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diff --git a/Electronic_Devices_and_Circuits/Chapter8_1.ipynb b/Electronic_Devices_and_Circuits/Chapter8_1.ipynb new file mode 100755 index 00000000..d91fc639 --- /dev/null +++ b/Electronic_Devices_and_Circuits/Chapter8_1.ipynb @@ -0,0 +1,499 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 08 : BJT specifications and performance"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.2, Page No 313"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "P2=25.0*10**-3#when frequency increase to 20KHz\n",
+ "P1=50.0*10**-3#when signal frequency is 5KHz\n",
+ "\n",
+ "#Calculations\n",
+ "Po=10*math.log((P2/P1),10)\n",
+ "\n",
+ "#Results\n",
+ "print(\" output power change in decibels is %.2f dB \" %Po)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " output power change in decibels is -3.01 dB \n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.3, Page No 314"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "v1=1# output voltage measured at 5KHz\n",
+ "v2=.707# output voltage measure at 20kHz\n",
+ "\n",
+ "#Calculations\n",
+ "Po=20*math.log((v2/v1),10)\n",
+ "\n",
+ "#Results\n",
+ "print(\" output power change is %.2f dB \" %Po)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " output power change is -3.01 dB \n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.4 Page No 317"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Ic=1.0*10**-3\n",
+ "hfe=50.0\n",
+ "hie=1.3*10**3\n",
+ "fT=250.0*10**6\n",
+ "Cbc=5.0*10**-12\n",
+ "Rc=8.2*10**3\n",
+ "Rl=100.0*10**3\n",
+ "\n",
+ "#Calculations\n",
+ "Ie=Ic\n",
+ "Av=(hfe*((Rc*Rl)/(Rc+Rl)))/hie\n",
+ "Cbe=(6.1*Ie)/fT\n",
+ "Cin=(Cbe+(1+Av)*Cbc)*10**9\n",
+ "\n",
+ "#Results\n",
+ "print(\" input capacitance when the circuit operated as CE is %.2fnF \"%Cin)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " input capacitance when the circuit operated as CE is 1.49nF \n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.5, Page No 319"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "R1=100*10**3\n",
+ "R2=47.0*10**3\n",
+ "Re=4.7*10**3\n",
+ "Cbc=5.0*10**-12\n",
+ "Cbe=24.4*10**-12\n",
+ "hfe=50\n",
+ "hie=1.3*10**3\n",
+ "hib=24.5\n",
+ "rs=hib\n",
+ "rs=600.0\n",
+ "\n",
+ "#Calculations\n",
+ "print(\" common emitter circuit\")\n",
+ "Rb=(R1*R2)/(R1+R2)\n",
+ "Zi=(Rb*hie)/(Rb+hie)\n",
+ "Cin=1.48*10**-9\n",
+ "f2=1/(2*3.14*Cin*((rs*Zi)/(rs+Zi)))\n",
+ "print(\"input-capacitance upper cutoff frequency is %dHz \" %f2)\n",
+ "print(\"common base circuit\")\n",
+ "Zi=(Re*hib)/(Re+hib)\n",
+ "Cin=(Cbe+Cbc)\n",
+ "f2=(1/(2*3.14*Cin*((rs*Zi)/(rs+Zi))))*10**-6\n",
+ "\n",
+ "#Results\n",
+ "print(\" input capacitance upper cutoff when operating as CB circuit with base bypassed to ground is %.2f MHz \" %f2)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " common emitter circuit\n",
+ "input-capacitance upper cutoff frequency is 265447Hz \n",
+ "common base circuit\n",
+ " input capacitance upper cutoff when operating as CB circuit with base bypassed to ground is 231.25 MHz \n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.6 Page No 322"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "fT=50.0*10**6\n",
+ "hfe=50.0\n",
+ "f2o=60.0*10**3\n",
+ "Rc=10.0*10**3\n",
+ "\n",
+ "#Calculations\n",
+ "fae=fT/hfe\n",
+ "C4=(1.0/(2*3.14*f2o*Rc))*10**12\n",
+ "\n",
+ "#Results\n",
+ "print(\"capacitance required for C4 to give 60kHz upper cutoff frequency is %.2f pF \" %C4)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "capacitance required for C4 to give 60kHz upper cutoff frequency is 265.39 pF \n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.8 Page No 326"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "ton=100.0*10**-9\n",
