From 251a07c4cbed1a5a960f5ed416ce6ac13c8152b7 Mon Sep 17 00:00:00 2001 From: hardythe1 Date: Thu, 11 Jun 2015 17:31:11 +0530 Subject: add books --- .../chapter08.ipynb | 393 +++++++++++++++++++++ 1 file changed, 393 insertions(+) create mode 100755 Electronic_Devices_and_Circuits_by_D._C._Kulshreshtha/chapter08.ipynb (limited to 'Electronic_Devices_and_Circuits_by_D._C._Kulshreshtha/chapter08.ipynb') diff --git a/Electronic_Devices_and_Circuits_by_D._C._Kulshreshtha/chapter08.ipynb b/Electronic_Devices_and_Circuits_by_D._C._Kulshreshtha/chapter08.ipynb new file mode 100755 index 00000000..7ccf524b --- /dev/null +++ b/Electronic_Devices_and_Circuits_by_D._C._Kulshreshtha/chapter08.ipynb @@ -0,0 +1,393 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:5a78eb3c7cc2f82cd21ccad707b4376bdb45f22452d4892c16308b1bdd58f45f" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "chapter08:Multistage Amplifiers" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E1 - Pg 276" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Express the gain in decibel\n", + "#given\n", + "#Powere gain of 1000\n", + "import math\n", + "Pg1=1000.;\n", + "Pgd1=10.*math.log10(Pg1);\n", + "print '%s %.f %s' %(\"Power gain (in dB)=\",Pgd1,\"dB\\n\");\n", + "\n", + "#Voltage gain of 1000\n", + "Vg1=1000.;\n", + "Vgd1=20.*math.log10(Vg1);\n", + "print '%s %.f %s' %(\"Voltage gain (in dB)=\",Vgd1,\"dB\\n\");\n", + "\n", + "#Powere gain of 1/100\n", + "Pg2=1./100.;\n", + "Pgd2=10.*math.log10(Pg2);\n", + "print '%s %.f %s' %(\"Power gain (in dB)=\",Pgd2,\"dB\\n\");\n", + "\n", + "#Voltage gain of 1/100\n", + "Vg2=1./100.;\n", + "Vgd2=20.*math.log10(Vg2);\n", + "print '%s %.f %s' %(\"Voltage gain (in dB)=\",Vgd2,\"dB\\n\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Power gain (in dB)= 30 dB\n", + "\n", + "Voltage gain (in dB)= 60 dB\n", + "\n", + "Power gain (in dB)= -20 dB\n", + "\n", + "Voltage gain (in dB)= -40 dB\n", + "\n" + ] + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E2 - Pg 276" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Determine power and voltage gain\n", + "#given\n", + "#For Gain = 10 dB\n", + "G=10.;#dB\n", + "Pg1=10.**(G/10.); #taking antilog\n", + "Vg1=10.**(G/20.); #taking antilog\n", + "print '%s %.f %s' %(\"For Gain\",G,\"dB\\n\")\n", + "print '%s %.f %s' %(\"Power gain ratio =\",Pg1,\"\\n\");\n", + "print '%s %.2f %s' %(\"Voltage gain ratio =\",Vg1,\"\\n\");\n", + "\n", + "#For Gain 3 dB\n", + "G=3.;#dB\n", + "Pg2=10.**(G/10.); #taking antilog\n", + "Vg2=10.**(G/20.); #taking antilog\n", + "print '%s %.f %s' %(\"For Gain\",G,\"dB\\n\")\n", + "print '%s %.2f %s' %(\"Power gain ratio =\",Pg2,\"\\n\");\n", + "print '%s %.3f %s' %(\"Voltage gain ratio =\",Vg2,\"\\n\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "For Gain 10 dB\n", + "\n", + "Power gain ratio = 10 \n", + "\n", + "Voltage gain ratio = 3.16 \n", + "\n", + "For Gain 3 dB\n", + "\n", + "Power gain ratio = 2.00 \n", + "\n", + "Voltage gain ratio = 1.413 \n", + "\n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E3 - Pg 277" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Calculate the overall voltage gain\n", + "#given\n", + "import math\n", + "A1=80.\n", + "A2=50.\n", + "A3=30.\n", + "Ad=20.*math.log10(A1)+20.*math.log10(A2)+20.*math.log10(A3);\n", + "\n", + "#Alternatively\n", + "A=A1*A2*A3;\n", + "Ad=20.*math.log10(A);\n", + "print '%s %.2f %s' %(\"The Voltage gain is =\",Ad,\"dB\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The Voltage gain is = 101.58 dB\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E4 - Pg 283" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Calculate quiescent output voltage and small signal voltage gain\n", + "#given\n", + "#At input Voltage =3V\n", + "Vi1=3.##V #input voltage\n", + "Vbe=0.7##V\n", + "B=250.#\n", + "Vcc=10.##V #Supply\n", + "Re1=1.*10.**3.##ohm\n", + "Rc1=3.*10.**3.##ohm\n", + "Re2=2.*10.**3.##ohm\n", + "Rc2=4.*10.**3.##ohm\n", + "Vb1=Vi1# #Voltage at the base of transistor T1\n", + "Ve1=Vb1-Vbe# #Voltage at the emitter of transistor T1\n", + "Ie1=Ve1/Re1#\n", + "Ic1=Ie1#\n", + "Vc1=Vcc-Ic1*Rc1#\n", + "Vb2=Vc1#\n", + "Ve2=Vb2-Vbe#\n", + "Ie2=Ve2/Re2#\n", + "Ic2=Ie2#\n", + "Vo1=Vcc-Ic2*Rc2#\n", + "print '%s %.1f %s' %(\"The quiescent output voltage(At input Voltage = 3V) is =\",Vo1,\"V\\n\")#\n", + "\n", + "#At input Voltage =3.2 V\n", + "Vi2=3.2##V #input voltage\n", + "Vb1=Vi2# #Voltage at the base of transistor T1\n", + "Ve1=Vb1-Vbe# #Voltage at the emitter of transistor T1\n", + "Ie1=Ve1/Re1#\n", + "Ic1=Ie1#\n", + "Vc1=Vcc-Ic1*Rc1#\n", + "Vb2=Vc1#\n", + "Ve2=Vb2-Vbe#\n", + "Ie2=Ve2/Re2#\n", + "Ic2=Ie2#\n", + "Vo2=Vcc-Ic2*Rc2#\n", + "print '%s %.1f %s' %(\"The quiescent output voltage (At input Voltage =3.2 V) is =\",Vo2,\"V\\n\")#\n", + "\n", + "#Small Signal input and output voltage\n", + "vi=Vi2-Vi1#\n", + "vo=Vo2-Vo1#\n", + "Av=vo/vi#\n", + "print '%s %.f' %(\"The small signal voltage gain is =\",Av)\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The quiescent output voltage(At input Voltage = 3V) is = 5.2 V\n", + "\n", + "The quiescent output voltage (At input Voltage =3.2 V) is = 6.4 V\n", + "\n", + "The small signal voltage gain is = 6\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E5 - Pg 296" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Calculate the maximum voltage gain and bandwidth of multistage amplifier\n", + "#FUNCTIONS\n", + "#given\n", + "def prll(r1,r2):\n", + "\tz=r1*r2/(r1+r2)#\n", + "\treturn z\n", + "\n", + "import math\n", + "rin=10.*10.**6.;#ohm #input resistance of JFET\n", + "Rd=10.*10.**3.;#ohm\n", + "Rs=500.;#ohm\n", + "Rg=470.*10.**3.;#ohm\n", + "Rl=470.*10.**3.;#ohm\n", + "Cc=0.01*10.**-6.;#Farad\n", + "Csh=100.*10.**-12.;#Farad\n", + "Cs=50.*10.**-6.;#Farad\n", + "rd=100.*10.**3.;#ohm\n", + "gm=2.*10.**-3.;#S\n", + "Rac2=prll(Rd,Rl);\n", + "Rac1=prll(Rd,Rg);\n", + "Req=prll(rd,prll(Rd,Rl));\n", + "Am=math.ceil(gm*Req);\n", + "Am2=Am*Am; #Voltage gain of two stage amplifier\n", + "print '%s %.f %s' %(\"Voltage gain of two stage amplifier=\",Am2,\"\\n\");\n", + "R_=prll(rd,Rd)+prll(Rg,rin);\n", + "f1=1./(2.*math.pi*Cc*R_); #lower cutoff frequency\n", + "f1_=f1/(math.sqrt(math.sqrt(2.)-1.));\n", + "f2=1./(2.*math.pi*Csh*Req); #upper cutoff frequency\n", + "f2_=f2*(math.sqrt(math.sqrt(2.)-1.));\n", + "BW=f2_-f1_;\n", + "print '%s %.f %s' %(\"Bandwidth=\",BW/1000.,\"kHz\\n\");\n", + "#There is a slight error in f1 due to use of R'(here R_)=479 kohm and in f2 due to approaximation of Req there is a slight variation\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Voltage gain of two stage amplifier= 324 \n", + "\n", + "Bandwidth= 115 kHz\n", + "\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E6 - Pg 298" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Calculate the midband voltage gain and bandwidth of cascade amplifier\n", + "#given\n", + "import math\n", + "Am=8.##midband voltage gain of individual MOSFET\n", + "BW=500.*10.**3.#Hz\n", + "f2=BW#\n", + "n=4.#\n", + "A2m=Am**n#\n", + "f2_=f2*(math.sqrt((2.**(1./n))-1.))#\n", + "print '%s %.f %s' %(\"Midband voltage gain =\",A2m,\"\\n\")#\n", + "print '%s %.1f %s' %(\"Overall Bandwidth =\",f2_/1000,\"kHz\")#\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Midband voltage gain = 4096 \n", + "\n", + "Overall Bandwidth = 217.5 kHz\n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Example E7 - Pg 298" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "#Calculate the input and output impedance and voltage gain\n", + "#FUNCTIONS\n", + "\n", + "def prll(r1,r2):\n", + "\tz=r1*r2/(r1+r2)#\n", + "\treturn z\n", + "\n", + "import math\n", + "hie=1.1*10.**3.;#ohm=rin\n", + "hfe=120.;#=B\n", + "#the values of Rac2, Zi, Zo are as per diagram\n", + "Rac2=prll(3.3*10**3,2.2*10**3);\n", + "Rac1=prll(6.8*10**3,prll(56*10**3,prll(5.6*10**3,1.1*10**3)));\n", + "Zi=prll(5.6*10**3,prll(56*10**3,1.1*10**3));\n", + "Zo=prll(3.3*10**3,2.2*10**3);\n", + "print '%s %.3f %s %s %.2f %s' %(\"Input Resistance =\",Zi/1000,\"kohm\\n\",\"\\nOutput Resistance =\",Zo/1000,\"kohm\");\n", + "Am2=-hfe*Rac2/(hie);\n", + "Am1=-hfe*Rac1/(hie);\n", + "Am=Am1*Am2;\n", + "Am=20.*math.log10(Am);\n", + "print '%s %.2f %s' %(\"\\nThe Overall Voltage gain is\",Am,\"dB\");\n" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Input Resistance = 0.905 kohm\n", + " \n", + "Output Resistance = 1.32 kohm\n", + "\n", + "The Overall Voltage gain is 81.97 dB\n" + ] + } + ], + "prompt_number": 7 + } + ], + "metadata": {} + } + ] +} \ No newline at end of file -- cgit