, the transistor is in saturation for Rc=8 kilo ohm.\n" + ] + } + ], + "prompt_number": 25 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.37 : Page number 179-180" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=15.0;\t\t\t#Collector supply voltage in V\n", + "R_C=10.0;\t\t\t#Collector resistor's resistance in kilo ohm\n", + "V_BE=0.7;\t\t\t#Base-emitter voltage in V\n", + "beta=100.0;\t\t\t#Base current amplification factor\n", + "R_E=1.0;\t\t\t#Emitter resistor's resistance in kilo ohm\n", + "\n", + "\n", + "#Calculation\t\n", + "\n", + "#Case (i):\n", + "V_BB=0.5;\t\t\t#Base supply voltage in V\n", + "VB=V_BB; #Base voltage, V\n", + "print(\"(i) Base voltage =%.1fV is less than VBE=%.1fV, therefore, transistor is cut-off.\"%(VB,V_BE));\n", + "\n", + "\n", + "#Case (ii):\n", + "V_BB=1.5;\t\t\t#Base supply voltage in V\n", + "VB=V_BB; #Base voltage, V\n", + "VE=VB-V_BE; #Emitter voltage, V\n", + "IE=round(VE/R_E,1); #Emitter current, mA\n", + "#Assuming transistor to be in active state\n", + "#Applying Kirchhoff's voltage law along collector side,\n", + "IC=IE; #Collector current, mA\n", + "IB=IC/beta; #Base current, mA\n", + "VC=V_CC-IC*R_C; #Collector voltage, V\n", + "print(VE,IE,VC);\n", + "print(\"(ii) VC=%dV > VE=%.1fV, therefore the transistor is active. Our assumption was correct.\"%(VC,VE));\n", + "\n", + "#Case (iii):\n", + "V_BB=3; \t\t\t#Base supply voltage in V\n", + "VB=V_BB; #Base voltage, V\n", + "VE=VB-V_BE; #Emitter voltage, V\n", + "IE=round(VE/R_E,1); #Emitter current, mA\n", + "#Assuming transistor to be in active state\n", + "#Applying Kirchhoff's voltage law along collector side,\n", + "IC=IE; #Collector current, mA\n", + "IB=IC/beta; #Base current, mA\n", + "VC=V_CC-IC*R_C; #Collector voltage, V\n", + "\n", + "print(\"(iii) VC=%dV < VE=%.1fV, therefore the transistor is saturated. Our assumption was wrong.\"%(VC,VE));" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Base voltage =0.5V is less than VBE=0.7V, therefore, transistor is cut-off.\n", + "(0.8, 0.8, 7.0)\n", + "(ii) VC=7V > VE=0.8V, therefore the transistor is active. Our assumption was correct.\n", + "(iii) VC=-8V < VE=2.3V, therefore the transistor is saturated. Our assumption was wrong.\n" + ] + } + ], + "prompt_number": 41 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.38: Page number 181\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "P_D_max=100.0;\t\t\t#Maximum power dissipation of a transistor in mW\n", + "V_CE=20.0;\t\t\t#Collector emitter voltage in V\n", + "\n", + "#Calculation\n", + "#As power=curent*voltage\n", + "#P_D_max=I_C_max*V_CE\n", + "#From the above equation, we get:\n", + "\n", + "I_C_max=P_D_max/V_CE;\t\t#Maximum collector current that can be allowed without destruction of the transistor, in mA\n", + "\n", + "#Result\n", + "print(\"Maximum collector current that can be allowed without destruction of the transistor = %d mA.\"%I_C_max); \n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Maximum collector current that can be allowed without destruction of the transistor = 5 mA.\n" + ] + } + ], + "prompt_number": 27 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.39: Page number 181\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=5.0;\t\t\t\t#Collector supply voltage in V\n", + "V_BB=5.0;\t\t\t\t#Base supply voltage in V\n", + "V_BE=0.7;\t\t\t\t#Base-emitter voltage in V\n", + "R_B=1.0;\t\t\t\t#Base resistor's resistance in kilo ohm\n", + "R_C=0;\t\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "beta=200.0;\t\t\t\t#base current amplification factor\n", + "\n", + "#Calculation\n", + "\n", + "#Applying Kirchhoff's voltage law along base circuit<\n", + "#We get, VBB- IB*RB - VBE=0.\n", + "#From the above equation, we get:\n", + "\n", + "I_B=(V_BB-V_BE)/R_B;\t\t\t#Base current in mA\n", + "\n", + "I_C=beta*I_B;\t\t\t\t#Collector current in mA\n", + "\n", + "#Applying Kirchhoff's voltage law along collector circuit:\n", + "\n", + "V_CE=V_CC-I_C*R_C;\t\t\t#Collector-emitter voltage in V\n", + "\n", + "#As power=curent*voltage\n", + "#P_D=I_C*V_CE\n", + "#From the above equation, we get:\n", + "P_D=V_CE*I_C;\t\t\t\t#Power dissipated in mW\n", + "P_D=P_D/1000;\t\t\t\t#Power dissipated in W\n", + "\n", + "#Result\n", + "print(\"Power dissipated = %.1fW\"%P_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power dissipated = 4.3W\n" + ] + } + ], + "prompt_number": 28 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.40: Page number 181-182\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=5.0;\t\t\t\t#Collector supply voltage in V\n", + "V_BB=1.0;\t\t\t\t#Base supply voltage in V\n", + "V_BE=0.7;\t\t\t\t#Base-emitter voltage in V\n", + "R_B=10.0;\t\t\t\t#Base resistor's resistance in kilo ohm\n", + "R_C=1.0;\t\t\t\t\t#Collector resistor's resistance in kilo ohm\n", + "beta=100.0;\t\t\t\t#base current amplification factor\n", + "\n", + "#Calculation\n", + "\n", + "#Applying Kirchhoff's voltage law along base circuit<\n", + "#We get, VBB- IB*RB - VBE=0.\n", + "#From the above equation, we get:\n", + "\n", + "I_B=(V_BB-V_BE)/R_B;\t\t\t#Base current in mA\n", + "\n", + "I_C=beta*I_B;\t\t\t\t#Collector current in mA\n", + "\n", + "#Applying Kirchhoff's voltage law along collector circuit:\n", + "\n", + "V_CE=V_CC-I_C*R_C;\t\t\t#Collector-emitter voltage in V\n", + "\n", + "#As power=curent*voltage\n", + "#P_D=I_C*V_CE\n", + "#From the above equation, we get:\n", + "P_D=V_CE*I_C;\t\t\t\t#Power dissipated in mW\n", + "\n", + "\n", + "#Result\n", + "print(\"Power dissipated = %.0fmW\"%P_D);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power dissipated = 6mW\n" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 8.41 : Page number 182" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VBB=5.0; #Base supply voltage, V\n", + "RB=22.0; #Base resistor, kilo ohm\n", + "RC=1.0; #Collector resistor, kilo ohm\n", + "beta=100.0; #Base current amplification factor\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "PD_max=800.0; #Maximum power dissipation, mW\n", + "VCE_max=15.0; #Maximum collector-emitter voltage, V\n", + "IC_max=100.0; #Maximum collector current, mA\n", + "\n", + "#Calculation\n", + "IB=((VBB-VBE)/RB)*1000; #Base current, \u03bcA\n", + "IC=beta*IB/1000; #Collector current, mA\n", + "\n", + "print(\"IC=%.1fmA is much less than IC_max=%dmA. Therefore, will not change with VCC and current rating is not exceeded.\"%(IC,IC_max));\n", + "\n", + "#VCC=VCE+IC*RC\n", + "VCC_max=VCE_max+IC*RC; #Maximum value of Collector supply voltage, V\n", + "PD=VCE_max*IC; #Power dissipation, mW\n", + "\n", + "print(\"PD=%dmW is less than PD_max=%dmW. Therefore, power rating is not exceeded.\"%(PD,PD_max));\n", + "\n", + "print(\"If base current is removed, transistor will turn off. Hence, VCE_max will be exceeded because entire supply voltage VCC will be dropped across the transistor.\");" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "IC=19.5mA is much less than IC_max=100mA. Therefore, will not change with VCC and current rating is not exceeded.\n", + "PD=293mW is less than PD_max=800mW. Therefore, power rating is not exceeded.\n", + "If base current is removed, transistor will turn off. Hence, VCE_max will be exceeded because entire supply voltage VCC will be dropped across the transistor.\n" + ] + } + ], + "prompt_number": 33 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter9_1.ipynb b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter9_1.ipynb new file mode 100644 index 00000000..e8168ab8 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/chapter9_1.ipynb @@ -0,0 +1,1907 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:1e5463fc2e8c67a2f9099cf3f6c078bc1c9dccccd63589a75ad6ce5024fe6432" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "CHAPTER 9 : TRANSISTOR BIASING" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.1: Page number 195-196" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "V_CC=6.0; #Collector supply voltage\n", + "R_C=2.5; #Collector load in k\u2126\n", + "\n", + "#Calculations\n", + "\n", + "#(i)\n", + "#For faithful amplification Vce (collector-emitter voltage)> 1V for Si transistor.\n", + "V_CE_max=1; #Maximum allowed collector-emitter voltage for faithful amplification, in V.\n", + "V_Rc_max=V_CC-V_CE_max; #maximum voltage drop across collector load in V.\n", + "I_C_max=V_Rc_max/R_C; #Maximum allowed collector current in mA\n", + "\n", + "#(ii)\n", + "IC_min_zero_signal=I_C_max/2; #Minimum zero signal collector current in mA\n", + "\n", + "#Results\n", + "print(\"The maximum allowed collector current during application of signal for faithful amplification = %d mA.\"%I_C_max);\n", + "print(\"The minimum zero signal collector current required = %d mA.\"%IC_min_zero_signal);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The maximum allowed collector current during application of signal for faithful amplification = 2 mA.\n", + "The minimum zero signal collector current required = 1 mA.\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.2: Page number 196\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=13.0; #Collector supply voltage in V\n", + "V_knee=1.0; #Knee voltage in V\n", + "R_C=4.0; #Collector load in k\u2126\n", + "rate_IC_VBE=5.0; #Rate of change of collector current IC with base-emitter voltage VBE in mA/V.\n", + "beta=100.0; #base current amplification factor\n", + "\n", + "\n", + "#Calculations\n", + "V_Rc_max=VCC-V_knee; #Maximum allowed voltage across collector load in V\n", + "I_C_max=V_Rc_max/R_C; #Maximum allowed collector current in mA\n", + "I_B_max=I_C_max/beta; #Maximum base current in mA\n", + "I_B_max=I_B_max*1000; #Maximum base current in \ud835\udf07A\n", + "\n", + "V_B_max=I_C_max/rate_IC_VBE; #Maximum base voltage signal in V\n", + "V_B_max=V_B_max*1000; #Maximum base voltage signal in mV\n", + "\n", + "#Results\n", + "print(\"Maximum base current =%d \ud835\udf07A.\"%I_B_max);\n", + "print(\"Maximum input signal voltage =%d mV.\"%V_B_max);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Maximum base current =30 \ud835\udf07A.\n", + "Maximum input signal voltage =600 mV.\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.3: Page number 200-201" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=9.0; #Colector supply voltage in V\n", + "VBB=2.0; #Base supply voltage in V\n", + "R_B=100.0; #Base resistor's resistance in k\u2126\n", + "R_C=2.0; #Collector load in k\u2126\n", + "beta=50.0; #base current amplification factor\n", + "\n", + "#Calculations\n", + "\n", + "#Case (i):\n", + "\n", + "#Applying Kirchhoff's law to the input circuit\n", + "#We get, IB*RB +VBE =VBB.\n", + "#Neglecting the small base-emitter voltage, we get:\n", + "I_B=VBB/R_B; #Base current in mA\n", + "I_C=beta*I_B; #Collector current in mA\n", + "\n", + "print(\"Collector current = %dmA\"%I_C);\n", + "\n", + "#Applying Kirchhoff's law to the output ciruit\n", + "#We get, IC*RC + VCE= VCC.\n", + "#From the above equation, we get:\n", + "V_CE=VCC-I_C*R_C; #Collector emitter voltage in V\n", + "\n", + "print(\"Collector emitter voltage =%dV.\"%V_CE);\n", + "\n", + "\n", + "#Case (ii):\n", + "\n", + "R_B=50.0;\n", + "I_B=VBB/R_B;\n", + "I_C=beta*I_B;\n", + "V_CE=VCC - I_C*R_C;\n", + "\n", + "print(\"The new operating point for base resistor RB=50 k\u2126 is, VCE=%dV and IC=%dmA.\"%(V_CE,I_C));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector current = 1mA\n", + "Collector emitter voltage =7V.\n", + "The new operating point for base resistor RB=50 k\u2126 is, VCE=5V and IC=2mA.\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.4: Page number 201-202" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#variable declaration\n", + "beta=100.0; #base current amplification factor\n", + "VCC=6.0; #Collector suply voltagein V\n", + "VBE=0.7 #Base emitter voltage in V\n", + "R_B=530.0; #Base resistor's resistance in k\u2126 .\n", + "R_C=2.0; #Collector resistor's resistance in k\u2126 .\n", + "\n", + "#Calculation\n", + "#D.C load line equation : VCE=VCC-IC*RC;\n", + "#Calculating maximum VCE ,by IC=0;\n", + "I_C_Vce_max=0; #Collector current for maximum collector-emitter voltage, in mA\n", + "VCE_max=VCC;-I_C_Vce_max*R_C; #Maximum collector-emitter voltage in V\n", + "\n", + "\n", + "#Calculating maximum collector current IC,by VCE=0;\n", + "V_CE_IC_max=0; #Collector-emitter voltage for maximum collector current, in V \n", + "I_C_max=(VCC-V_CE_IC_max)/R_C; #Maximum collector current in mA\n", + "\n", + "\n", + "#Operating point:\n", + "#For input circuit, applying Kirchhoff's law, We get,\n", + "#VCC=IB*RB + VBE.\n", + "#From the above equation,\n", + "IB=(VCC-VBE)/R_B; #Base current in mA\n", + "IC=beta*IB; #Collector current\n", + "\n", + "#From the output circuit, applying Kirchhoff's law, we get:\n", + "VCE=VCC-IC*R_C; #Collector-emitter voltage in V\n", + "\n", + "\n", + "#Stability factor\n", + "SF=beta+1; \n", + "\n", + "#Result\n", + "print(\"Operating point: VCE= %dV and IC=%d mA\"%(VCE,IC));\n", + "print(\"Stability factor= %d.\"%SF);\n", + "\n", + "\n", + "#plot\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,10])\n", + "limit.set_ylim([0,5])\n", + "VCE=[i for i in range(0,(int)(VCC+1))]; #Plot variable for V_CE\n", + "IC=[((VCC-i)/(R_C)) for i in (VCE[:])]; #Plot variable for I_C\n", + "\n", + "p=plot(VCE,IC);\n", + "xlabel(\"VCE(V)\");\n", + "ylabel(\"IC(mA)\");\n", + "title(\"d.c load line\");\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point: VCE= 4V and IC=1 mA\n", + "Stability factor= 101.\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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+ "text": [ + "<matplotlib.figure.Figure at 0x7f8eea67df10>" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.5: Page number 202" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage in V\n", + "beta=100.0; #base current amplification factor\n", + "I_C_zero_signal=1.0; #zero signal collector current in mA\n", + "VBE=0.3; #Base-emitter voltage of Ge transistor in V\n", + "\n", + "#calculations\n", + "\n", + "#Case(i)\n", + "I_B_zero_signal=I_C_zero_signal/beta; #Zero signal base current in mA\n", + "\n", + "#applying the Kirchhoff's law along input circuit:\n", + "#We get, VCC=IB*RB +VBE\n", + "#From the above equation we get,\n", + "R_B=(VCC-VBE)/I_B_zero_signal; #Required base resistor's resistance in k\u2126\n", + "\n", + "print(\"Value of base resistor for operating the given Ge transistor at zero signal IC=1mA is = %d k\u2126\"%R_B);\n", + "\n", + "\n", + "\n", + "#Case(ii)\n", + "beta=50;\n", + "I_B=(VCC-VBE)/R_B; #Base current of another transistor with beta=50, in mA\n", + "I_C_zero_signal=beta*I_B; #Zero signal collector current for beta=50 , in mA\n", + "\n", + "print(\"The new value of zero signal collector current =%.1fmA\"%I_C_zero_signal);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of base resistor for operating the given Ge transistor at zero signal IC=1mA is = 1170 k\u2126\n", + "The new value of zero signal collector current =0.5mA\n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.6:Page number 202-203" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Varaible declaration\n", + "VCC=10.0; #Collector supply voltage in V\n", + "VBE=0; #Base emitter voltage in V(considering itas zero due to it's small value)\n", + "R_B=1.0; #Base resistor's resistance in M\u2126\n", + "R_C=2.0; #Collector resistor's resistance in k\u2126 \n", + "R_E=1.0; #Emitter resistor's resistance in k\u2126\n", + "beta=100.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "#using Kirchhoff's law in the input circuit, we get:\n", + "#VCC=IB*RB +VBE +IE*RE\n", + "#Since, IE=(beta +1)*I_B\n", + "#From the above equation we get:\n", + "I_B=round((VCC-VBE)/((beta + 1)*R_E + R_B*1000),4); #Base current in mA\n", + "I_C=round(beta*I_B,2); #Collector current in mA\n", + "I_E=I_B+I_C; #Emitter current in mA\n", + "\n", + "#Result\n", + "print(\"Base current =%.4f mA\"%I_B);\n", + "print(\"Collector current =%.2f mA\"%I_C);\n", + "print(\"Emitter current =%.3f mA\"%I_E);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Base current =0.0091 mA\n", + "Collector current =0.91 mA\n", + "Emitter current =0.919 mA\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.7: Page number 203-204" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCE=8.0; #Collector-emitter voltage at operating point in V\n", + "IC=2.0; #Colector current at operating point in mA\n", + "VCC=15.0; #Collector supply voltagein V\n", + "beta=100.0; #base current amplification factor\n", + "VBE=0.6; #base emitter voltage in V\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's law along the output circuit,\n", + "#we get, VCC=VCE+IC*RC.\n", + "#So, from above equation we get:\n", + "RC=(VCC-VCE)/IC; #Collector resistor's resistance in k\u2126 .\n", + "IB=IC/beta; #Base current in mA\n", + "\n", + "#Applying Kirchhoff's law along the input circuit,\n", + "#we get, VCC=IB*RB + VBE\n", + "#So, from the above equation:\n", + "RB=(VCC-VBE)/IB; #Base resistor's resistance in k\u2126 .\n", + "\n", + "\n", + "#Results\n", + "print(\"Collector load =%.1f k\u2126 .\"%RC);\n", + "print(\"Base resistor=%d k\u2126 .\"%RB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector load =3.5 k\u2126 .\n", + "Base resistor=720 k\u2126 .\n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.8: Page number 204" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage in V\n", + "VBE=0.7; #Base-emitter voltage in V\n", + "RB=100.0; #Base resistor's resistance in k\u2126\n", + "RC=560.0; #Collector resistor's resistance in \u2126\n", + "beta_25=100.0; #base current amplification factor at 25 degree celsius\n", + "beta_75=150.0; #base current amplification factor at 25 degree celsius\n", + "\n", + "\n", + "#Calculations\n", + "\n", + "\n", + "#Applying Kirchhoff's law along input circuit, we get\n", + "#VCC=IB*RB+VBE\n", + "IB=(VCC-VBE)/RB; #Base current at 25 degree celsius, in mA\n", + "\n", + "\n", + "#For temperature 25 degree celsius\n", + "IC_25=beta_25*IB; #Collector current at 25 degree celsius, in mA\n", + "\n", + "\n", + "#Applying Kirchhoff's alw at the output circuit,\n", + "#we get: VCC=IC*RC + VCE\n", + "#From the above equation,\n", + "VCE_25=round(VCC-(IC_25/1000)*RC,2); #Collector emitter voltage at 25 degree celsius, in V\n", + "\n", + "\n", + "#For temperature 75 degree celsius\n", + "IC_75=round(beta_75*IB,0); #Collector current at 75 degree celsius, in mA\n", + "\n", + "#Applying Kirchhoff's alw at the output circuit,\n", + "#we get: VCC=IC*RC + VCE\n", + "#From the above equation,\n", + "VCE_75=round(VCC-(IC_75/1000)*RC,2); #Collector emitter voltage at 75 degree celsius, in V\n", + "\n", + "\n", + "change_IC=(IC_75-IC_25)*100.0/IC_25; #percentage change in collector current\n", + "change_VCE=(VCE_75-VCE_25)*100.0/VCE_25; #Percentage change in collector-emitter voltage \n", + "\n", + "#Results\n", + "print(\"The percentage change in collector current =%d%%\"%change_IC);\n", + "print(\"The percentage change in collector-emitter voltage =%.1f%%\"%change_VCE);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The percentage change in collector current =50%\n", + "The percentage change in collector-emitter voltage =-56.3%\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.10: Page number 205" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCE_max=20.0; #Maximum collector-emitter voltage in V\n", + "VBE=0.7; #Base-emitter voltage in V\n", + "IC_max=8.0; #Maximum collector current in mA\n", + "IB=40.0; #Base current in microampere\n", + "\n", + "#Calculations\n", + "\n", + "#During cut off state the collector-emitter voltage is maximum and equal to collector supply voltage\n", + "VCC=VCE_max; #Collector supply voltage in V\n", + "\n", + "#Maximum collector current IC_max=collector supply voltage(VCC)/collector load(RC)\n", + "#Collector load(RC)=VCC*IC_max\n", + "RC=VCC/IC_max; #Collector load in k\u2126 .\n", + "\n", + "#Applying Kirchhoff's law along input circuit,\n", + "#we get, VCC=IB*RB +VBE.\n", + "#From the above equation, we get:\n", + "RB=(VCC-VBE)/(IB/1000); #Base resistor's resistance in k\u2126 .\n", + "\n", + "#Results\n", + "print(\"Collector supply voltage = %dV\"%VCC);\n", + "print(\"Collector load=%.1f k\u2126 .\"%RC);\n", + "print(\"Base resistor's resistance=%.1f k\u2126 .\"%RB);\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector supply voltage = 20V\n", + "Collector load=2.5 k\u2126 .\n", + "Base resistor's resistance=482.5 k\u2126 .\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.12: Page number 208" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage in V\n", + "VEE=-20.0; #Emitter supply voltage in V\n", + "RB=100.0; #Base resistor's resistance in k\u2126\n", + "RC=4.7; #Collector resistor's resistance in k\u2126\n", + "RE=10.0; #Emitter resistor's resistance in k\u2126\n", + "VBE=0.7; #Base-emitter voltage in V\n", + "beta=85.0; #Base current amplification factor\n", + "\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's voltage law along the base-emitter circuit (input circuit),\n", + "#we get,IB*RB +IE*RE +VBE -VEE=0.\n", + "#Since IB=IC/beta and IC~IE,\n", + "#(IE/beta)*RB + IE*RE + VBE + VEE =0.\n", + "IE=(-VEE-VBE)/(RE + RB/beta); #Emitter current in mA\n", + "IC=IE; #Collector current (approximately equal to emitter current) in mA\n", + "\n", + "#Applying Kirchhoff's law from VCC till collector terminal,\n", + "#we get, VCC - IC*RC =VC\n", + "VC=VCC-IC*RC; #voltage at collector terminal in V\n", + "\n", + "#Applying Kirchhoff's law from emitter terminal to VEE\n", + "#we get, VE -IE*RE =VEE\n", + "VE=VEE + IE*RE; #Voltage at emitter treminal in V\n", + "\n", + "VCE=VC-VE; #Collector-emitter voltage in V\n", + "\n", + "#Results\n", + "print(\"The collector current = %.2f mA\"%IC);\n", + "print(\"The emitter current = %.2f mA\"%IE);\n", + "print(\"The voltage at collector terminal = %.1f V\"%VC);\n", + "print(\"The collector-emitter voltage = %.1f V\"%VCE);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The collector current = 1.73 mA\n", + "The emitter current = 1.73 mA\n", + "The voltage at collector terminal = 11.9 V\n", + "The collector-emitter voltage = 14.6 V\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.13: Page number 208-209\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage in V\n", + "VEE=-20.0; #Emitter supply voltage in V\n", + "RB=100.0; #Base resistor's resistance in k\u2126\n", + "RC=4.7; #Collector resistor's resistance in k\u2126\n", + "RE=10.0; #Emitter resistor's resistance in k\u2126\n", + "beta1=85.0; #Base current amplification factor for case 1 \n", + "beta2=100.0; #Base current amplification factor for case 1\n", + "VBE_1=0.7; #Base emitter voltage for case 1 in V\n", + "VBE_2=0.6; #Base emitter voltage for case 2 in V\n", + "\n", + "\n", + "#Calculations\n", + "#For beta=85 and VBE=0.7,\n", + "#As calculated in the previous question,\n", + "IC_1=1.73; #Collector current in mA.\n", + "VCE_1=14.6; #Collector-emitter voltage in V.\n", + "\n", + "\n", + "#For case (ii)\n", + "#beta=100 and VBE=0.6\n", + "\n", + "#Applying Kirchhoff's voltage law along the base-emitter circuit (input circuit),\n", + "#we get,IB*RB +IE*RE +VBE -VEE=0.\n", + "#Since IB=IC/beta and IC~IE,\n", + "#(IE/beta)*RB + IE*RE + VBE +VEE =0.\n", + "IE_2=round((-VEE-VBE_2)/(RE + RB/beta2),2); #Emitter current in mA\n", + "IC_2=IE_2; #Collector current (approximately equal to emitter current) in mA\n", + "\n", + "#Applying Kirchhoff's law from VCC till collector terminal,\n", + "#we get, VCC - IC*RC =VC\n", + "VC=round(VCC-IC_2*RC,1); #voltage at collector terminal in V\n", + "\n", + "#Applying Kirchhoff's law from emitter terminal to VEE\n", + "#we get, VE -IE*RE =VEE\n", + "VE=round(VEE + IE_2*RE,1); #Voltage at emitter treminal in V\n", + "\n", + "VCE_2=VC-VE; #Collector-emitter voltage in V\n", + "\n", + "\n", + "change_IC= (IC_2-IC_1)*100/IC_1; #%age change in collector current\n", + "\n", + "change_VCE=(VCE_2-VCE_1)*100/VCE_2; #%age change in collector-emitter voltage\n", + "\n", + "\n", + "\n", + "#Results\n", + "print(\"Percentage change in collector current =%.1f%%\"%change_IC);\n", + "print(\"Percentage change in collector-emitter voltage =%.1f%%\"%change_VCE);" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Percentage change in collector current =1.7%\n", + "Percentage change in collector-emitter voltage =-3.5%\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.14: Page number 210\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage in V\n", + "VBE=0.7 #Base-emitter voltage in V\n", + "RB=100.0; #Base resistor's resistance in k\u2126\n", + "RC=1.0; #Collector resistor's resistance in k\u2126\n", + "beta=100.0; #base current amplification factor\n", + "\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's law along input circuit,\n", + "#we get, VCC -IC*RC -IB*RB -VBE=0.\n", + "#since IC= beta*IB,\n", + "#We get,\n", + "IB=(VCC-VBE)/(RB + beta*RC); #Base current in mA\n", + "IC=beta*IB; #Collector current in mA\n", + "\n", + "#Applying Kirchhoff's law along the output circuit,\n", + "#we get, VCC-VCE - IC*RC=0.\n", + "#From the above equation,\n", + "VCE=VCC-IC*RC; #Collector emitter voltage in V\n", + "\n", + "\n", + "#Results\n", + "print(\"The operating point : VCE=%.2fV and IC=%.2fmA.\"%(VCE,IC));\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The operating point : VCE=10.35V and IC=9.65mA.\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.15: Page number 210-211\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage in V\n", + "VBE=0.3; #Base emitter voltage in V\n", + "IC=1.0; #Collector current in mA\n", + "VCE=8.0; #Collector emitter voltage in V\n", + "beta=100.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "\n", + "#Case(i)\n", + "\n", + "#Applying Kirchhoff's law along the output circuit,\n", + "#we get, VCC-IC*RC-VCE=0.\n", + "#from the above equation we get,\n", + "RC=(VCC-VCE)/IC; #Collector load in kilo ohm\n", + "IB=IC/beta; #Base current in mA\n", + "\n", + "#Applying Kirchhoff's law along input circuit\n", + "#we get, VCC-VBE-(beta*IB*RC)-IB*RB=0.\n", + "#From the above equation we get,\n", + "RB=round((VCC-VBE-beta*IB*RC)/IB,0); #Base resistor's resistance in k\u2126\n", + "\n", + "#Results\n", + "print(\"The resistance value of base resistor=%d k\u2126 and collector load= %d k\u2126.\"%(RB,RC));\n", + "\n", + "#Case(ii)\n", + "\n", + "beta=50;\n", + "\n", + "#Applying Kirchhoff's law along input circuit,\n", + "#we get, VCC -IC*RC -IB*RB -VBE=0.\n", + "#since IC= beta*IB,\n", + "#We get,\n", + "IB=(VCC-VBE)/(RB + beta*RC); #Base current in mA\n", + "IC=beta*IB; #Collector current in mA\n", + "\n", + "#Applying Kirchhoff's law along the output circuit,\n", + "#we get, VCC-VCE - IC*RC=0.\n", + "#From the above equation,\n", + "VCE=round(VCC-IC*RC,1); #Collector emitter voltage in V\n", + "\n", + "#Results\n", + "print(\"The operating point : VCE=%.1fV and IC=%.1fmA.\"%(VCE,IC));\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The resistance value of base resistor=770 k\u2126 and collector load= 4 k\u2126.\n", + "The operating point : VCE=9.6V and IC=0.6mA.\n" + ] + } + ], + "prompt_number": 23 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.16 : Page number 211" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCE=2.0; #Collector-emitter voltage at operating point in V\n", + "VBE=0.7; #Base-emitter voltage in V \n", + "IC=1.0; #Collector current at operating point in mA\n", + "beta=100.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "IB=IC/beta; #Base current in mA\n", + "\n", + "#As, VCE=VCB +VBE\n", + "#we get,\n", + "VCB=VCE-VBE; #Collector-base voltage in V\n", + "RB=VCB/IB; #Base resistor's resistance in k\u2126\n", + "\n", + "#Results\n", + "print(\"Value of base resistor's resistance=%d k\u2126.\"%RB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of base resistor's resistance=130 k\u2126.\n" + ] + } + ], + "prompt_number": 24 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.17 : Page number 211-212" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage in V\n", + "VBE=0.7 #Base-emitter voltage in V\n", + "RB=400.0; #Base resistor's resistance in k\u2126\n", + "RC=4.0; #Collector resistor's resistance in k\u2126\n", + "RE=1.0; #Emitter resistor's resistance in k\u2126\n", + "beta=100.0; #Base current amplification factor\n", + "\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's law along outut circuit,\n", + "#we get, VCC -(IC+IB)*RC -IB*RB -VBE - IE*RE=0.\n", + "#since IC= beta*IB, IC+IB ~ IC and IE~IC,\n", + "#We get, VCC - IC*RC -(IC/beta)*RB -VBE - IE*RE\n", + "IC=(VCC-VBE)/(RB/beta + RC + RE); #Collector current current in mA.\n", + "IE=IC; #Emitter current in mA\n", + "\n", + "#Applying Kirchhoff's law along the output circuit,\n", + "#we get, VCC-VCE - IC*RC -IE*RE=0. (IE~IC)\n", + "#From the above equation,\n", + "VCE=VCC-IC*(RC+RE); #Collector emitter voltage in V\n", + "\n", + "\n", + "#Results\n", + "print(\"The operating point : VCE=%.1fV and IC=%.2fmA.\"%(VCE,IC));\n", + "\n", + "\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The operating point : VCE=5.7V and IC=1.26mA.\n" + ] + } + ], + "prompt_number": 25 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.18 : Page number 212" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage in V\n", + "RB=100.0; #Base resistor's resistance in k\u2126\n", + "RC=10.0; #Collector resistor's resistance in k\u2126\n", + "RE=0; #Emitter resistor's resistance in k\u2126\n", + "VBE=0.7; #Base-emitter voltage in V\n", + "beta=100.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's law along outut circuit,\n", + "#we get, VCC -(IC+IB)*RC -IB*RB -VBE - IE*RE=0.\n", + "#since IC= beta*IB, IC+IB ~ IC and IE~IC,\n", + "#We get, VCC - IC*RC -(IC/beta)*RB -VBE - IE*RE\n", + "IC=(VCC-VBE)/(RC +RB/beta + RE); #Collector current in mA\n", + "\n", + "#Applying Kirchhoff's law along the output circuit,\n", + "#we get, VCC-VCE - IC*RC =0. (IE~IC)\n", + "#From the above equation,\n", + "VCE=VCC-IC*RC; #Collector-emitter voltage in V\n", + "\n", + "#Results\n", + "print(\"The d.c bias values are: VCE=%.2fV and IC=%.3fmA\"%(VCE,IC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The d.c bias values are: VCE=1.55V and IC=0.845mA\n" + ] + } + ], + "prompt_number": 26 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.19: Page number 214-215\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "import matplotlib.pyplot as plt\n", + "\n", + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage in V\n", + "R1=10.0; #Resistor R1's resistance in k\u2126\n", + "R2=5.0; #Resistor R2's resistance in k\u2126\n", + "RC=1.0; #Collector resistor's resistance in k\u2126 \n", + "RE=2.0; #Emitter resistor's resistance in k\u2126\n", + "VBE=0.7; #Base-emitter voltage in V\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's law along output circuit\n", + "#VCE=VCC-IC*(RC+RE);\n", + "#IC=0, for VCE_max\n", + "VCE_max=VCC; #Maximum collector-emitter voltage in V\n", + "#VCE=0, for IC_max\n", + "IC_max=VCC/(RC+RE); #Maximum collector current in mA\n", + "\n", + "#Operating point\n", + "V2=(VCC*R2)/(R1+R2); #Voltage across R2 resistor V\n", + "IE=(V2-VBE)/RE; #Emitter current in mA\n", + "IC=IE; #Collector current(Approx. equal to emitter current) in mA\n", + "VCE=VCC-IC*(RC+RE); #Collector-emitter voltage in V\n", + "\n", + "#Results\n", + "print(\"Collector-emitter voltage at operating point=%.2fV\"%VCE);\n", + "print(\"Collector current at operating point = %.2fmA\"%IC);\n", + "\n", + "#plot\n", + "limit = plt.gca()\n", + "limit.set_xlim([0,20])\n", + "limit.set_ylim([0,6])\n", + "VCE=[i for i in range(0,(int)(VCC+1))]; #Plot variable for V_CE\n", + "IC=[((VCC-i)/(RC+RE)) for i in (VCE[:])]; #Plot variable for I_C\n", + "\n", + "p=plot(VCE,IC);\n", + "xlabel(\"VCE(V)\");\n", + "ylabel(\"IC(mA)\");\n", + "title(\"d.c load line\");\n", + "show(p);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector-emitter voltage at operating point=8.55V\n", + "Collector current at operating point = 2.15mA\n" + ] + }, + { + "metadata": {}, + "output_type": "display_data", + "png": 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ZKpWKr9l2mj9/Ps6ePYtjx47Bw8MDL7/8stQlWZ2qqirExMRgzZo1cHJyanJf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\nAAAAAElFTkSuQmCC\n", + "text": [ + "<matplotlib.figure.Figure at 0x7f8eeacf1ad0>" + ] + } + ], + "prompt_number": 29 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.20: Page number 215-216\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage in V\n", + "R1=10.0; #Resistor R1's resistance in k\u2126 .\n", + "R2=5.0; #Resistor R2's resistance in k\u2126 .\n", + "RC=1.0; #Collector resistor's resistance in k\u2126 . \n", + "RE=2.0; #Emitter resistor's resistance in k\u2126 .\n", + "VBE=0.7; #Base-emitter voltage in V\n", + "\n", + "#Calculations\n", + "#Using Thevenin's Theorem for replacing circuit consisting of VCC,R1,R2\n", + "E0=(VCC*R2)/(R1+R2); #Thevenin's voltage in V\n", + "R0=(R1*R2)/(R1+R2); #Thevenin's equivalent resistance in k\u2126 .\n", + "\n", + "#Applying Kirchhoff' law along thevenin's equivalent circuit,\n", + "#E0=IB*R0+VBE+IE*RE;\n", + "#Since IE~IC and IC=beta*IB\n", + "#IC=(E0-VBE)/(R0/beta +RE);\n", + "IC=(E0-VBE)/RE; #(Since R0/beta << RE) collector current in mA\n", + "VCE=VCC-IC*(RC+RE); #Collector emitter voltage in V\n", + "\n", + "\n", + "#Results\n", + "print(\"Collector-emitter voltage at operating point=%.2fV\"%VCE);\n", + "print(\"Collector current at operating point = %.2fmA\"%IC);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Collector-emitter voltage at operating point=8.55V\n", + "Collector current at operating point = 2.15mA\n" + ] + } + ], + "prompt_number": 30 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.21: Page number 216-217\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage in V\n", + "RE=1.0; #Emitter resistor, k\u2126 .\n", + "R1=50.0; #Resistor R1, k\u2126 .\n", + "R2=10.0; #Resistor R2, k\u2126 .\n", + "\n", + "\n", + "#Calculations\n", + "\n", + "#(i)\n", + "VBE=0.1; #Base-emitter voltage in V\n", + "V2=(VCC*R2)/(R1+R2); #Voltage drop across resistor R2, V \n", + "IE=(V2-VBE)/RE; #Emitter current in mA\n", + "\n", + "print(\"(i)Emitter current= %.1fmA\"%IE);\n", + "\n", + "#(ii)\n", + "VBE=0.3; #Base-emitter voltage in V\n", + "V2=(VCC*R2)/(R1+R2); #Voltage drop across resistor R2, V\n", + "IE=(V2-VBE)/RE; #Emitter current in mA\n", + "\n", + "print(\"(ii)Emitter current= %.1fmA\"%IE);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i)Emitter current= 1.9mA\n", + "(ii)Emitter current= 1.7mA\n" + ] + } + ], + "prompt_number": 31 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.22: Page number 217\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=20.0; #Collector supply voltage, V\n", + "R1=10.0; #Resistor R1, k\u2126\n", + "R2=10.0; #Resistor R2, k\u2126 .\n", + "RC=1.0; #Collector resistor, k\u2126 .\n", + "RE=5.0; #Emitter resistor, k\u2126 .\n", + "\n", + "\n", + "#Calculations\n", + "V2=(VCC*R2)/(R1+R2); #Voltage drop across resistor R2, V\n", + "\n", + "#Applying kirchhoff's law from base terminal to emitter resistor\n", + "#V2=VBE+IE*RE\n", + "#VBE is neglected due to its small value\n", + "\n", + "IE=V2/RE; #Emitter current in mA\n", + "IC=IE; #Collector current (approx. equal to emitter current), mA\n", + "\n", + "#Applying Kirchhoff's law along output circuit\n", + "VCE=VCC-IC*(RC+RE); #Collector-emitter voltage , V\n", + "VC=VCC-IC*RC; #Voltage at collector terminal,V\n", + "\n", + "\n", + "#Results\n", + "print(\"Emitter current =%dmA\"%IE);\n", + "print(\"Collector-emitter voltage=%dV\"%VCE);\n", + "print(\"Collector terminal's voltage=%dV\"%VC);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Emitter current =2mA\n", + "Collector-emitter voltage=8V\n", + "Collector terminal's voltage=18V\n" + ] + } + ], + "prompt_number": 32 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.23: Page number 219-220\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "VCC=12.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=50; #Base current amplification factor\n", + "R1=150; #Resistor R1, k\u2126 .\n", + "R2=100; #Resistor R2, k\u2126 .\n", + "RC=4.7; #Collector resistor, k\u2126 .\n", + "RE=2.2; #Emitter resistor, k\u2126 .\n", + "\n", + "#Calculations\n", + "#Using Thevenin's theorem, calculating Thevenin's voltage and resistance\n", + "E0=(VCC*R2)/(R1+R2); #Thevenin's voltage, V\n", + "R0=(R1*R2)/(R1+R2); #Thevenin's resistance, k\u2126 .\n", + "\n", + "#Applying Kirchhoff' law along thevenin's equivalent circuit,\n", + "#E0=IB*R0+VBE+IE*RE;\n", + "#Since IE~IC and IC=beta*IB\n", + "IB=round((E0-VBE)/(R0+beta*RE),3); #Base current in mA\n", + "IC=round(beta*IB,1); #Collector current, mA\n", + "\n", + "#Applying Kirchhoff's law along the output circuit\n", + "VCE=VCC-IC*(RC+RE); #Collector-emitter voltage, V\n", + "\n", + "S=(beta+1)*(1+R0/RE)/(beta +1+R0/RE); #Stability factor\n", + "\n", + "\n", + "#Results\n", + "print(\"Operating point : VCE= %.2fV and IC=%.1fmA\"%(VCE,IC));\n", + "print(\"Stability factor=%.1f\"%S);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point : VCE= 3.72V and IC=1.2mA\n", + "Stability factor=18.4\n" + ] + } + ], + "prompt_number": 33 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.24 : Page number 220\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage , V\n", + "beta=100.0; #Base current amplification factor\n", + "R1=6.0; #Resistor R1, k\u2126 .\n", + "R2=3.0; #Resistor R2, k\u2126 .\n", + "RC=470.0; #Collector resistor, \u2126.\n", + "RE=1.0; #Emitter resistor, k\u2126 .\n", + "\n", + "#Calculations\n", + "#Using Thevenin's theorem, calculating Thevenin's voltage and resistance\n", + "E0=(VCC*R2)/(R1+R2); #Thevenin's voltage, V\n", + "R0=(R1*R2)/(R1+R2); #Thevenin's resistance, k\u2126 .\n", + "\n", + "#Applying Kirchhoff' law along thevenin's equivalent circuit,\n", + "#E0=IB*R0+VBE+IE*RE;\n", + "#Since IE~IC and IC=beta*IB\n", + "IB=round((E0-VBE)/(R0+beta*RE),3); #Base current in mA\n", + "IC=round(beta*IB,1); #Collector current, mA\n", + "\n", + "#Applying Kirchhoff's law along the output circuit\n", + "VCE=VCC-IC*(RC/1000+RE); #Collector-emitter voltage, V\n", + "\n", + "S=(beta+1)*(1+R0/RE)/(beta +1+R0/RE); #Stability factor\n", + "\n", + "#Results\n", + "print(\"Operating point : VCE= %.2fV and IC=%.1fmA\"%(VCE,IC));\n", + "print(\"Stability factor=%.2f\"%S);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point : VCE= 8.83V and IC=4.2mA\n", + "Stability factor=2.94\n" + ] + } + ], + "prompt_number": 36 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.25 : Page number 221-222\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Varaible declaration\n", + "VCC=9; #Collector supply voltage, V\n", + "VCE=3; #Collector-emitter voltage, V\n", + "VBE=0.3; #Base-emitter voltage in V\n", + "RC=2.2; #Collector resistor , k\u2126 .\n", + "IC=2; #Collector current, mA\n", + "beta=50.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "IB=IC/beta; #Base current in mA\n", + "\n", + "#According to given relation, I1=10*IB\n", + "I1=IB*10; #Current through the resistor R1, mA\n", + "\n", + "#I1=VCC/(R1+R2), .'s LAW\n", + "R1_R2_sum=VCC/I1; #Sum of the resistor's R1 and R2, k\u2126 (OHM'S LAW).\n", + "\n", + "#Applying Kirchhoff's law along the output circuit\n", + "#VCC=IC*RC+VCE+IE*RE\n", + "#IC~IE\n", + "RE=(VCC-IC*RC-VCE)/IC; #Emitter resistor, k\u2126 .\n", + "RE=round(RE*1000,0); #Emittter resistor, \u2126 .\n", + "\n", + "IE=IC; #Emittter current(approximately equal to collector current), mA\n", + "VE=IE*(RE/1000); #Voltage at emitter terminal (OHM's LAW), V\n", + "V2=VBE+VE; #Voltage drop across resistor R2, V\n", + "\n", + "R2=V2/I1; #Resistor R2,(OHM's LAW), k\u2126 .\n", + "R1=R1_R2_sum-R2; #Resistor R1, k\u2126 .\n", + "\n", + "\n", + "\n", + "#Results\n", + "print(\"RE=%d \u2126., R1=%.2f k\u2126 . and R2=%.2f k\u2126 .\"%(RE,R1,R2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "RE=800 \u2126., R1=17.75 k\u2126 . and R2=4.75 k\u2126 .\n" + ] + } + ], + "prompt_number": 38 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.26 : Page number 222\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=16.0; #Collector supply voltage, V\n", + "R2=20.0; #Resistor R2, k\u2126\n", + "RE=2.0; #Emitter resistor, k\u2126\n", + "VCE=6.0; #Collector-emitter voltage, V\n", + "IC=2.0; #Collector current , mA\n", + "VBE=0.3; #Base-emitter voltage,V\n", + "alpha=0.985; #Current amplification factor\n", + "\n", + "#Calculations\n", + "beta=alpha/(1-alpha); #Base current amplificatioon factor\n", + "IE=IC; #Emitter current, mA\n", + "IB=IC/beta; #Base current, mA\n", + "VE=IE*RE; #Emitter voltage,(OHM's LAW) V\n", + "V2=VBE+VE; #Voltage drop across resistor R2,(Kirchhoff's law) V\n", + "V_R1=VCC-V2; #Voltage drop across resistor R1, V\n", + "I1=V2/R2; #Current through resistor R2 an R1,(OHM's LAW) mA\n", + "R1=V_R1/I1; #Resistor R1,(OHM's LAW) k\u2126\n", + "\n", + "V_RC=(VCC-VCE-VE); #Voltage across collector resistor, V\n", + "RC=V_RC/IC; #Collector resistor,(OHM's LAW) k\u2126\n", + "\n", + "\n", + "#Results\n", + "print(\"R1=%.1f k\u2126 and RC=%d k\u2126.\"%(R1,RC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "R1=54.4 k\u2126 and RC=3 k\u2126.\n" + ] + } + ], + "prompt_number": 37 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.27 :Page number 222-223\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=15.0; #Collector supply voltage, V\n", + "R1=10.0; #Resistor R1, k\u2126 \n", + "R2=5.0; #Resistor R2, k\u2126 \n", + "RC=1.0; #Collector resistor, k\u2126 \u007f\n", + "RE=2.0; #Emitter resistor, k\u2126 \n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=100; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "#Using Thevenin's theorem, calculating Thevenin's voltage and resistance\n", + "E0=(VCC*R2)/(R1+R2); #Thevenin's voltage, V\n", + "R0=(R1*R2)/(R1+R2); #Thevenin's resistance, k\u2126 \n", + "\n", + "#Applying Kirchhoff' law along Thevenin's equivalent circuit,\n", + "#E0=IB*R0+VBE+IE*RE;\n", + "#Since IE~IC and IB=IE/beta,\n", + "IE=(E0-VBE)/(R0/beta + RE); #Emitter current , mA\n", + "\n", + "\n", + "#Calculations\n", + "print(\"The exact value of emitter current in the circuit = %.2fmA.\"%IE);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The exact value of emitter current in the circuit = 2.11mA.\n" + ] + } + ], + "prompt_number": 40 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 2.28: Page number 223-224\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "\n", + "#Variable declaration\n", + "IE=2.0; #Emitter current, mA\n", + "IB=50.0; #Base current, mA\n", + "VCC=10.0; #Collector supply voltage, V\n", + "VBE=0.2; #Base-emitter voltage, V\n", + "R2=10.0; #Resistor R2, k\u2126\n", + "RE=1.0; #Emitter resistance, k\u2126\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's law from the base to the emitter resistor,\n", + "V2=VBE+IE*RE; #Voltage at base terminal, V\n", + "I2=V2/R2; #Current through the resistor R2, mA\n", + "I1=I2+IB/1000; #Current through the resistor R2, mA\n", + "V1=VCC-V2; #Voltage drop across the resistor R2\n", + "R1=V1/I1; #Resistor R1, k\u2126\n", + "\n", + "\n", + "#Results\n", + "print(\"The value of the resistor R1=%.2f k\u2126.\"%R1);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The value of the resistor R1=28.89 k\u2126.\n" + ] + } + ], + "prompt_number": 41 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.30 :Page number 225-226\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=8.0; #Collector supply voltage, V\n", + "RB=360.0; #Base resistor, k\u2126\n", + "RC=2.0; #Collector resistor, k\u2126\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=100.0; #base current amplification factor\n", + "\n", + "\n", + "#Calculations\n", + "IC_max=VCC/RC; #Maximum collector current, mA\n", + "VCE_max=VCC; #Maximum collector voltage, V\n", + "\n", + "#Operating point\n", + "#Applying Kirchhoff's law along the input circuit\n", + "IB=(VCC-VBE)/RB; #Base current, mA\n", + "IC=beta*IB; #Collector current, mA\n", + "\n", + "#Kirchhoff' law along the output circuit\n", + "VCE=VCC-IC*RC; #Collector-emitter voltage, V\n", + "\n", + "#Results\n", + "print(\"VCE=%.2fV, is approximately half of VCC=%dV \\n therefore it is mid-point biased.\"%(VCE,VCC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "VCE=3.94V, is approximately half of VCC=8V \n", + " therefore it is mid-point biased.\n" + ] + } + ], + "prompt_number": 42 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.31: page number 226\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=50.0; #Base current amplification factor\n", + "R1=12.0; #Resistor R1, k\u2126 \n", + "R2=2.7; #Resistor R2, k\u2126 \n", + "RC=620.0; #Collector resistor, \u2126 \n", + "RE=180.0; #Emitter resistor, \u2126\n", + "\n", + "\n", + "#Calculations\n", + "#Voltage divder rule across R1 and R2\n", + "V2=round((VCC*R2)/(R1+R2),2); #Voltage drop across resistor R2, V\n", + "IE=round(((V2-VBE)/RE)*1000,2); #Emitter current, mA\n", + "IC=IE; #Collector current(Approximately equal to emitter current), mA\n", + "print(\"IC~IE=%.2fmA.\"%IC);\n", + "\n", + "#Applying Kirchhoff's law along the output circuit\n", + "VCE=VCC-(IC/1000)*(RC+RE); #Collector-emitter voltage, V\n", + "\n", + "#Results\n", + "print(\"VCE=%.2fV, is approximately half of VCC=%dV \\n therefore it is mid-point biased.\"%(VCE,VCC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "IC~IE=6.33mA.\n", + "VCE=4.94V, is approximately half of VCC=10V \n", + " therefore it is mid-point biased.\n" + ] + } + ], + "prompt_number": 49 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.32 : Page number 227\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "\n", + "#Variable declaration\n", + "VCC=10.0; #Collector supply voltage, V\n", + "IC=10.0; #Collector current, mA \n", + "VBE=0.7; #Base-emitter voltage, V\n", + "R1=1.5; #Resistor R1, k\u2126 \n", + "R2=680.0; #Resistor R2, \u2126 \n", + "RC=260.0; #Collector resistor, \u2126 \n", + "RE=240.0; #Emitter resistor, \u2126 \n", + "beta_min=100; #Minimum value of base current amplification factor\n", + "beta_max=400; #Maximum value of base current amplification factor\n", + "\n", + "#Calculations\n", + "#Voltage divder rule across R1 and R2\n", + "V2=round((VCC*R2/1000)/(R1+R2/1000),2); #Voltage drop across resistor R2, V\n", + "IE=round((V2-VBE)/(RE/1000),0); #OHM' LAW, Emitter current, mA\n", + "IC=IE; #Collector current(approx. equal to emitter current),mA\n", + "beta_avg=sqrt(beta_min*beta_max); #Average value of base current amplification factor\n", + "IB=IE/(beta_avg +1); #Base current, mA\n", + "IB=IB*1000; #Base current, \ud835\udf07A\n", + "\n", + "#Results\n", + "print(\"Base current= %.2f \ud835\udf07A\"%IB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Base current= 49.75 \ud835\udf07A\n" + ] + } + ], + "prompt_number": 51 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.33 : Page number 227-228\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VEE=12.0; #Emitter supply voltage, V\n", + "RC=1.5; #Collector resistor, k\u2126\n", + "RB=120.0; #Base resistor k\u2126\n", + "RE=510.0; #Emitter resistor, \u2126 \n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=60.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's voltage law,\n", + "#IB*RB - VBE - IE*RE +VEE=0\n", + "#Since IE~IC and IC=beta*IB,\n", + "IB=(VEE-VBE)/(RB + beta*RE/1000); #Base current , mA\n", + "IC=round(beta*IB,1); #Collector current, mA\n", + "\n", + "#Applying Kirchhoff's voltage law along output circuit,\n", + "VCE=VEE-IC*(RC + RE/1000); #Collector-emitter voltage, V\n", + "\n", + "\n", + "#Results\n", + "print(\"Operating point : VCE= %.2fV and IC=%.1fmA.\"%(VCE,IC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point : VCE= 2.96V and IC=4.5mA.\n" + ] + } + ], + "prompt_number": 60 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.34 : Page number 228-229\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import floor\n", + "\n", + "#Variable declaration\n", + "VEE=9.0; #Emitter supply voltage, V\n", + "RC=1.2; #Collector resistor, k\u2126\n", + "RB=100.0; #Base resistor ,k\u2126\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "beta=45.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "#Applying Kirchhoff's voltage law,\n", + "#IB*RB + VBE=VEE\n", + "#Since IE~IC and IC=beta*IB,\n", + "IB=round((VEE-VBE)/RB,3); #Base current , mA\n", + "IC=floor(beta*IB*100)/100; #Collector current, mA\n", + "\n", + "#Applying Kirchhoff's voltage law along output circuit,\n", + "VCE=VEE-IC*RC; #Collector-emitter voltage, V\n", + "\n", + "#Results\n", + "print(\"Operating point : VCE= %.2fV and IC=%.2fmA.\"%(VCE,IC));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Operating point : VCE= 4.52V and IC=3.73mA.\n" + ] + } + ], + "prompt_number": 68 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.35 : Page number 229\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "VCC=16.0; #Collector supply voltage, V\n", + "VBE=0.7; #Base-emitter voltage, V\n", + "IC=1.0; #Collector current, mA\n", + "VCE=6.0; #Collector-emitter voltage, V\n", + "beta=150.0; #Base current amplification factor\n", + "\n", + "#Calculations\n", + "#For a good design, VE=VCC/10;\n", + "VE=VCC/10; #Emitter terminal's voltage, V\n", + "#OHM's Law\n", + "#And, taking IE~IC\n", + "RE=VE/IC; #Emitter resistor, k\u2126\n", + "\n", + "#Applying Kirchhoff's voltage law alog output circuit:\n", + "#VCC=IC*RC + VCE + VE\n", + "RC=(VCC-VCE-VE)/IC; #Collector resistor, k\u2126\n", + "V2=VE+VBE; #Voltage drop across resistor R2,V\n", + "#From the relation I1=10*IB\n", + "R2=(beta*RE)/10; #Resistor R2, kilo ohm\n", + "\n", + "#From voltage divider rule across R1 and R2,\n", + "#V2=(VCC*R2)/(R1+R2)\n", + "R1=(VCC-V2)*R2/V2; #Resistor R1, k\u2126 \n", + "\n", + "#Results\n", + "print(\"RE=%.1f k\u2126 , RC=%.1f k\u2126, R1=%.0f k\u2126 and R2=%d k\u2126.\"%(RE,RC,R1,R2));\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "RE=1.6 k\u2126 , RC=8.4 k\u2126, R1=143 k\u2126 and R2=24 k\u2126.\n" + ] + } + ], + "prompt_number": 69 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.36 : Page number 230-231\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "ICBO=5.0; #Collector to base leakage current, microampere\n", + "beta=40.0; #Base current amplification factor\n", + "IC_zero_signal=2.0; #Zero signal collector current, mA\n", + "op_temp=25.0; #operating temperature, degree celsius\n", + "temp_risen=55.0; #Temperature risen, degree celsius\n", + "temp_ICBO_doubles=10.0; #Temperature after which ICBO doubles, degree celsius\n", + "\n", + "#Calculations\n", + "\n", + "#(i)\n", + "ICEO=(beta+1)*ICBO; #Collector to emitter leakage current, microampere\n", + "\n", + "#(ii)\n", + "Number_of_times_ICBO_doubled=(temp_risen - op_temp)/temp_ICBO_doubles; #Number of times ICBO doubles\n", + "ICBO_final=ICBO*2**Number_of_times_ICBO_doubled; #Final value of collector to base leakage current, microampere\n", + "ICEO_final=ICBO_final*(beta + 1); #Final value of collector to emitter leakage current, microampere\n", + "\n", + "IC_zero_signal_55=(ICEO_final/1000) +IC_zero_signal; #Zero signal collector current at 55 degree celius\n", + "change=(IC_zero_signal_55-IC_zero_signal)*100/IC_zero_signal; #Percentage change in zero signal collector current\n", + "\n", + "#Result\n", + "print(\"(i) The percentage change in the zero signal collector current=%.0f%%. \"%change)\n", + "\n", + "#(iii)\n", + "#For the silicon transistor\n", + "ICBO=0.1; #Collector to base leakage current, microampere\n", + "\n", + "ICEO=(beta+1)*ICBO; #Collector to emitter leakage current, microampere\n", + "\n", + "Number_of_times_ICBO_doubled=(temp_risen - op_temp)/temp_ICBO_doubles; #Number of times ICBO doubles\n", + "ICBO_final=ICBO*2**Number_of_times_ICBO_doubled; #Final value of collector to base leakage current, microampere\n", + "ICEO_final=ICBO_final*(beta + 1); #Final value of collector to emitter leakage current, microampere\n", + "\n", + "IC_zero_signal_55=(ICEO_final/1000) +IC_zero_signal; #Zero signal collector current at 55 degree celius\n", + "change=(IC_zero_signal_55-IC_zero_signal)*100/IC_zero_signal; #Percentage change in zero signal collector current\n", + "\n", + "\n", + "#Result\n", + "print(\"(ii) The percentage change in the zero signal collector current=%.1f%%. \"%change)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) The percentage change in the zero signal collector current=82%. \n", + "(ii) The percentage change in the zero signal collector current=1.6%. \n" + ] + } + ], + "prompt_number": 70 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example 9.37 : Page number 231\n" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Variable declaration\n", + "ICBO=0.02 #Collector to base leakage current, \ud835\udf07A\n", + "alpha=0.99; #Current amplification factor\n", + "IE=1.0; #Emitter current, mA\n", + "op_temp=27.0; #operating temperature, degree celsius\n", + "temp_risen=57.0; #Temperature risen, degree celsius\n", + "temp_ICBO_doubles=6.0; #Temperature after which ICBO doubles, degree celsius\n", + "\n", + "#Calculations\n", + "Number_of_times_ICBO_doubled=(temp_risen - op_temp)/temp_ICBO_doubles; #Number of times ICBO doubles\n", + "ICBO_55=ICBO*2**Number_of_times_ICBO_doubled; #collector to base leakage current at 55 degree celsius, \ud835\udf07A\n", + "IC=alpha*IE + ICBO_55/1000; #Collector current, mA\n", + "IB=IE-IC; #Base current, mA\n", + "IB=IB*1000; #Base current,\ud835\udf07A\n", + "\n", + "#Results\n", + "print(\"Base current at 57 degree celsius=%.1f \ud835\udf07A \"%IB);\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Base current at 57 degree celsius=9.4 \ud835\udf07A \n" + ] + } + ], + "prompt_number": 71 + }, + { + "cell_type": "code", + "collapsed": false, + "input": [], + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
\ No newline at end of file diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter10_ac_load_line_1.png b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter10_ac_load_line_1.png Binary files differnew file mode 100644 index 00000000..d7feffd7 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter10_ac_load_line_1.png diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter18_clipping_ckt_output_1.png b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter18_clipping_ckt_output_1.png Binary files differnew file mode 100644 index 00000000..76486c7b --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter18_clipping_ckt_output_1.png diff --git a/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter8_dc_load_line_1.png b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter8_dc_load_line_1.png Binary files differnew file mode 100644 index 00000000..9b26fbe2 --- /dev/null +++ b/Principles_of_Electronics_____by_V.K._Mehta_and_Rohit_Mehta/screenshots/chapter8_dc_load_line_1.png diff --git a/Problems_in_Electrical_Engineering_by_Parker_Smith/Chapter1.ipynb b/Problems_in_Electrical_Engineering_by_Parker_Smith/Chapter1.ipynb new file mode 100644 index 00000000..566ba120 --- /dev/null +++ b/Problems_in_Electrical_Engineering_by_Parker_Smith/Chapter1.ipynb @@ -0,0 +1,3260 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Appendix - Solved problems" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 2 Page 340" + ] + }, + { + "cell_type": "code", + "execution_count": 49, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Voltage Gradients :\n", + " for A : 1622 V/cm\n", + " for B : 1216 V/cm\n", + " for C : 811 V/cm\n", + "\n", + "Energy stored :\n", + " for A : 21.9 uJ\n", + " for B : 41.1 uJ\n", + " for C : 38.3 uJ\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "# Given\n", + "t1=2# # mm \n", + "t2=5# # mm \n", + "t3=7# # mm \n", + "eps1=3 # dielectric constant\n", + "eps2=4 # dielectric constant\n", + "eps3=6# # dielectric constant\n", + "eps0=1/36/pi*10**-9# # dielectric constant\n", + "d=10/100 # m\n", + "V=1500 # V \n", + "#E1*t1+E2*t2+E3*t3=V\n", + "#Voltage Gradients : \n", + "# using eps1*E1=eps2*E2=eps3*E3\n", + "E1=V/(t1+(eps1/eps2)*t2+(eps1/eps3)*t3)# V/mm \n", + "E1=E1*10 # V/cm\n", + "E2=eps1*E1/eps2 # V/cm\n", + "E3=eps1*E1/eps3 # V/cm\n", + "print \"Voltage Gradients :\\n for A : %.f V/cm\\n for B : %.f V/cm\\n for C : %.f V/cm\"%(E1,E2,E3)\n", + "\n", + "A = pi*d**2\n", + "W1=1/2*eps0*eps1*E1**2*10**4*A*t1*10**-3# # J\n", + "W2=1/2*eps0*eps2*E2**2*10**4*A*t2*10**-3# # J\n", + "W3=1/2*eps0*eps3*E3**2*10**4*A*t3*10**-3# # J\n", + "W1=W1*10**6 # # uJ\n", + "W2=W2*10**6 # # uJ\n", + "W3=W3*10**6 # # uJ\n", + "print \"\\nEnergy stored :\\n for A : %.1f uJ\\n for B : %.1f uJ\\n for C : %.1f uJ\"%(W1,W2,W3)\n", + "\n", + "\n", + "# Answer in the textbook are not accurate" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 3 Page 341" + ] + }, + { + "cell_type": "code", + "execution_count": 50, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Current required = 1.95 A\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "\n", + "# Given\n", + "N=680# # turns\n", + "fi=1.6*10**3 # Wb\n", + "d1=4/100 # m\n", + "d2=24/100 # m\n", + "l=0.6 # m\n", + "mu0=4*pi/10**7 # constant\n", + "\n", + "\n", + "# For air gap : \n", + "A=d1**2 # m**2\n", + "Bg=fi/A # weber/m**2\n", + "Hg=Bg/mu0 # AT/m\n", + "mmf1=0.001/mu0 # AT\n", + "\n", + "# For central limb : \n", + "A=d1**2 # m**2\n", + "Bc=fi/A # weber/m**2\n", + "Hc=900 # AT/m (from magnetization curve)\n", + "mmf2=Hc*d2 # AT\n", + "\n", + "\n", + "# For side limb : \n", + "fi=1/2*fi # Wb\n", + "A=d1**2 # m**2\n", + "Bc=fi/A # weber/m**2\n", + "Hc=520 # AT/m (from magnetization curve)\n", + "mmf3=Hc*l # AT\n", + "\n", + "mmf_total = mmf1+mmf2+mmf3 # AT\n", + "i=mmf_total/N # A\n", + "print \"Current required = %0.2f A\"%(i)\n", + "\n", + "\n", + "# Answer in the textbook are not accurate" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 4 Page 343" + ] + }, + { + "cell_type": "code", + "execution_count": 51, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\t\t\tWithout air gap With air gap\n", + "\n", + "Exciting current 3.75 A 11.7 A\n", + "\n", + "Inductance 5.3 mH 1.7 mH\n", + "\n", + "Stored Energy 0.375 J 1.17 J\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "\n", + "# Given\n", + "\n", + "D=15/100 # m\n", + "A=10/10**-4 # m**2\n", + "N=200# # turns\n", + "fi=1.6*10**3 # Wb\n", + "B=1 # weber/m**2\n", + "mu0=4*pi/10**7 # constant\n", + "mur=500 # constant\n", + "lg=2/1000 # m\n", + "\n", + "\n", + "# without air gap\n", + "l=pi*D # m\n", + "R=l/mu0/mur/A # A/Wb\n", + "fi=B*A # Wb\n", + "mmf=fi*R # AT\n", + "I=mmf/N # A\n", + "L=N**2/R/10**6 # mH\n", + "E=1/2*L*I**2/100 # J\n", + "\n", + "\n", + "# with air gap\n", + "Rg=lg/mu0/A # A/Wb\n", + "Rt=R+Rg # A/Wb\n", + "fi=B*A # Wb\n", + "mmf=fi*Rt # AT\n", + "I2=mmf/N # A\n", + "L2=N**2/Rt/10**6 # mH\n", + "E2=1/2*L2*I2**2/100 # J\n", + "\n", + "print \"\\t\\t\\tWithout air gap With air gap\"\n", + "print \"\\nExciting current %.2f A %.1f A\"%(I,I2)\n", + "print \"\\nInductance %.1f mH %.1f mH\"%(L,L2)\n", + "print \"\\nStored Energy %.3f J %.2f J\"%(E,E2)\n", + "\n", + "\n", + "# Answer in the textbook are not accurate" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 5 Page 344" + ] + }, + { + "cell_type": "code", + "execution_count": 52, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Voltage acroos 100 ohm = -72.0 V\n", + "\n", + "R=37.5 ohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import array\n", + "\n", + "# Given\n", + "\n", + "VA=60 # V\n", + "I=0.6 # A\n", + "# (VB-VA)/20+(VB-VC)/20+VB/20-I=0\n", + "#3*VB-VC=72 for node B eqn(1)\n", + "#(VC-VA)/50+(VC-VB)/30+(VC-12)/50+VC/100=0\n", + "#-5*VB+10*VC=144 eqn(2)\n", + "A=array([[3, -1],[-5 ,10]])\n", + "B=array([[72],[144]])\n", + "X=A**-1*B#\n", + "VB=X[0,0] # V\n", + "VC=X[0,1] # V\n", + "print \"Voltage acroos 100 ohm = %.1f V\"%(VC)\n", + "VC=24 # V\n", + "VB=(72+VC)/3 # from eqn(1)\n", + "# Node C \n", + "# (VC-VA)/50+(VC-VB)/20+(VC-12)/50+VC/100+VC/R=0 eqn(3)\n", + "R=100*VC/(144+5*VB-10*VC) # ohm\n", + "print \"\\nR=%.1f ohm\"%(R)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 6 Page 346" + ] + }, + { + "cell_type": "code", + "execution_count": 53, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "\n", + "at f = 2.34 kHz, the above filter will have required attenuation.\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,cosh\n", + "\n", + "# Given\n", + "\n", + "Ro=600 # ohm\n", + "fc=2*1000 # Hz\n", + "alfa=10 # dB\n", + "\n", + "\n", + "L=Ro/pi/fc*1000 # mH\n", + "C=1/(pi*Ro*fc)*10**6 # uF\n", + "alfa=alfa/8.686 # nepers\n", + "f=fc*cosh(alfa/2)/1000 # kHz\n", + "print \"\\nat f = %.2f kHz, the above filter will have required attenuation.\"%(f)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 7 Page 347" + ] + }, + { + "cell_type": "code", + "execution_count": 54, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "equation for instant current:\n", + "i=2.13*sin(314*t+1.01)\n", + "Power consumed = 56.6 W\n", + "Voltage across capacitor = 73.3 V(+ve & -ve)\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,atan,sqrt,asin,sin\n", + "\n", + "# Given\n", + "#v=100*sin(314*t)\n", + "R=25 # ohm\n", + "C=80 # uF\n", + "omega=314 # radian\n", + "Vm=100 # V\n", + "\n", + "Xc=1/omega/(C*10**-6) # ohm\n", + "Z=sqrt(R**2+Xc**2) # ohm\n", + "Im=Vm/Z # A\n", + "theta=atan(Xc/R) # radian\n", + "print \"equation for instant current:\"\n", + "print \"i=%.2f*sin(%d*t+%.2f)\"%(Im,omega,theta)\n", + "P=(Im/sqrt(2))**2*R # W\n", + "print \"Power consumed = %.1f W\"%(P)\n", + "Vcm=Im*Xc # V \n", + "#(when i=Im/2)\n", + "i=0.5*Im # A\n", + "#vc=Vcm*sin(314*t+theta-pi/2)\n", + "#i=Im*sin(314*t+theta)\n", + "tt=asin(i/Im) # radian tt=314*t+theta\n", + "vcm=Vcm*sin(tt-pi/2)\n", + "print \"Voltage across capacitor = %.1f V(+ve & -ve)\"%(abs(vcm))" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 8 Page 348" + ] + }, + { + "cell_type": "code", + "execution_count": 55, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Capacitance of XC = 318 uF\n", + "Circuit current = 10 A and power = 1 kW\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import pi,roots\n", + "\n", + "# Given\n", + "\n", + "Z1=(6.25+1J*1.25) # ohm\n", + "Z2=(5+1J*0) # ohm\n", + "#Z3=(5-1J*XC) # ohm\n", + "V=100 # V\n", + "f=50 # Hz\n", + "#Z23=(250+5*Xc**2)/(100+Xc**2)-1J*(25*Xc)/(100+Xc**2)\n", + "#for in phase condition imag part must be zero\n", + "#5*Xc**2-100*Xc+5*100=0\n", + "A=[5 ,-100, 500] # polynomal \n", + "XC=roots(A)#\n", + "XC=XC[0] # ohm\n", + "C=1/(2*pi*f*XC)*10**6 # uF\n", + "print \"Capacitance of XC = %.f uF\"%(C)\n", + "Z=XC # ohm\n", + "I=V/Z # A\n", + "P=I**2*Z/1000 # kW\n", + "print \"Circuit current = %.f A and power = %.f kW\"%(I,P)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 9 Page 349" + ] + }, + { + "cell_type": "code", + "execution_count": 56, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "L = 10.4 mH\n", + " C=267 uF\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "\n", + "# Given\n", + "\n", + "omega_o=600 # rad/s\n", + "omega=400 # rad/s\n", + "R=3 # ohm\n", + "IBYIo=1/2 # ratio\n", + "\n", + "\n", + "fo=omega_o/2/pi # Hz\n", + "f=omega/2/pi # Hz\n", + "#I/Io=1/(sqrt(1+Q**2*(f/fo-fo/f)**2))\n", + "Q=sqrt(1/IBYIo**2-1)/(fo/f-f/fo)\n", + "#Q=1/omega_0/R/C\n", + "C=1/omega_o/R/Q*10**6 # uF\n", + "#Q=omega_0*L/R\n", + "L=Q*R/omega_o*1000 # mH\n", + "print \"L = %.1f mH\\n C=%.f uF\"%(L,C)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 10 Page 350" + ] + }, + { + "cell_type": "code", + "execution_count": 57, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Star Connection : P=1.6 kW\n", + "Delta Connection : P=4.8 kW\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt\n", + "\n", + "# Given\n", + "\n", + "V=400 # V\n", + "f=50 # Hz\n", + "n=3 # no of phase\n", + "R=100 # ohm\n", + "\n", + "#Star connection\n", + "Vph=V/sqrt(n) # V\n", + "Iph=Vph/R # A\n", + "IL=Iph # A\n", + "cos_fi=1 # for only resitor load\n", + "P=sqrt(3)*V*IL*cos_fi/1000 # kW\n", + "print \"Star Connection : P=%.1f kW\"%(P)\n", + "#Delta Connection\n", + "\n", + "Vph=V # V\n", + "Iph=Vph/R # A\n", + "IL=sqrt(3)*Iph # A\n", + "VL=Vph # V\n", + "P=sqrt(3)*VL*IL*cos_fi/1000 # kW\n", + "print \"Delta Connection : P=%.1f kW\"%(P)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 11 Page 351" + ] + }, + { + "cell_type": "code", + "execution_count": 58, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Phase Current:\n", + "Iab=10 angle=-53.13 degree \n", + "Ibc=10 angle=-156.87 degree \n", + "Ica=20 angle=156.87 degree \n", + "\n", + "\n", + " Line Current:\n", + "Iaa=29 angle=-33.03 degree \n", + "Ibb=10 angle=165.00 degree \n", + "Icc=15 angle=127.97 degree \n", + "\n", + "\n", + " Total Power, W=3 kW\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import exp,pi\n", + "import cmath as cm\n", + "# Given\n", + "Rab=6;Rbc=8;Rca=4 # ohm\n", + "Vab=100*exp(1J*0) # V\n", + "Vbc=100*exp(1J*-120*pi/180) # V\n", + "Vca=100*exp(1J*120*pi/180) # V\n", + "Zab=6+1J*8 # ohm\n", + "Zbc=8+1J*6 # ohm\n", + "Zca=4-1J*3 # ohm\n", + "\n", + "#Phase current\n", + "Iab=Vab/Zab # A\n", + "Ibc=Vbc/Zbc # A\n", + "Ica=Vca/Zca # A\n", + "print \"Phase Current:\"\n", + "print \"Iab=%.f angle=%.2f degree \"%(abs(Iab),cm.phase(Iab)*180/pi)\n", + "print \"Ibc=%.f angle=%.2f degree \"%(abs(Ibc),cm.phase(Ibc)*180/pi)\n", + "print \"Ica=%.f angle=%.2f degree \"%(abs(Ica),cm.phase(Ica)*180/pi)\n", + "#Line current\n", + "Iaa=Iab-Ica # A\n", + "Ibb=Ibc-Iab # A\n", + "Icc=Ica-Ibc # A\n", + "print \"\\n\\n Line Current:\"\n", + "print \"Iaa=%.f angle=%.2f degree \"%(abs(Iaa),cm.phase(Iaa)*180/pi)\n", + "print \"Ibb=%.f angle=%.2f degree \"%(abs(Iab),cm.phase(Ibb)*180/pi)\n", + "print \"Icc=%.f angle=%.2f degree \"%(abs(Icc),cm.phase(Icc)*180/pi)\n", + "#Power Consumed\n", + "Wab=abs(Iab)**2*Rab # W\n", + "Wbc=abs(Ibc)**2*Rbc # W\n", + "Wca=abs(Ica)**2*Rca # W\n", + "W=Wab+Wbc+Wca # W\n", + "W=W/1000 # kW\n", + "print \"\\n\\n Total Power, W=%.f kW\"%(W)\n", + "#Answer wrong for line current in the textbook." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 12 Page 353" + ] + }, + { + "cell_type": "code", + "execution_count": 59, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Wattmeter W1 reading=0 W\n", + "Wattmeter W2 reading=8000 W or 8 kW\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import exp,pi\n", + "import cmath as cm\n", + "\n", + "# Given\n", + "VRY=200*exp(1J*0) # V\n", + "VYB=200*exp(1J*-120*pi/180) # V\n", + "VBR=200*exp(1J*120*pi/180) # V\n", + "\n", + "\n", + "ZA=10*exp(1J*60*pi/180) # ohm\n", + "ZB=10*exp(1J*0*pi/180) # ohm\n", + "ZC=10*exp(1J*60*pi/180) # ohm\n", + "\n", + "#Phase current\n", + "IRY=VRY/ZA # A\n", + "IYB=VYB/ZB # A\n", + "IBR=VBR/ZC # A\n", + "\n", + "IR=IRY-IBR # A\n", + "PVA=(VRY).conjugate()*IR # W\n", + "print \"Wattmeter W1 reading=%.f W\"%((PVA.real))\n", + "IB=IBR-IYB # A\n", + "PVB=(-VYB).conjugate()*IB # W\n", + "print \"Wattmeter W2 reading=%.f W or %.f kW\"%((PVB.real),(PVB.real)/1000)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 13 Page 354" + ] + }, + { + "cell_type": "code", + "execution_count": 60, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "expression for current:\n", + "i = 9.83*sin(omega*t--38.1)+1.0*sin(3*omega*t-7.0)+0.25*sin(5*omega*t-74.3)\n", + "Irms=7 A\n", + " Vrms=181 V\n", + "Total Power, P=977 W\n", + "Power factor = 0.77\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import exp,pi,sqrt\n", + "import cmath as cm\n", + "# Given\n", + "#v=250*sin(omega*t)+50*sin(3*omega*t+pi/3)+20*sin(5*omega*t+5*pi/6)\n", + "V1=250;V3=50;V5=20 # V\n", + "fi1=0;fi3=60;fi5=150 # degree\n", + "R=20 # omh\n", + "L=0.05 # H\n", + "omega=314 # rad/s\n", + "\n", + "X1=omega*L # ohm\n", + "Z1=R+1J*X1 # ohm\n", + "X3=3*omega*L # ohm\n", + "Z3=R+1J*X3 # ohm\n", + "X5=5*omega*L # ohm\n", + "Z5=R+1J*X5 # ohm\n", + "r1=abs(Z1);t1=cm.phase(Z1)\n", + "r3=abs(Z3);t3=cm.phase(Z3)\n", + "r5=abs(Z5);t5=cm.phase(Z5)\n", + "print \"expression for current:\"\n", + "print \"i = %.2f*sin(omega*t-%.1f)+%.1f*sin(3*omega*t%.1f)+%.2f*sin(5*omega*t-%.1f)\"%(V1/r1,fi1-t1*180/pi,V3/r3,fi3-t3*180/pi,V5/r5,fi5-t5*180/pi)\n", + "\n", + "I1m=V1/r1 # A\n", + "I3m=V3/r3 # A\n", + "I5m=V5/r5 # A\n", + "Irms=sqrt(I1m**2/2+I3m**2/2+I5m**2/2) # A\n", + "Vrms=sqrt(V1**2/2+V3**2/2+V5**2/2) # A\n", + "print \"Irms=%.f A\\n Vrms=%.f V\"%(Irms,Vrms)\n", + "P=Irms**2*R # W\n", + "print \"Total Power, P=%.f W\"%(P)\n", + "cosfi=P/Vrms/Irms # Power factor\n", + "print \"Power factor = %.2f\"%(cosfi)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 14 Page 355" + ] + }, + { + "cell_type": "code", + "execution_count": 61, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "expression for current:\n", + "i = 12.1*sin(314*t-1.263)+0.95*e**(-100*t)\n", + "current after 0.02 sec is : -11.4 A\n", + "transient component is : 1.56 A\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,exp,sin,atan\n", + "\n", + "# Given\n", + "f=50 # Hz\n", + "Vm=400 # V\n", + "R=10 # ohm\n", + "L=0.1 # H\n", + "t=0.02 # sec\n", + "XL=2*pi*f*L # ohm\n", + "Z=R+1J*XL # ohm\n", + "Im=Vm/abs(Z) # A\n", + "fi=atan(XL/R) # degree\n", + "lamda=L/R # sec\n", + "print \"expression for current:\"\n", + "print \"i = %.1f*sin(314*t-%.3f)+0.95*e**(-100*t)\"%(Im,fi)\n", + "i = Im*sin(314*t-fi)+0.95*exp(-100*t) # A\n", + "print \"current after 0.02 sec is : %0.1f A\"%(i)\n", + "i2=Im*(0.95*exp(-100*t)) # A\n", + "print \"transient component is : %0.2f A\"%(i2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 15 Page 356" + ] + }, + { + "cell_type": "code", + "execution_count": 62, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Since R<2sqrt(L/C), the circuit is originally oscillatory.\n", + "Expression for current :\n", + " i = 0.000*exp(-50t)*sin(312.2t)\n", + "\n", + "\n", + " Additional resistance required = 1064 ohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt,asin,exp,sin\n", + "from sympy import Symbol,solve\n", + "from scipy.misc import derivative\n", + "\n", + "# Given\n", + "C=5*10**-6 # F\n", + "L=2 # H\n", + "R=200 # ohm\n", + "\n", + "if R<2*sqrt(L/C):\n", + " print \"Since R<2sqrt(L/C), the circuit is originally oscillatory.\"\n", + "\n", + "\n", + "a=R/2/L\n", + "omega = sqrt(1/L/C-R**2/4/L**2) # rad/s\n", + "#i=Im*exp(-a*t)*sin(omega*t+fi)\n", + "#at t=0 sec\n", + "i0=0 # A\n", + "vc=10 # V\n", + "fi=asin(i0) # degree\n", + "#L*di/dt=vc at t=0\n", + "Im=Symbol('Im')\n", + "def current(t):\n", + " i=Im*exp(-a*t)*sin(omega*t+fi)\n", + " return i\n", + "#i=Im*expm(-a*t)*sin(omega*t+fi)\n", + "\n", + "\n", + "LdiBYdt=L*derivative(current,0)\n", + "#temp = coeff(LdiBYdt)\n", + "Im=solve(LdiBYdt,Im)[0]\n", + "#vc/temp(2)\n", + "print \"Expression for current :\\n i = %.3f*exp(-%dt)*sin(%.1ft)\"%(Im,a,omega)\n", + "Rn=2*sqrt(L/C) # ohm\n", + "Rad=Rn-R # ohm\n", + "print \"\\n\\n Additional resistance required = %d ohm\"%(Rad)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 16 Page 357" + ] + }, + { + "cell_type": "code", + "execution_count": 63, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Reading of hot wire instrument = 0.548 A\n", + "Reading of electrostatic voltmeter acroos 1000 ohm = 547 V\n", + "Reading of electrostatic voltmeter acroos 1 mH inductor = 353 V\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt\n", + "\n", + "# Given\n", + "#i=0.5+0.3*sin(omega*t)-0.2*sin(2*omega*t)\n", + "I0=0.5;I1m=0.3;I2m=-0.2 # from above expression\n", + "Iav=I0 # A\n", + "R=1000 # ohm\n", + "L=1/1000 # H\n", + "\n", + "Irms=sqrt(I0**2+(I1m/sqrt(2)**2+(I2m/sqrt(2)**2))) # A\n", + "print \"Reading of hot wire instrument = %.3f A\"%(Irms)\n", + "VR=Irms*R # V\n", + "print \"Reading of electrostatic voltmeter acroos 1000 ohm = %d V\"%(VR)\n", + "#vl_dash=L*di/dt=300*cos(w*t)-400*cos(2*w*t)\n", + "vl1=300;vl2=4 # V\n", + "vl=sqrt((300/sqrt(2))**2+(400/sqrt(2))**2)\n", + "print \"Reading of electrostatic voltmeter acroos 1 mH inductor = %d V\"%(vl)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 17 Page 358" + ] + }, + { + "cell_type": "code", + "execution_count": 64, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "The limit of error = 48.6 uV\n", + "Deflection = 8.2 mm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "R=80 # ohm\n", + "V=2 # V\n", + "l=50 # cm\n", + "vd=.1 # V\n", + "emf=1.43 # V\n", + "Rc=850 # ohm\n", + "sg=17.5 # mm/uA\n", + "df=1 # mm\n", + "\n", + "\n", + "I=R/V # A\n", + "Rw=vd/I # ohm (Resistance of side wire)\n", + "Id=df/sg*10**-6 # A (current for 1mm deflection)\n", + "el=1/sg*Rc # uV\n", + "print \"The limit of error = %.1f uV\"%(el)\n", + "Rw1=0.2/l*Rw # ohm (for 2cm slide wire)\n", + "dV=I*Rw1*1000 # mV (Change in voltage from null point)\n", + "r1=emf/I # ohm (tapped portion) \n", + "r2=r1*22.8/R # ohm\n", + "Ig=dV/1000/(Rc+r2) # A\n", + "d=dV/1000/(Rc+r2)/Id # mm\n", + "print \"Deflection = %.1f mm\"%(d)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 18 Page 359" + ] + }, + { + "cell_type": "code", + "execution_count": 65, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "reading of hot wire ammeter = 0.56 A\n", + "reading of moving coil ammeter = 0.30 A\n", + "\n", + "\n", + " Power taken from the mains = 83.3 W\n", + "Power dissipated in rectifying device = 67 W\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt\n", + "from sympy.mpmath import quad\n", + "\n", + "# Given\n", + "R=50 # ohm\n", + "Vrms=100 # V\n", + "Rd1=50 # ohm\n", + "Rd2=100 # ohm \n", + "\n", + "Vm=Vrms/sqrt(2) # V\n", + "#v=Vm*sin(theta)\n", + "Rf=R+Rd1 # ohm\n", + "Rb=R+Rd2 # ohm\n", + "#i_f=v/Rf # A\n", + "#i_b=v/Rb # A\n", + "Irms=1/2/pi*(quad(lambda theta:(sqrt(2)*sin(theta))**2,[0,pi])+quad(lambda theta:(sqrt(2)/3*sin(theta))**2,[pi,2*pi]))\n", + "Iav=1/2/pi*(quad(lambda theta:sqrt(2)*sin(theta),[0,pi])+quad(lambda theta:sqrt(2)/3*sin(theta),[pi,2*pi]))\n", + "print \"reading of hot wire ammeter = %.2f A\"%(Irms)\n", + "print \"reading of moving coil ammeter = %.2f A\"%(Iav)\n", + "P=1/2*(Vrms**2/Rf+Vrms**2/Rb) # W\n", + "print \"\\n\\n Power taken from the mains = %.1f W\"%(P)\n", + "Pc=Irms**2*R # W\n", + "Pd=P-Pc # W\n", + "print \"Power dissipated in rectifying device = %d W\"%(Pd)\n", + "#Answer wrong in the textbook." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 19 Page 361" + ] + }, + { + "cell_type": "code", + "execution_count": 66, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Required potential difference = 500 V\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt,sin\n", + "\n", + "# Given\n", + "d=1/100 # m\n", + "S=-1/100 # m\n", + "Ve=2 # kV\n", + "theta=30 # degree\n", + "e=1.6*10**-19 # C\n", + "m=9.67*10**-31 # kg\n", + "\n", + "u=sqrt(2*e*Ve*1000/m) # m/s\n", + "uy=u*sin(pi/180*theta) # m/s\n", + "vy=0 # since final velocity =0\n", + "#vy**2-uy**2=2*ay*S\n", + "ay=(vy**2-uy**2)/2/S # m**2/s\n", + "#ay=e/m*V/d\n", + "V=ay*m*d/e # V\n", + "print \"Required potential difference = %.f V\"%(V)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 20 Page 361" + ] + }, + { + "cell_type": "code", + "execution_count": 67, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Amplification factor, mu = -40\n", + "Mutual conductance, gm = 2.74 S\n", + "Plate resistance, ra = 14.6 kohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "#Ia=0.0004*(Va+40*Vg)**(3/2) # mA --eqn(1)\n", + "Va=250 # V\n", + "Vg=-3 # V\n", + "#mu=delVa/delVg\n", + "#differenciation wrt Vg eqn(1)\n", + "#(4*10**-6*3/2*(Va+40*Vg))**(1/2)*(mu+40)=0\n", + "mu=-40 # constant\n", + "print \"Amplification factor, mu = %.f\"%(mu)\n", + "#differenciation wrt Va eqn(1)\n", + "#delIa/delVa=(4*10**-6*3/2*(Va+40*Vg))**(1/2)*(0+40)\n", + "gm=(4*10**-6*3/2)*(Va+40*Vg)**(1/2)*(0+40)*1000 # mA/V or S\n", + "print \"Mutual conductance, gm = %.2f S\"%(gm)\n", + "#differenciation wrt Ia eqn(1) keeping Vg constant\n", + "#1=(4*10**-6)*3/2*(Va+40*Vg)**(1/2)*(delVa/delIa+0)\n", + "#ra=delVa/delIa\n", + "ra=1/((4*10**-6)*3/2*(Va+40*Vg)**(1/2))\n", + "print \"Plate resistance, ra = %.1f kohm\"%(ra/1000)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 21 Page 363" + ] + }, + { + "cell_type": "code", + "execution_count": 68, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "General equation of FM wave is:\n", + "v=4*sin(1.57e+08*t+25*sin(2513*t)\n", + "\n", + "\n", + " General equation of PM wave is:\n", + "v=4*sin(1.57e+08*t+25*sin(2513*t)\n", + "\n", + "\n", + " Now equation of FM wave is:\n", + "v=4*sin(1.57e+08*t+25*sin(12566*t)\n", + "\n", + "\n", + " Now equation of PM wave is:\n", + "v=4*sin(1.57e+08*t+25*sin(12566*t)\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "\n", + "# Given\n", + "fc=25*10**6 # Hz\n", + "fm=400 # Hz\n", + "Vm=4 # V\n", + "Del=10*10**3 # Hz\n", + "wc=2*pi*fc # rad/s\n", + "wm=2*pi*fm # rad/s\n", + "m=Del/fm # modulation index\n", + "mf=m;mp=m # modulation index\n", + "print \"General equation of FM wave is:\"\n", + "print \"v=%d*sin(%.2e*t+%d*sin(%d*t)\"%(Vm,wc,mf,wm)\n", + "print \"\\n\\n General equation of PM wave is:\"\n", + "print \"v=%d*sin(%.2e*t+%d*sin(%d*t)\"%(Vm,wc,mp,wm)\n", + "# Changing modulating frequency\n", + "fm_new=2*10**3 # Hz\n", + "a=fm_new/fm # increase in angular frequency\n", + "print \"\\n\\n Now equation of FM wave is:\"\n", + "print \"v=%d*sin(%.2e*t+%d*sin(%d*t)\"%(Vm,wc,mf,a*wm)\n", + "print \"\\n\\n Now equation of PM wave is:\"\n", + "print \"v=%d*sin(%.2e*t+%d*sin(%d*t)\"%(Vm,wc,mp,a*wm)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 22 Page 363" + ] + }, + { + "cell_type": "code", + "execution_count": 69, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "modulation index = 0.5\n", + "carrier power under modulated condition = 5.06 kW\n", + "plate circuit efficiency = 75 percent\n", + "plate dissipation under unmodulated condition = 1.5 kW\n", + "plate dissipation under modulated condition = 1.69 kW\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "Ebb=300 # V\n", + "Ibb=20 # A\n", + "Emm=150 # V\n", + "Po=4.5*10**3 # W\n", + "\n", + "m=Emm/Ebb # modulation index\n", + "Pbb=Ebb*Ibb\n", + "eta=Po/Pbb*100 # %\n", + "P=Po*(1+m**2/2) # W\n", + "Pdo=Pbb-Po # W\n", + "Pd=Pdo*(1+m**2/2) # W\n", + "print \"modulation index = %.1f\"%(m)\n", + "print \"carrier power under modulated condition = %0.2f kW\"%(P/1000)\n", + "print \"plate circuit efficiency = %.f percent\"%(eta)\n", + "print \"plate dissipation under unmodulated condition = %.1f kW\"%(Pdo/1000)\n", + "print \"plate dissipation under modulated condition = %.2f kW\"%(Pd/1000)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 23 Page 364" + ] + }, + { + "cell_type": "code", + "execution_count": 70, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Series equivalent circuit:\n", + "Rs = 77.7 ohm\n", + "Xs = 34.3 ohm\n", + "\n", + "\n", + " Parallel equivalent circuit:\n", + "Rp = 92.8 ohm\n", + "Xp = 211 ohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import cos,pi,sin\n", + "# Given\n", + "Zo=50 # ohm\n", + "VSWR=2 # ratio\n", + "#lm=0.2*lamda\n", + "lmBYlamda=0.2\n", + "betaINTOlamda=2*pi\n", + "rho=(VSWR-1)/(VSWR+1) # reflection coefficient\n", + "theta=2*betaINTOlamda*lmBYlamda # radian\n", + "#exp(j*theta)=cos(theta)+1J*sin(theta)\n", + "ZL=Zo*(1-rho*(cos(theta)+1J*sin(theta)))/(1+rho*(cos(theta)+1J*sin(theta))) # ohm\n", + "Rs=(ZL.real) # ohm\n", + "Xs=abs((ZL.imag)) # ohm(capacitive)\n", + "print \"Series equivalent circuit:\"\n", + "print \"Rs = %0.1f ohm\"%(Rs)\n", + "print \"Xs = %0.1f ohm\"%(Xs)\n", + "YL=(1/ZL)*1000 # mS\n", + "Rp=1000/(YL.real) # ohm\n", + "Xp=1000/(YL.imag) # ohm\n", + "print \"\\n\\n Parallel equivalent circuit:\"\n", + "print \"Rp = %0.1f ohm\"%(Rp)\n", + "print \"Xp = %0.f ohm\"%(Xp)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 24 Page 366" + ] + }, + { + "cell_type": "code", + "execution_count": 71, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "For TE10 mode:\n", + "cutoff wavelength = 9 cm\n", + "guide wavelength = 3.59 cm\n", + "Group velocity = 2.8e+08 m/s\n", + "Phase velocity = 3.2e+08 m/s\n", + "Characteristic wave impedence = 406 ohm\n", + "\n", + "\n", + " For TM11 mode:\n", + "cutoff wavelength = 5 cm\n", + "guide wavelength = 4.48 cm\n", + "Group velocity = 2.2e+08 m/s\n", + "Phase velocity = 4.0e+08 m/s\n", + "Characteristic wave impedence = 281 ohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt\n", + "\n", + "# Given\n", + "b=3 # cm\n", + "a=4.5 # cm\n", + "f=9*10**9 # Hz\n", + "v=3*10**10 # cm/s\n", + "lamda=v/f # cm\n", + "\n", + "print \"For TE10 mode:\"\n", + "m=1 # for TE10 mode\n", + "lamda_c = 2*a/m # cm\n", + "rho=sqrt(1-(lamda/lamda_c)**2)\n", + "lamda_g=lamda/rho # cm\n", + "vg=rho*v # cm/s\n", + "vp=v/rho # cm/s\n", + "ZTE=120*pi/rho # ohm\n", + "\n", + "print \"cutoff wavelength = %.f cm\"%(lamda_c)\n", + "print \"guide wavelength = %.2f cm\"%(lamda_g)\n", + "print \"Group velocity = %.1e m/s\"%(vg/100)\n", + "print \"Phase velocity = %.1e m/s\"%(vp/100)\n", + "print \"Characteristic wave impedence = %.f ohm\"%(ZTE)\n", + "\n", + "print \"\\n\\n For TM11 mode:\"\n", + "m=1;n=1# for TE10 mode\n", + "lamda_c = 2/sqrt((m/a)**2+(n/b)**2) # cm\n", + "rho=sqrt(1-(lamda/lamda_c)**2)\n", + "lamda_g=lamda/rho # cm\n", + "vg=rho*v # cm/s\n", + "vp=v/rho # cm/s\n", + "ZTM=120*pi*rho # ohm\n", + "print \"cutoff wavelength = %.f cm\"%(lamda_c)\n", + "print \"guide wavelength = %.2f cm\"%(lamda_g)\n", + "print \"Group velocity = %.1e m/s\"%(vg/100)\n", + "print \"Phase velocity = %.1e m/s\"%(vp/100)\n", + "print \"Characteristic wave impedence = %.f ohm\"%(ZTM)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 25 Page 367" + ] + }, + { + "cell_type": "code", + "execution_count": 72, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "part(a):\n", + "For fo>fs, the range of fo : 965 to 2065 kHz\n", + "frequency ratio = 2.14\n", + "capacitance ratio = 4.58\n", + "\n", + "\n", + " part(b):\n", + "For fo>fs, the range of fo : 35 to 1135 kHz\n", + "frequency ratio = 32.4\n", + "capacitance ratio = 1051.6\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "fs_max=1600 # kHz\n", + "fs_min=500 # kHz\n", + "IF=465 # kHz\n", + "\n", + "fr=fs_max/fs_min # ratio\n", + "C_ratio = fr**2 # Cs_max/Cs_min\n", + "#Part (a)\n", + "fo_min=IF+fs_min # kHz\n", + "fo_max=IF+fs_max # kHz\n", + "fr_o=fo_max/fo_min # frequency ratio for oscillator\n", + "C_ratio_o = fr_o**2 # Cs_max/Cs_min\n", + "print \"part(a):\"\n", + "print \"For fo>fs, the range of fo : %.f to %.f kHz\"%(fo_min,fo_max)\n", + "print \"frequency ratio = %.2f\"%(fr_o)\n", + "print \"capacitance ratio = %.2f\"%(C_ratio_o)\n", + "\n", + "#Part (b)\n", + "fo_min=-IF+fs_min # kHz\n", + "fo_max=-IF+fs_max # kHz\n", + "fr_o=fo_max/fo_min # frequency ratio for oscillator\n", + "C_ratio_o = fr_o**2 # Cs_max/Cs_min\n", + "print \"\\n\\n part(b):\"\n", + "print \"For fo>fs, the range of fo : %.f to %.f kHz\"%(fo_min,fo_max)\n", + "print \"frequency ratio = %.1f\"%(fr_o)\n", + "print \"capacitance ratio = %.1f\"%(C_ratio_o)\n", + "#ans wrong for part b in the book." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 26 Page 368" + ] + }, + { + "cell_type": "code", + "execution_count": 73, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Resistor values are : \n", + "RL=1.60 kohm\n", + "Re=0.40 kohm\n", + "R1=55.60 kohm\n", + "R2=9.34 kohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "Ic=3 # mA\n", + "hfe=45 # unitless\n", + "Vcc=12 # V\n", + "VBE=0.5 # V\n", + "S=0.05 # stability factor\n", + "Beta=45 # unitless\n", + "\n", + "RR=Vcc/2/(Ic*10**-3) # ohm (let RL+Re=RR)\n", + "#Re=20% of (Re+Rl)\n", + "Re=RR*20/100 # ohm\n", + "RL=RR-Re # ohm\n", + "Ve=(Ic+Ic/Beta)*10**-3*Re # V\n", + "Vb=Ve+VBE # V\n", + "#S=Re/Rb=0.5 => Rb=Re/S\n", + "R1=Vcc*Re/S/Vb/1000 # kohm\n", + "# Vb/Vcc = R2/(R2+R1)\n", + "R2=Vb*R1/(Vcc-Vb) # kohm\n", + "print \"Resistor values are : \"\n", + "print \"RL=%.2f kohm\"%(RL/1000)\n", + "print \"Re=%.2f kohm\"%(Re/1000)\n", + "print \"R1=%.2f kohm\"%(R1)\n", + "print \"R2=%.2f kohm\"%(R2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 27 Page 369" + ] + }, + { + "cell_type": "code", + "execution_count": 74, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "load presented by transformer = 11.8 ohm\n", + "load power output = 67.6 W\n", + "conversion efficiency = 62.8 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "\n", + "# Given\n", + "Vcc=50 # V\n", + "Vmin=10 # V\n", + "Pd=40 # W\n", + "\n", + "\n", + "Vo=Vcc-Vmin # V\n", + "K=Vo/Vcc # constant\n", + "Rdash=2*Vcc**2/pi/Pd*(K-pi*K**2/4) # ohm\n", + "Po=K**2*Vcc**2/2/Rdash # W\n", + "eta=pi*K/4*100 # %\n", + "\n", + "print \"load presented by transformer = %.1f ohm\"%(Rdash)\n", + "print \"load power output = %.1f W\"%(Po)\n", + "print \"conversion efficiency = %.1f percent\"%(eta)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 28 Page 370" + ] + }, + { + "cell_type": "code", + "execution_count": 75, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "for 2nd stage(CC stage)\n", + "current gain = 48.57\n", + "Input impedence = 97.14 kohm\n", + "Voltage gain = 1.00\n", + "\n", + "\n", + " for 1st stage(CE stage)\n", + "current gain = -47.66\n", + "Input impedence = 1.08 kohm\n", + "Voltage gain = -86.76\n", + "Output impedence = 68.57 kohm\n", + "Output impedence taking Rc1 into account = 1.94 kohm\n", + "\n", + "\n", + " for overall amplifier\n", + "Output impedence = 34.81 ohm\n", + "Output impedence taking Re2 into account = 33.65 ohm\n", + "current gain = -46.70\n", + "Voltage gain = -86.76\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "Rs=1000 # ohm\n", + "Rc1=2*1000 # ohm\n", + "Re2=2*1000 # ohm\n", + "#CE configuration\n", + "hie=1100 # ohm\n", + "hre=2.5*10**-4#\n", + "hfe=50#\n", + "hoe=25*10**-6 # s\n", + "#CC configuration\n", + "hic=1.1 # kohm\n", + "hrc=1#\n", + "hfc=-51#\n", + "hoc=25*10**-6 # s\n", + "\n", + "print \"for 2nd stage(CC stage)\"\n", + "AI2=-hfc/(1+hoe*Re2) # current gain\n", + "Ri2=hic+hrc*AI2*Re2 # kohm\n", + "Av2=AI2*Re2/Ri2 # Voltage Gain\n", + "print \"current gain = %0.2f\"%(AI2)\n", + "print \"Input impedence = %0.2f kohm\"%(Ri2/1000)\n", + "print \"Voltage gain = %0.2f\"%(Av2)\n", + "\n", + "print \"\\n\\n for 1st stage(CE stage)\"\n", + "RL1=Rc1*Ri2/(Rc1+Ri2) # kohm\n", + "AI1=-hfe/(1+hoe*RL1) # current gain\n", + "print \"current gain = %.2f\"%(AI1)\n", + "Ri1=hie+hre*AI1*RL1 # kohm\n", + "print \"Input impedence = %0.2f kohm\"%(Ri1/1000)\n", + "Av1=AI1*RL1/Ri1 # Voltage gain\n", + "print \"Voltage gain = %0.2f\"%(Av1)\n", + "Ro1=1/(hoe-hfe*hre/(hie+100)) # ohm\n", + "print \"Output impedence = %.2f kohm\"%(Ro1/1000)\n", + "Ro1dash=Ro1*Rc1/(Ro1+Rc1) # /ohm\n", + "print \"Output impedence taking Rc1 into account = %.2f kohm\"%(Ro1dash/1000)\n", + "\n", + "print \"\\n\\n for overall amplifier\"\n", + "Ro=1/(hoc*100-hfc*hrc/(hic+Ro1dash)) # ohm\n", + "print \"Output impedence = %.2f ohm\"%(Ro)\n", + "Rodash=Ro*Re2*1000/(Ro1+Re2*1000) # /ohm\n", + "print \"Output impedence taking Re2 into account = %.2f ohm\"%(Rodash)\n", + "AI=AI1*AI2*Rc1/(Ri2+Rc1) # current gain\n", + "print \"current gain = %.2f\"%(AI)\n", + "Av=Av1*Av2 # voltage gain\n", + "print \"Voltage gain = %.2f\"%(Av)\n", + "#answer is wrong for overall amplifier in the book." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 29 Page 372" + ] + }, + { + "cell_type": "code", + "execution_count": 76, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Voltage gain upper BW frequency = 0.37 MHz\n", + "Current gain = -13.51\n", + "Voltage gain = -27.03\n", + "Voltage gain BW product = 9.90 MHz\n", + "Current gain BW product = 4.95 MHz\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "\n", + "# Given\n", + "fT=6*10**6 # Hz\n", + "hfe=50#\n", + "Rs=500 # ohm\n", + "gm=0.04 # S\n", + "rbb_dash=100 # ohm\n", + "Cc=10*10**-12 # F\n", + "RL=1 # kohm\n", + "\n", + "rbe=hfe/gm # ohm\n", + "Ce=gm/2/pi/fT # F\n", + "C=Ce+Cc*(1+gm*RL) # F\n", + "hie=rbb_dash+rbe # ohm\n", + "R=(Rs+rbb_dash)*rbe/((Rs+rbb_dash)+rbe) # ohm\n", + "f2=1/2/pi/R/C # Hz\n", + "print \"Voltage gain upper BW frequency = %.2f MHz\"%(f2/10**6)\n", + "AIS=-hfe*Rs/(Rs+hie) # current gain\n", + "print \"Current gain = %.2f\"%(AIS)\n", + "AVS=-hfe*RL*1000/(Rs+hie) # voltage gain\n", + "print \"Voltage gain = %.2f\"%(AVS)\n", + "AVSf2=AVS*f2 # Hz\n", + "print \"Voltage gain BW product = %.2f MHz\"%(abs(AVSf2/10**6))\n", + "AISf2=AIS*f2 # Hz\n", + "print \"Current gain BW product = %.2f MHz\"%(abs(AISf2/10**6))\n", + "\n", + "#answer in the textbook are wrong." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 30 Page 373" + ] + }, + { + "cell_type": "code", + "execution_count": 77, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "VGS=0.05 V\n", + "gm = -13.23 mS\n", + "Rs = -49 ohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt\n", + "\n", + "# Given\n", + "VP=-2 # V\n", + "IDSS=1.75/1000 # A\n", + "VDD=24 # V\n", + "ID=1/1000 # A\n", + "VP=0.2 # V (pinch off voltage)\n", + "\n", + "VGS=(1-sqrt(ID/IDSS))*VP # V\n", + "gmo=-2*IDSS/VP # S\n", + "gm=gmo*(1-VGS/VP) # S\n", + "Rs=-VGS/ID # ohm\n", + "\n", + "print \"VGS=%.2f V\"%(VGS)\n", + "print \"gm = %.2f mS\"%(gm*1000)\n", + "print \"Rs = %.f ohm\"%(Rs)\n", + "#Ans are wrong in the book." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 31 Page 374" + ] + }, + { + "cell_type": "code", + "execution_count": 78, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Bandwidth of redesigned aplifier, BW=101 kHz\n" + ] + } + ], + "source": [ + "from math import sqrt\n", + "from __future__ import division\n", + "# Given\n", + "G=37 # dB\n", + "f1=50 # Hz\n", + "f2=18.7*1000 # Hz\n", + "BW1=f2 # Hz (f2-f1~=f2)\n", + "\n", + "\n", + "A1=10**(G/20) # Gain\n", + "A3=sqrt(A1) # Gain\n", + "RL1BYRL2=A1/A3 # ratio\n", + "RL2BYRL1=A3/A1 # ratio\n", + "#BW=2*pi*Cd*RL\n", + "BW1BYBW2=RL2BYRL1#\n", + "BW2BYBW1=RL1BYRL2#\n", + "f2dash=f2*sqrt(sqrt(2)-1)#\n", + "BW2=BW2BYBW1*f2dash # Hz\n", + "print \"Bandwidth of redesigned aplifier, BW=%.f kHz\"%(BW2/1000)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 32 Page 375" + ] + }, + { + "cell_type": "code", + "execution_count": 79, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "ripple factor = 0.4 percent\n", + "Critical inductance, Lc=8.5 H\n" + ] + } + ], + "source": [ + "from math import sqrt\n", + "from __future__ import division\n", + "\n", + "# Given\n", + "L=30 # H\n", + "C=10*10**-6 # F\n", + "RL=8*10**3 # ohm\n", + "f=50 # Hz\n", + "\n", + "r=sqrt(2)/12/(2*pi*f)**2/L/C*100 # %\n", + "Lc=2*RL/6/(2*pi*f) # H\n", + "print \"ripple factor = %.1f percent\"%(r)\n", + "print \"Critical inductance, Lc=%.1f H\"%(Lc)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 33 Page 376" + ] + }, + { + "cell_type": "code", + "execution_count": 80, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Current supplied by the main generator = 7000 A\n", + "Current supplied on +ve side = 6000 A\n", + "Current supplied on -ve side = 8000 A\n", + "out-off balance Current = 2000 A\n", + "Current in each armature = 1000 A\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "# Given\n", + "V=500 # V\n", + "Pp=1500*10**3 # W (+ve side)\n", + "Pn=2000*10**3 # W (-ve side)\n", + "\n", + "P=Pp+Pn # W\n", + "I=P/V # A\n", + "Ip=Pp/(V/2) # A\n", + "In=Pn/(V/2) # A\n", + "Iob=In-Ip # A\n", + "Ia=Iob/2 # A\n", + "print \"Current supplied by the main generator = %.f A\"%(I)\n", + "print \"Current supplied on +ve side = %.f A\"%(Ip)\n", + "print \"Current supplied on -ve side = %.f A\"%(In)\n", + "print \"out-off balance Current = %.f A\"%(Iob)\n", + "print \"Current in each armature = %.f A\"%(Ia)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 34 Page 377" + ] + }, + { + "cell_type": "code", + "execution_count": 81, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "regulation = 17 percent\n", + "Efficiency = 94 percent\n", + "\n", + "\n", + " regulation = 13.4 percent\n", + "Efficiency = 96 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "l=20 # km\n", + "P=10000 # kW\n", + "V=11 # kV\n", + "pf=0.707 # lagging\n", + "R=0.02 # ohm/km/phase\n", + "X=0.07 # ohm/km/phase\n", + "\n", + "#for pf = 0.707\n", + "\n", + "IL=P*10**3/sqrt(3)/(V*1000)/pf # A\n", + "VRphase=V*1000/sqrt(3) # V\n", + "R_phase=l*R # ohm\n", + "X_phase=l*X # ohm\n", + "Z_phase=R_phase+1J*X_phase # ohm\n", + "Vd_phase=IL*(pf-1J*pf)*Z_phase # V\n", + "VS=(Vd_phase+VRphase) # V\n", + "regulation=(VS-VRphase)/VRphase*100 # %\n", + "print \"regulation = %.f percent\"%abs(regulation)\n", + "PL=3*IL**2*R_phase/1000 # kW\n", + "Po=P+PL # kW\n", + "eta=P/Po*100 # %\n", + "print \"Efficiency = %.f percent\"%(eta)\n", + "\n", + "#for pf2=0.9 # lagging\n", + "pf=0.9 # lagging\n", + "IL=P*10**3/sqrt(3)/(V*1000)/pf # A\n", + "VRphase=V*1000/sqrt(3) # V\n", + "R_phase=l*R # ohm\n", + "X_phase=l*X # ohm\n", + "Z_phase=R_phase+1J*X_phase # ohm\n", + "Vd_phase=IL*(pf-1J*.435)*Z_phase # V\n", + "VS=(Vd_phase+VRphase) # V\n", + "regulation=(VS-VRphase)/VRphase*100 # %\n", + "print \"\\n\\n regulation = %.1f percent\"%abs(regulation)\n", + "PL=3*IL**2*R_phase/1000 # kW\n", + "Po=P+PL # kW\n", + "eta=P/Po*100 # %\n", + "print \"Efficiency = %.f percent\"%(eta)\n", + "#ans wrong for 2nd part in the book." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 35 Page 378" + ] + }, + { + "cell_type": "code", + "execution_count": 82, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "lamp1 : Total cost/hour = 0.488 paise\n", + "lamp2 : Total cost/hour = 0.61 paise\n", + "on comparing cost it is clear lamp1 will be more economical. \n", + "\n", + "\n", + " load factor = 28 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "C1=1.2 # Rs\n", + "C2=5 # Rs\n", + "P1=100 # W\n", + "P2=30 # W\n", + "t=1000 # hours\n", + "Ce=60 # Rs/kW/annum for max demand\n", + "Cee=3 # paise/unit for extra\n", + "\n", + "#first lamp\n", + "Cl1=C1*100/t # paise / hour\n", + "dmax1=P1/1000 # kW/hour\n", + "Cmax1=Ce*100*dmax1/(24*365) # paise/hour\n", + "CE1=Cee*dmax1 # /paise / hour\n", + "CT1=Cl1+Cmax1+CE1 # paise (total cost per hour)\n", + "print \"lamp1 : Total cost/hour = %.3f paise\"%(CT1)\n", + "#second lamp\n", + "Cl2=C2*100/t # paise / hour\n", + "dmax2=P2/1000 # kW/hour\n", + "Cmax2=Ce*100*dmax2/(24*365) # paise/hour\n", + "CE2=Cee*dmax2 # /paise / hour\n", + "CT2=Cl2+Cmax2+CE2 # paise (total cost per hour)\n", + "print \"lamp2 : Total cost/hour = %.2f paise\"%(CT2)\n", + "print \"on comparing cost it is clear lamp1 will be more economical. \"\n", + "#let load factor = x\n", + "#Cl1+Cmax1/x+CE1=Cl2+Cmax2/x+CE2\n", + "x=(Cmax1-Cmax2)/(Cl2+CE2-Cl1-CE1)*100 # % load factor\n", + "print \"\\n\\n load factor = %.f percent\"%(x)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 36 Page 379" + ] + }, + { + "cell_type": "code", + "execution_count": 83, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "(a) extra shunt field turns required = 104\n", + "(b) extra shunt field turns required = 52\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "p=4 # pole\n", + "I1=143 # A\n", + "Z=492 # armature conductors\n", + "theta=10 # degree\n", + "I2=10 # A\n", + "\n", + "Ia=I1+I2 # A\n", + "Iw=Ia/2 # A for wave sound\n", + "Il=Ia/4 # for lap sound\n", + "#part(a)\n", + "ATw=Z*Iw*theta/360 # AT\n", + "nw=ATw/theta # turns \n", + "print \"(a) extra shunt field turns required = %d\"%(nw)\n", + "\n", + "#part(b)\n", + "ATl=Z*Il*theta/360 # AT\n", + "nl=ATl/theta # turns \n", + "print \"(b) extra shunt field turns required = %d\"%(nl)\n", + "#answer wrong for part(a) in the boko." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 37 Page 380" + ] + }, + { + "cell_type": "code", + "execution_count": 84, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "New speed will be 570 rpm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import roots\n", + "# Given\n", + "Wh=250 # W\n", + "We=100 # W\n", + "N=1000/60 # rps\n", + "\n", + "A=Wh/N # constant\n", + "B=We/N**2 # constant\n", + "Wnew=1/2*(Wh+We) # W\n", + "#Wnew=A*N1+B*N1**2\n", + "p=[B,A,-Wnew] # polynomial for N1\n", + "N1=roots(p) # rps\n", + "N1=N1[1]*60 # rpm#discarding -ve vealue\n", + "print \"New speed will be %.f rpm\"%(N1)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 38 Page 381" + ] + }, + { + "cell_type": "code", + "execution_count": 85, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Speed of the machine running as shunt motor = 381 rpm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "P=50 # kW\n", + "V=250#V\n", + "N1=400 # rpm\n", + "Ra=0.02 # ohm\n", + "Rf=50 # ohm\n", + "Pi=50 # kW\n", + "Vin=250 # V\n", + "Vd=1 # V per Brush\n", + "\n", + "I=P*10**3/V#A\n", + "Ish=V/Rf # A\n", + "Ia=I+Ish # A\n", + "Va=Ia*Ra # V\n", + "Vbd=2*Vd # V\n", + "Eb1=V+Va+Vbd # V\n", + "\n", + "\n", + "#as motor\n", + "I=P*10**3/V#A\n", + "Ish=V/Rf # A\n", + "Ia=I-Ish # A\n", + "\n", + "Va=Ia*Ra # V\n", + "Vbd=2*Vd # V\n", + "Eb2=V-Va-Vbd # V\n", + "N2=(Eb2/Eb1)*N1 # rpm\n", + "print \"Speed of the machine running as shunt motor = %.f rpm\"%(N2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 39 Page 383" + ] + }, + { + "cell_type": "code", + "execution_count": 86, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Motor efficiency = 92 percent\n", + "Generator efficiency = 92 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "VL=250 # V\n", + "Is=50 # A\n", + "Ia=380 # A\n", + "If1=5 # A\n", + "If2=4.2 # A\n", + "ra=0.02 # ohm\n", + "\n", + "#Machine Losses:\n", + "ma_cu_loss=Ia**2*ra # W (motor armature cu loss)\n", + "ga_cu_loss=(Ia-Is)**2*ra # W (generator armature cu loss)\n", + "P=VL*Is # W\n", + "stray_loss=P-ma_cu_loss-ga_cu_loss # W\n", + "stray_loss_per_machine=stray_loss/2 # W\n", + "\n", + "#Motor efficiency\n", + "field_cu_loss=VL*If2 # W\n", + "total_loss=ma_cu_loss+field_cu_loss+stray_loss_per_machine # W\n", + "Pin_motor=(VL*Ia)+(VL*ra) # W\n", + "Pout_motor=Pin_motor-total_loss # W\n", + "Eff=Pout_motor/Pin_motor*100 # %\n", + "print \"Motor efficiency = %.f percent\"%(Eff)\n", + "\n", + "\n", + "#Generator efficiency\n", + "field_cu_loss=VL*If1 # W\n", + "total_loss=ga_cu_loss+field_cu_loss+stray_loss_per_machine # W\n", + "Pout_generator=VL*(Ia-Is) # W\n", + "Pin_generator=Pout_generator+total_loss # W\n", + "Eff=Pout_motor/Pin_motor*100 # %\n", + "print \"Generator efficiency = %.f percent\"%(Eff)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 40 Page 384" + ] + }, + { + "cell_type": "code", + "execution_count": 87, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Full load efficiency : \n", + "at unity power factor = 96.8 percent\n", + "at 0.8 power factor = 96.0 percent\n", + "\n", + "\n", + " Voltage drop at unity pf = 393.8 V\n", + "Voltage drop at 0.8 pf lagging = 384.0 V\n", + "Voltage drop at 0.8 pf leading = 406 V\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "KVA=4 # kVA\n", + "V1=200#V\n", + "V2=400#V\n", + "f=50 # Hz\n", + "Io1=0.8 # A\n", + "P1=70 # W\n", + "Vs2=17.5 # V\n", + "Is2=9 # A\n", + "P2=50 # W\n", + "\n", + "#full load\n", + "I_loss=P1 # W\n", + "I2=KVA*1000/V2 # A\n", + "Cu_loss=(I2/Is2)**2*P2 # W\n", + "Zo2=Vs2/Is2 # ohm\n", + "Ro2=P2/Is2**2 # ohm\n", + "Xo2=sqrt(Zo2**2-Ro2**2) # ohm\n", + "\n", + "#(a) \n", + "print \"Full load efficiency : \"\n", + "#unity pf\n", + "pf=1 # power factor\n", + "Output=KVA*pf # kW\n", + "Losses=Cu_loss+I_loss # W\n", + "eta=Output*1000/(Output*1000+Losses)*100 # %\n", + "print \"at unity power factor = %.1f percent\"%(eta)\n", + "#0.8 pf\n", + "pf=0.8 # power factor\n", + "Output=KVA*pf # kW\n", + "eta=Output*1000/(Output*1000+Losses)*100 # %\n", + "print \"at 0.8 power factor = %.1f percent\"%(eta)\n", + "\n", + "#(b)\n", + "#(i) unity pf\n", + "Vd=I2*Ro2 # V\n", + "V22=V2-Vd # V\n", + "print \"\\n\\n Voltage drop at unity pf = %.1f V\"%(V22)\n", + "#(i) 0.8 pf lagging\n", + "pf=0.8 # power factor\n", + "Vd=I2*(Ro2*pf+Xo2*sqrt(1-pf**2)) # V\n", + "V22=V2-Vd # V\n", + "print \"Voltage drop at 0.8 pf lagging = %.1f V\"%(V22)\n", + "#(i) 0.8 pf leading\n", + "pf=0.8 # power factor\n", + "Vd=I2*(Ro2*pf-Xo2*sqrt(1-pf**2)) # V\n", + "V22=V2-Vd # V\n", + "print \"Voltage drop at 0.8 pf leading = %.f V\"%(V22)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 41 Page 385" + ] + }, + { + "cell_type": "code", + "execution_count": 88, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "All day efficiency = 97 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "KVA=15 # kVA\n", + "pf=1#\n", + "eff=98/100 # efficiency\n", + "\n", + "L1=2 # kW\n", + "pf1=0.5 # lagging\n", + "t1=12 # hours\n", + "L2=12 # kW\n", + "pf2=0.8 # lagging\n", + "t2=6 # hours\n", + "L3=18 # kW\n", + "pf3=0.9 # lagging\n", + "t3=6 # hours\n", + "\n", + "Po=KVA*pf # kW\n", + "Pin=Po/eff # kW\n", + "Losses=Pin-Po # kW\n", + "Cu_loss=Losses/2 # kW\n", + "I_loss=Losses/2 # kW\n", + "\n", + "KVA1=L1/pf1 # kVA\n", + "KVA2=L2/pf2 # kVA\n", + "KVA3=L3/pf3 # kVA\n", + "Cu_loss1=Cu_loss*(KVA1/KVA2)**2 # kW\n", + "Cu_loss2=Cu_loss*(KVA2/KVA2)**2 # kW\n", + "Cu_loss3=Cu_loss*(KVA3/KVA2)**2 # kW\n", + "\n", + "Cu_loss_t1=Cu_loss1*t1 # kW\n", + "Cu_loss_t2=Cu_loss2*t2 # kW\n", + "Cu_loss_t3=Cu_loss3*t3 # kW\n", + "Cu_loss_total=Cu_loss_t1+Cu_loss_t2+Cu_loss_t3 # kW\n", + "I_loss24=I_loss*24 # Wh\n", + "\n", + "Po24=L1*t1+L2*t2+L3*t3 # kWh\n", + "Pi24=Po24+Cu_loss_total+I_loss24 # kWh\n", + "eff_allday=Po24/Pi24*100 # %\n", + "print \"All day efficiency = %.f percent\"%(eff_allday)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 42 Page 386" + ] + }, + { + "cell_type": "code", + "execution_count": 89, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Current drawn by the transformer=42.67 A\n", + "power factor = 0.9 lagging\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "V1=250 # V\n", + "V2=150 # V\n", + "Vs1=200 # V\n", + "Load1=5 # kW\n", + "pf1=0.8 # lagging\n", + "Load2=2 # kW\n", + "pf2=1 # unity\n", + "Vs2=100 # V\n", + "\n", + "I1=Load1*1000/V1/pf1 # A\n", + "t1_ratio=V1/Vs1 # \n", + "Ip1=I1*t1_ratio # A at 0.8 pf (current drawn by primary)\n", + "\n", + "I2=Load2*1000/Vs2/pf2 # A\n", + "t2_ratio=Vs2/V2 # \n", + "Ip2=I2*t2_ratio # A at 0.8 pf (current drawn by primary)\n", + "\n", + "Ipx=Ip1*pf1+Ip2 # A\n", + "Ipy=Ip1*sqrt(1-pf1**2) # A\n", + "I3=sqrt(Ipx**2+Ipy**2) # A\n", + "print \"Current drawn by the transformer=%.2f A\"%(I3)\n", + "pf=Ipx/I3 # power factor\n", + "print \"power factor = %.1f lagging\"%(pf)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 43 Page 387" + ] + }, + { + "cell_type": "code", + "execution_count": 90, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Percentage reduction in stator voltage = 23 percent\n", + "power factor = 0.3\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,atan,cos\n", + "# Given\n", + "R2=0.03 # ohm\n", + "X2=0.18 # ohm\n", + "Ns=100 # rpm\n", + "s1=3 # %\n", + "\n", + "\n", + "Nfl=(100-s1) # rpm (full load speed)\n", + "N2=Nfl/2 # rpm\n", + "s2=(Ns-N2)/Ns*100 # %\n", + "V1BYV2=sqrt(s2/s1*(R2**2+(s1/100*X2)**2)/(R2**2+(s2/100*X2)**2)) # from torque equation\n", + "#let V1=V12BYV1 V2=1\n", + "V1=V1BYV2 # V\n", + "V2=1 # V\n", + "V12BYV1=(V1-1)/V1*100 # % reduction in the stator (V12=V1-V2)\n", + "print \"Percentage reduction in stator voltage = %.f percent\"%(V12BYV1)\n", + "fi=atan(s2/100*X2/R2) # radian\n", + "pf=cos(fi) # power factor\n", + "print \"power factor = %.1f\"%(pf)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 44 Page 388" + ] + }, + { + "cell_type": "code", + "execution_count": 91, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "(a) at standstill, To:Ti = 40:1\n", + "(b) at s=0.05, To:Ti = 0.4:1\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "\n", + "# Given\n", + "zo=1+1J*1 # ohm\n", + "zi=0.2+1J*4 # ohm\n", + "Ri=zi.real # ohm\n", + "Ro=(zo).real # ohm\n", + "\n", + "#at standstill\n", + "s=1 # % at standstill\n", + "Zo=sqrt((zo).real**2+(zo).imag**2) # ohm\n", + "Zi=sqrt((zi).real**2+(zi).imag**2) # ohm\n", + "ToBYTi=Ro/Ri*(Zi/Zo)**2 # torque ratio\n", + "print \"(a) at standstill, To:Ti = %d:1\"%(ToBYTi)\n", + "\n", + "#at s=0.5\n", + "s=0.05 # %\n", + "Zo=sqrt((zo).real**2/s**2+(zo).imag**2) # ohm\n", + "Zi=sqrt((zi).real**2/s**2+(zi).imag**2) # ohm\n", + "ToBYTi=Ro/Ri*(Zi/Zo)**2 # torque ratio\n", + "print \"(b) at s=0.05, To:Ti = %.1f:1\"%(ToBYTi)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 45 Page 389" + ] + }, + { + "cell_type": "code", + "execution_count": 92, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "no. of turns in primary = 582\n", + "no. of turns in secondary = 18\n", + "\n", + "cross section of primary winding=5.24e-04 m**2\n", + "cross section of secondary winding=1.7e-05 m**2\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "Edc=500 # V\n", + "fim=.085 # Wb\n", + "f=50 # Hz\n", + "E1=11000 # V\n", + "P=1500 # kW\n", + "p=8 # pole\n", + "pf=0.9\n", + "V=500 # V\n", + "J=3 # A/mm**2\n", + "\n", + "E2=Edc/sqrt(2)#V\n", + "N2=E2/4.44/f/fim # no. of turns\n", + "N1=E1/E2*N2 # no. of turns\n", + "print \"no. of turns in primary = %d\"%(N1)\n", + "print \"no. of turns in secondary = %d\"%(N2)\n", + "Idc=P*10**3/V # A\n", + "eta=1 # because of no loss\n", + "ISR=0.472*Idc/(eta*pf)\n", + "A1=ISR/J*10**-6 # m**2 (cross section area)\n", + "I1=N2/N1*ISR # A\n", + "A2=I1/J*10**-6 # m**2 (cross section area of primary winding)\n", + "print \"\\ncross section of primary winding=%.2e m**2\"%(A1)\n", + "print \"cross section of secondary winding=%.1e m**2\"%(A2)\n", + "#ans in the book are not accurate." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 46 Page 391" + ] + }, + { + "cell_type": "code", + "execution_count": 93, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Suitable auto transformation ratio = 77.5\n", + "Starting torque Tst = 15 percent of full-load torque\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "\n", + "# Given\n", + "IscBYIfl=5 # as Isc=5*Ifl\n", + "ILByIfl=3 # as IL <= 3*Ifl\n", + "sf=5 # %\n", + "\n", + "#IL=K**2*ISC\n", + "#dividing by Ifl\n", + "K=sqrt(ILByIfl/IscBYIfl)*100 # %\n", + "TstBYTf=(K/100)**2*IscBYIfl*sf/100*100 # % #ratio of torque\n", + "print \"Suitable auto transformation ratio = %.1f\"%(K)\n", + "print \"Starting torque Tst = %.f percent of full-load torque\"%(TstBYTf)\n", + "#ans wrong in the textbook." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 47 Page 391" + ] + }, + { + "cell_type": "code", + "execution_count": 94, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "no of studs = 5 and no. of section = 4\n", + "\n", + "Resistance of 1st section = 2.24 ohm\n", + "Resistance of 2nd section = 1.49 ohm\n", + "Resistance of 3rd section = 0.99 ohm\n", + "Resistance of 4th section = 0.68 ohm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import log\n", + "\n", + "# Given\n", + "V=500 # V\n", + "ns=60 # slots\n", + "nc=20 # conductor/slot\n", + "ra=1.31 # ohm\n", + "Tmax=218 # N-m\n", + "fi=23*10**-3 # Wb\n", + "\n", + "Tmin=Tmax/1.5#N-m\n", + "Z=ns*nc # no of conductors\n", + "Ia=Tmax/(.159*fi*Z) # A\n", + "Imax=1.5*Ia # A\n", + "I1=Imax # A\n", + "I2=Ia # A\n", + "R1=V/I1 # ohm\n", + "n= log(R1/ra)/log(I1/I2)+1 # no of studs\n", + "N=n-1 # no of section\n", + "print \"no of studs = %d and no. of section = %d\"%(n,N)\n", + "R2=R1*(I2/I1) # ohm\n", + "R3=R2*(I2/I1) # ohm\n", + "R4=R3*(I2/I1) # ohm\n", + "R1s=R1-R2 # ohm\n", + "R2s=R2-R3 # ohm\n", + "R3s=R3-R4 # ohm\n", + "R4s=R4-ra # ohm\n", + "print \"\\nResistance of 1st section = %.2f ohm\"%(R1s)\n", + "print \"Resistance of 2nd section = %.2f ohm\"%(R2s)\n", + "print \"Resistance of 3rd section = %.2f ohm\"%(R3s)\n", + "print \"Resistance of 4th section = %.2f ohm\"%(R4s)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 48 Page 393" + ] + }, + { + "cell_type": "code", + "execution_count": 95, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "temperature rise after 2 hours full load = 55 degree C\n", + "temperature rise of cold water after 1 hour = 28 degree C\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import log,exp\n", + "\n", + "# Given\n", + "theta1=20 # degree C\n", + "theta2=35 # degree C\n", + "t1=0.5 # hour\n", + "t2=1 # hour\n", + "theta_m_dashBYthetam=80/100 # temperature rise\n", + "\n", + "#theta=theta_m*(1-e**(-t/alfa))\n", + "#theta1/theta2=(1-exp(-t1/alfa))/(1-exp(-t2/alfa))\n", + "ee1=theta2/theta1-1 # let ee1=exp(-1/2/alfa)\n", + "theta_m=theta1/(1-ee1) # degree C\n", + "theta_2=theta_m*(1-ee1**4) # degree C (after 2 hours)\n", + "print \"temperature rise after 2 hours full load = %.f degree C\"%(theta_2)\n", + "alfa=-1/2/log(ee1) # hour\n", + "alfa_dash=theta_m_dashBYthetam*alfa # hour\n", + "theta_m_dash=theta_m_dashBYthetam*theta_m\n", + "theta_dash=theta_m_dash*(1-exp(-t2/alfa))\n", + "print \"temperature rise of cold water after 1 hour = %.f degree C\"%(theta_dash)\n", + "#ans of 2nd part is wrong in the book." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 49 Page 394" + ] + }, + { + "cell_type": "code", + "execution_count": 96, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Regulation at no load voltage = 6.7 percent\n", + "Regulation at full load voltage = 7.2 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,cos,pi,sin\n", + "\n", + "# Given\n", + "u=30 # degree \n", + "m=3 # no of phases\n", + "\n", + "#Id=sqrt(2)*Vs*X*(1-cosd(u))*sin(pi/m)\n", + "IdBYVs_dash=m/2/pi*(1-cos(pi/180*u))*sin(pi/m)*sqrt(2) # load current/Vs\n", + "#where IdBYVs_dash = m/pi*IdX/2\n", + "EdoBYVs=sqrt(2)*m/pi*sin(pi/m) # dc output voltage/Vs with no overlap\n", + "EduBYVs=EdoBYVs-IdBYVs_dash # dc output voltage/Vs with overlap\n", + "#part (a)\n", + "Reg1=(EdoBYVs-EduBYVs)/EdoBYVs*100 # % (regulation)\n", + "print \"Regulation at no load voltage = %.1f percent\"%(Reg1)\n", + "#part (b)\n", + "Reg2=(EdoBYVs-EduBYVs)/EduBYVs*100 # % (regulation)\n", + "print \"Regulation at full load voltage = %.1f percent\"%(Reg2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 50 Page 395" + ] + }, + { + "cell_type": "code", + "execution_count": 97, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Current for each machine = 370 A & 1630 A \n", + "Power output for each machine = 162.3 kW & 716.3 kW\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from numpy import array\n", + "# Given\n", + "I12=2000 # A (I12=I1+I2)\n", + "R1=0.04 # ohm\n", + "R2=0.025 # ohm\n", + "rf1=25 # ohm\n", + "rf2=20 # ohm\n", + "E1=440 # V\n", + "E2=420 # V\n", + "\n", + "#E-Vad=V where Vad=I1+V/rf1\n", + "#V*(1+R1/rf1)+R1*I1=E1#eqn(1)\n", + "#V*(1+R2/rf2)-I1*R2=E2-I12*R2# eqn(2)\n", + "A=array([[(1+R1/rf1),R1],[(1+R2/rf2),-R2]])# # matrix for solution\n", + "B=array([[E1],[E2-I12*R2]]) # matrix for solution\n", + "X=A**-1*B # solution\n", + "V=X[0,0] # V\n", + "I1=X[1,0] # A\n", + "I2=I12-I1 # A\n", + "print \"Current for each machine = %.f A & %.f A \"%(I1,I2)\n", + "Po1=V*I1 # W\n", + "Po2=V*I2 # W\n", + "print \"Power output for each machine = %.1f kW & %.1f kW\"%(Po1/1000,Po2/1000)\n", + "#ans in the book are wrong." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 51 Page 396" + ] + }, + { + "cell_type": "code", + "execution_count": 98, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "pf transformer A = 0.82 lag\n", + "pf transformer B = 0.78 lag\n", + "power output transformer A = 6535 W\n", + "power output transformer B = 4925 W\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import atan,pi,cos,degrees\n", + "# Given\n", + "ZA=0.15+0.5*1J # ohm\n", + "ZB=0.1+0.6*1J # ohm\n", + "EA=207 # V\n", + "EB=205 # V\n", + "ZL=2+1.5*1J # ohm\n", + "\n", + "IA=(EA*ZB+(EA-EB)*ZL)/(ZA*ZB+ZL*(ZA+ZB)) # A\n", + "IB=(EB*ZA-(EA-EB)*ZL)/(ZA*ZB+ZL*(ZA+ZB)) # A\n", + "V2=(IA+IB)*ZL # V\n", + "fi_A=degrees(atan((V2).imag/(V2).real)-(atan((IA.imag)/(IA.real))))\n", + "pf_A=cos(pi/180*fi_A) # lag\n", + "print \"pf transformer A = %.2f lag\"%(pf_A)\n", + "fi_B=degrees(atan((V2.imag)/(V2.real))-(atan((IB.imag)/(IB.real))))\n", + "pf_B=cos(pi/180*fi_B) # lag\n", + "print \"pf transformer B = %.2f lag\"%(pf_B)\n", + "PA=abs(V2*IA*pf_A) # W\n", + "print \"power output transformer A = %.f W\"%(PA)\n", + "PB=abs(V2*IB*pf_B) # W\n", + "print \"power output transformer B = %.f W\"%(PB)\n", + "#Power output ans are wrong in the book." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 52 Page 397" + ] + }, + { + "cell_type": "code", + "execution_count": 99, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "filament length = 1.26 m\n", + "filament diameter = 20 um\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "# Given\n", + "d1=0.05*10**-3 # mm\n", + "l1=100*10**-2 # m\n", + "i2BYi1=1/4 # current ratio\n", + "#(d2/d1)**(3/2)=i2BYi1\n", + "d2=(i2BYi1)**(2/3)*d1*10**6 # um\n", + "l2=1/2*l1*d1/d2*10**6 # m\n", + "print \"filament length = %.2f m\"%(l2)\n", + "print \"filament diameter = %.f um\"%(d2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 53 Page 398" + ] + }, + { + "cell_type": "code", + "execution_count": 100, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "filament length = 1.6 m\n", + "filament diameter = 48 um\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "# Given\n", + "d1=0.10*10**-3 # mm\n", + "l1=150*10**-2 # m\n", + "i2BYi1=1/3 # current ratio\n", + "#(d2/d1)**(3/2)=i2BYi1\n", + "d2=(i2BYi1)**(2/3)*d1*10**6 # um\n", + "l2=1/2*l1*d1/d2*10**6 # m\n", + "print \"filament length = %.1f m\"%(l2)\n", + "print \"filament diameter = %.f um\"%(d2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 54 Page 398" + ] + }, + { + "cell_type": "code", + "execution_count": 101, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "(a) at standstill, To:Ti = 8:1\n", + "(b) at s=0.05, To:Ti = 3:10\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "zo=2+1J*2 # ohm\n", + "zi=0.5+1J*4 # ohm\n", + "Ri=(zi).real # ohm\n", + "Ro=(zo).real # ohm\n", + "\n", + "#at standstill\n", + "s=1 # % at standstill\n", + "Zo=sqrt((zo.real)**2+(zo.imag)**2) # ohm\n", + "Zi=sqrt((zi.real)**2+(zi.imag)**2) # ohm\n", + "ToBYTi=Ro/Ri*(Zi/Zo)**2 # torque ratio\n", + "print \"(a) at standstill, To:Ti = %d:1\"%(ToBYTi)\n", + "\n", + "#at s=0.5\n", + "s=0.05 # %\n", + "Zo=sqrt((zo.real)**2/s**2+(zo.imag)**2) # ohm\n", + "Zi=sqrt((zi.real)**2/s**2+(zi.imag)**2) # ohm\n", + "ToBYTi=Ro/Ri*(Zi/Zo)**2 # torque ratio\n", + "print \"(b) at s=0.05, To:Ti = %.f:10\"%(ToBYTi*10)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 55 Page 400" + ] + }, + { + "cell_type": "code", + "execution_count": 102, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "no. of turns in primary = 415\n", + "no. of turns in secondary = 12\n", + "\n", + "cross section of primary winding=6.56e-04 m**2\n", + "cross section of secondary winding=1.9e-05 m**2\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "\n", + "# Given\n", + "Edc=250 # V\n", + "fim=.065 # Wb\n", + "f=50 # Hz\n", + "E1=6000 # V\n", + "P=1500 # kW\n", + "p=8 # pole\n", + "pf=0.9\n", + "V=400 # V\n", + "J=3 # A/mm**2\n", + "\n", + "E2=Edc/sqrt(2)#V\n", + "N2=E2/4.44/f/fim # no. of turns\n", + "N1=E1/E2*N2 # no. of turns\n", + "print \"no. of turns in primary = %d\"%(N1)\n", + "print \"no. of turns in secondary = %d\"%(N2)\n", + "Idc=P*10**3/V # A\n", + "eta=1 # because of no loss\n", + "ISR=0.472*Idc/(eta*pf)\n", + "A1=ISR/J*10**-6 # m**2 (cross section area)\n", + "I1=N2/N1*ISR # A\n", + "A2=I1/J*10**-6 # m**2 (cross section area of primary winding)\n", + "print \"\\ncross section of primary winding=%.2e m**2\"%(A1)\n", + "print \"cross section of secondary winding=%.1e m**2\"%(A2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 56 Page 400" + ] + }, + { + "cell_type": "code", + "execution_count": 103, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Suitable auto transformation ratio = 86.6\n", + "Starting torque Tst = 12 percent of full-load torque\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "IscBYIfl=4 # as Isc=5*Ifl\n", + "ILByIfl=3 # as IL <= 3*Ifl\n", + "sf=4 # %\n", + "\n", + "#IL=K**2*ISC\n", + "#dividing by Ifl\n", + "K=sqrt(ILByIfl/IscBYIfl)*100 # %\n", + "TstBYTf=(K/100)**2*IscBYIfl*sf/100*100 # % #ratio of torque\n", + "print \"Suitable auto transformation ratio = %.1f\"%(K)\n", + "print \"Starting torque Tst = %.f percent of full-load torque\"%(TstBYTf)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 57 Page 401" + ] + }, + { + "cell_type": "code", + "execution_count": 104, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "temperature rise after 2 hours full load = 56 degree C\n", + "temperature rise of cold water after 1 hour = 27 degree C\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import log,exp\n", + "# Given\n", + "theta1=30 # degree C\n", + "theta2=45 # degree C\n", + "t1=0.5 # hour\n", + "t2=1 # hour\n", + "theta_m_dashBYthetam=60/100 # temperature rise\n", + "\n", + "#theta=theta_m*(1-e**(-t/alfa))\n", + "#theta1/theta2=(1-exp(-t1/alfa))/(1-exp(-t2/alfa))\n", + "ee1=theta2/theta1-1 # let ee1=exp(-1/2/alfa)\n", + "theta_m=theta1/(1-ee1) # degree C\n", + "theta_2=theta_m*(1-ee1**4) # degree C (after 2 hours)\n", + "print \"temperature rise after 2 hours full load = %.f degree C\"%(theta_2)\n", + "alfa=-1/2/log(ee1) # hour\n", + "alfa_dash=theta_m_dashBYthetam*alfa # hour\n", + "theta_m_dash=theta_m_dashBYthetam*theta_m\n", + "theta_dash=theta_m_dash*(1-exp(-t2/alfa))\n", + "print \"temperature rise of cold water after 1 hour = %.f degree C\"%(theta_dash)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 58 Page 401" + ] + }, + { + "cell_type": "code", + "execution_count": 105, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "at slip=0, To:Ti = 7:1\n", + "at s=0.05, To:Ti = 3:10\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt\n", + "# Given\n", + "zo=2+1J*3 # ohm\n", + "zi=0.5+1J*5 # ohm\n", + "Ri=(zi.real) # ohm\n", + "Ro=(zo.real) # ohm\n", + "\n", + "#at standstill\n", + "s=1 # % at standstill\n", + "Zo=sqrt((zo.real)**2+(zo.imag)**2) # ohm\n", + "Zi=sqrt((zi.real)**2+(zi.imag)**2) # ohm\n", + "ToBYTi=Ro/Ri*(Zi/Zo)**2 # torque ratio\n", + "print \"at slip=0, To:Ti = %d:1\"%(ToBYTi)\n", + "\n", + "#at s=0.5\n", + "s=0.05 # %\n", + "Zo=sqrt((zo.real)**2/s**2+(zo.imag)**2) # ohm\n", + "Zi=sqrt((zi.real)**2/s**2+(zi.imag)**2) # ohm\n", + "ToBYTi=Ro/Ri*(Zi/Zo)**2 # torque ratio\n", + "print \"at s=0.05, To:Ti = %.f:10\"%(ToBYTi*10)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 59 Page 402" + ] + }, + { + "cell_type": "code", + "execution_count": 106, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "part(a) Regulation at no load voltage = 15 percent\n", + "part(b) Regulation at full load voltage = 17 percent\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,pi,sin,cos\n", + "\n", + "# Given\n", + "u=45 # degree \n", + "m=3 # no of phases\n", + "\n", + "#Id=sqrt(2)*Vs*X*(1-cosd(u))*sin(pi/m)\n", + "IdBYVs_dash=m/2/pi*(1-cos(pi/180*u))*sin(pi/m)*sqrt(2) # load current/Vs\n", + "#where IdBYVs_dash = m/pi*IdX/2\n", + "EdoBYVs=sqrt(2)*m/pi*sin(pi/m) # dc output voltage/Vs with no overlap\n", + "EduBYVs=EdoBYVs-IdBYVs_dash # dc output voltage/Vs with overlap\n", + "#part (a)\n", + "Reg1=(EdoBYVs-EduBYVs)/EdoBYVs*100 # % (regulation)\n", + "print \"part(a) Regulation at no load voltage = %.f percent\"%(Reg1)\n", + "#part (b)\n", + "Reg2=(EdoBYVs-EduBYVs)/EduBYVs*100 # % (regulation)\n", + "print \"part(b) Regulation at full load voltage = %.f percent\"%(Reg2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 60 Page 402" + ] + }, + { + "cell_type": "code", + "execution_count": 107, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "length of filament = 1.89 m\n", + "diameter of filament = 60 um\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "\n", + "# Given\n", + "d1=0.15*10**-3 # mm\n", + "l1=150*10**-2 # m\n", + "i2BYi1=1/4 # current ratio\n", + "#(d2/d1)**(3/2)=i2BYi1\n", + "d2=(i2BYi1)**(2/3)*d1*10**6 # um\n", + "l2=1/2*l1*d1/d2*10**6 # m\n", + "print \"length of filament = %.2f m\"%(l2)\n", + "print \"diameter of filament = %.f um\"%(d2)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 61 Page 403" + ] + }, + { + "cell_type": "code", + "execution_count": 108, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "Potential difference = 1875 V\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,sin,pi\n", + "# Given\n", + "d=5/100 # m\n", + "S=-4/100 # m\n", + "Ve=3 # kV\n", + "theta=45 # degree\n", + "e=1.6*10**-19 # C\n", + "m=9.67*10**-31 # kg\n", + "\n", + "u=sqrt(2*e*Ve*1000/m) # m/s\n", + "uy=u*sin(pi/180*theta) # m/s\n", + "vy=0 # since final velocity =0\n", + "#vy**2-uy**2=2*ay*S\n", + "ay=(vy**2-uy**2)/2/S # m**2/s\n", + "#ay=e/m*V/d\n", + "V=ay*m*d/e # V\n", + "print \"Potential difference = %.f V\"%(V)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Ex 62 Page 403" + ] + }, + { + "cell_type": "code", + "execution_count": 109, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "reading of ammeter 1= 0.56 A\n", + "reading of ammeter 2 = 0.30 A\n", + "\n", + "\n", + "Power taken from the mains = 162.0 W\n", + "Power dissipated in rectifying device = 115 W\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi\n", + "from sympy.mpmath import quad\n", + "# Given\n", + "R=150 # ohm\n", + "Vrms=200 # V\n", + "Rd1=65 # ohm\n", + "Rd2=140 # ohm \n", + "\n", + "Vm=Vrms/sqrt(2) # V\n", + "#v=Vm*sin(theta)\n", + "Rf=R+Rd1 # ohm\n", + "Rb=R+Rd2 # ohm\n", + "#i_f=v/Rf # A\n", + "#i_b=v/Rb # A\n", + "Irms=1/2/pi*(quad(lambda theta:(sqrt(2)*sin(theta))**2,[0,pi])+quad(lambda theta:(sqrt(2)/3*sin(theta))**2,[pi,2*pi]))\n", + "Iav=1/2/pi*(quad(lambda theta:sqrt(2)*sin(theta),[0,pi])+quad(lambda theta:sqrt(2)/3*sin(theta),[pi,2*pi]))\n", + "print \"reading of ammeter 1= %.2f A\"%(Irms)\n", + "print \"reading of ammeter 2 = %.2f A\"%(Iav)\n", + "P=1/2*(Vrms**2/Rf+Vrms**2/Rb) # W\n", + "print \"\\n\\nPower taken from the mains = %.1f W\"%(P)\n", + "Pc=Irms**2*R # W\n", + "Pd=P-Pc # W\n", + "print \"Power dissipated in rectifying device = %d W\"%(Pd)\n", + "#Answer wrong in the textbook." + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 2", + "language": "python", + "name": "python2" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 2 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython2", + "version": "2.7.9" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} diff --git a/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/VgnES.png b/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/VgnES.png Binary files differnew file mode 100644 index 00000000..b3fe4a06 --- /dev/null +++ b/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/VgnES.png diff --git a/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/f4att.png b/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/f4att.png Binary files differnew file mode 100644 index 00000000..429bf068 --- /dev/null +++ b/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/f4att.png diff --git a/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/starNdelta.png b/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/starNdelta.png Binary files differnew file mode 100644 index 00000000..f39b0c05 --- /dev/null +++ b/Problems_in_Electrical_Engineering_by_Parker_Smith/screenshots/starNdelta.png |