+ "Rs=600.0\n",
+ "Rb=4.7*10**3\n",
+ "\n",
+ "#Calculations\n",
+ "C1=(ton/Rs)*10**12\n",
+ "print(\" suitable speed up capacitor is %dpF \" %C1)\n",
+ "C1=160*10**-12#standard value\n",
+ "PWmin=(5*Rs*C1)\n",
+ "SWmin=5*Rb*C1\n",
+ "fmax=1/(PWmin+SWmin)\n",
+ "\n",
+ "#Results\n",
+ "print(\"maximum signal frequency is %.2f Hz \" %(fmax/1000))"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " suitable speed up capacitor is 166pF \n",
+ "maximum signal frequency is 235.85 Hz \n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.9, Page No 330"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "R1=30.0*10**3\n",
+ "R2=30.0*10**3\n",
+ "rs=30.0*10**3\n",
+ "f2=40.0*10**3\n",
+ "f1=100.0\n",
+ "k=1.37*10**-23\n",
+ "R=10.0*10**3\n",
+ "Av=600.0\n",
+ "Ri=3.0*10**3\n",
+ "\n",
+ "#Calculations\n",
+ "Rb=(R1*R2)/(R1+R2)\n",
+ "Rg=(rs*Rb)/(rs+Rb)\n",
+ "T=(273+25)\n",
+ "B=f2-f1\n",
+ "en=math.sqrt(4*k*T*B*R)\n",
+ "eni=en*((Ri/(Ri+Rg)))\n",
+ "eno=(Av*eni)*10**6\n",
+ "\n",
+ "#Results\n",
+ "print(\"noise output voltage is %.2f uV \" %eno)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "noise output voltage is 353.44 uV \n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.10 Page No 331"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "#initialisation of variables\n",
+ "Ic=30.0*10**-6\n",
+ "Vce=5.0\n",
+ "eno=354.0*10**-6\n",
+ "NF=10.0\n",
+ "F=2.51#F=antilog(NF/10)\n",
+ "\n",
+ "#Calculations\n",
+ "Vn=((math.sqrt(F))*eno)*10**6\n",
+ "\n",
+ "#Results\n",
+ "print(\"total noise output volateg for amplifier is %.2f uV \" %Vn)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "total noise output volateg for amplifier is 560.84 uV \n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.11 Page No 333"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "#initialisation of variables\n",
+ "Pd25=625.0*10**-3\n",
+ "D=5.0*10**-3\n",
+ "Vce=10.0\n",
+ "T2=55.0\n",
+ "\n",
+ "#Calculations\n",
+ "Pdt2=Pd25-D*(T2-25)\n",
+ "Pd=Pdt2\n",
+ "Ic=Pd/Vce\n",
+ "\n",
+ "#Results\n",
+ "print(\" maximum Ic level is %.2fA \" %(Ic*1000))\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " maximum Ic level is 47.50A \n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.13 Page No 335"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Pd=80.0\n",
+ "Vce=60.0\n",
+ "\n",
+ "#Calculations\n",
+ "Ic=Pd/Vce\n",
+ "print(\"point 1 Vce=60 and Ic= %.2f A\" %Ic)\n",
+ "Vce=40.0\n",
+ "Ic=Pd/Vce\n",
+ "print(\"point 2 Vce=40 and Ic= %.2f A\" %Ic)\n",
+ "Vce=20.0\n",
+ "Ic=Pd/Vce\n",
+ "print(\" point 3 Vce=20 and Ic= %.2f A\" %Ic)\n",
+ "Vce=10.0\n",
+ "Ic=Pd/Vce\n",
+ "\n",
+ "#Results\n",
+ "print(\" point 4 Vce=10 and Ic= %.2f A\" %Ic)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "point 1 Vce=60 and Ic= 1.33 A\n",
+ "point 2 Vce=40 and Ic= 2.00 A\n",
+ " point 3 Vce=20 and Ic= 4.00 A\n",
+ " point 4 Vce=10 and Ic= 8.00 A\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 8.14, Page No 339"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#initialisation of variables\n",
+ "Vce=20.0\n",
+ "Ic=1.0\n",
+ "T2=90.0\n",
+ "T1=25.0\n",
+ "\n",
+ "#Calculations\n",
+ "Q=Vce*Ic\n",
+ "Qcs=.4\n",
+ "Qjc=1#from table\n",
+ "Qsa=((T2-T1)/Q)-(Qjc+Qcs)\n",
+ "\n",
+ "#Results\n",
+ "print(\"Qsa= %.2f \" %Qsa)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Qsa= 1.85 \n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |