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+{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:31dcf77e65a826bbecccd0c8b7094f24a045faabd3e68c38af8ed1add965bf7a"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter-4 : Bipolar Junction & Field Effect Transistors"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.1, p-175"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "VGS=10 #in Volt\n",
+ "IG=0.001 #in uAmpere\n",
+ "IG=IG*10**-6 #in Ampere\n",
+ "RGS=VGS/IG #in Ohm\n",
+ "RGS*=10**-6 #Mohm\n",
+ "print \"Resistance between gate and source is\",round(RGS,2),\"Mohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Resistance between gate and source is 10000.0 Mohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.2, p-176"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "delVDS=1.5 #in Volt\n",
+ "delID=120 #in uAmpere\n",
+ "delID=delID*10**-6 #in Ampere\n",
+ "rd=delVDS/delID #in Ohm\n",
+ "rd*=10**-3 # Mohm\n",
+ "print \"AC drain Resistance of JFET is\",round(rd,2),\"Kohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "AC drain Resistance of JFET is 12.5 Kohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.3, p-179"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "ID2=1.5 #in mAmpere\n",
+ "ID1=1.2 #in mAmpere\n",
+ "delID=ID2-ID1 #in Ampere\n",
+ "VGS1=-4.25 #in Volt\n",
+ "VGS2=-4.10 #in Volt\n",
+ "delVGS=VGS2-VGS1 #in Volt\n",
+ "gm=delID/delVGS #in Ohm\n",
+ "print \"Transconductance is\",round(gm,2),\"mA/V\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Transconductance is 2.0 mA/V\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.4, p-182"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "VDS1=5 #in Volt\n",
+ "VDS2=12 #in Volt\n",
+ "VDS3=12 #in Volt\n",
+ "VGS1=0 #in Volt\n",
+ "VGS2=0 #in Volt\n",
+ "VGS3=-0.25 #in Volt\n",
+ "ID1=8 #in mAmpere\n",
+ "ID2=8.2 #in mAmpere\n",
+ "ID3=7.5 #in mAmpere\n",
+ "#AC drain resistance\n",
+ "delVDS=VDS2-VDS1 #in Volt\n",
+ "delID=ID2-ID1 #in mAmpere\n",
+ "rd=delVDS/delID #in Kohm\n",
+ "print \"AC Drain resistance is\",round(rd,2),\"Kohm\"\n",
+ "#Transconductance\n",
+ "delID=ID3-ID2 #in mAmpere\n",
+ "delVGS=VGS3-VGS2 #in Volt\n",
+ "gm=delID/delVGS #in mA/V or mS\n",
+ "print \"Transconductance is\",round(gm,2),\"mA/V\"\n",
+ "#Amplification Factor\n",
+ "meu=rd*1000*gm*10**-3 #unitless\n",
+ "print \"Amplification Factor is\",round(meu,2) "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "AC Drain resistance is 35.0 Kohm\n",
+ "Transconductance is 2.8 mA/V\n",
+ "Amplification Factor is 98.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.5, p-188"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "from __future__ import division\n",
+ "from math import sqrt\n",
+ "#given data :\n",
+ "VP=-4.5 #in Volt\n",
+ "IDSS=10 #in mAmpere\n",
+ "IDS=2.5 #in mAmpere\n",
+ "#Formula : IDS=IDSS*[1-VGS/VP]**2\n",
+ "VGS=VP*(1-sqrt(IDS/IDSS)) #in Volt\n",
+ "gm=(-2*IDSS*10**-3)*(1-VGS/VP)/VP #in A/V\n",
+ "gm*=1000 # mA/V\n",
+ "print \"Transconductance is\",round(gm,2),\"mA/V\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " Transconductance is 2.22 mA/V\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.6, p-192"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "gm=10 #in mS\n",
+ "gm=gm*10**-3 #in S\n",
+ "IDSS=10 #in uAmpere\n",
+ "IDSS=IDSS*10**-6 #in Ampere\n",
+ "#VGS(OFF):VGS=VP\n",
+ "#Formula : gm=gmo=-2*IDSS/VP=-2*IDSS/VG(Off)\n",
+ "VGS_OFF=-2*IDSS/gm #in Volt\n",
+ "VGS_OFF*=1000 # mV\n",
+ "print \"VGS(OFF) is\",round(VGS_OFF),\"mV\" "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "VGS(OFF) is -2.0 mV\n"
+ ]
+ }
+ ],
+ "prompt_number": 13
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.7, p-195"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "VP=-4 #in Volt\n",
+ "VGS=-2 #in Volt\n",
+ "IDSS=10 #in mAmpere\n",
+ "IDSS=IDSS*10**-3 #in Ampere\n",
+ "#Formula : ID=IDSS*[1-VGS/VP]**2\n",
+ "ID=IDSS*(1-VGS/VP)**2 #in Ampere\n",
+ "ID*=1000 #mA\n",
+ "print \"Drain Current is\",round(ID,2),\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Drain Current is 2.5 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 17
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.8, p-206"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "IDSS=8.7 #in mAmpere\n",
+ "IDSS=IDSS*10**-3 #in Ampere\n",
+ "VP=-3 #in Volt\n",
+ "VGS=-1 #in Volt\n",
+ "#ID\n",
+ "ID=IDSS*(1-VGS/VP)**2\n",
+ "ID*=1000 #mA\n",
+ "print \"Drain current ID is\",round(ID,2),\"mA\"\n",
+ "#gmo\n",
+ "gmo=-2*IDSS/VP #in S\n",
+ "gmo*=1000 # mA/V or mS\n",
+ "print \"Transconductance for VGS=0V is\",round(gmo,2),\"mA/V or mS\"\n",
+ "#gm\n",
+ "gm=gmo*(1-VGS/VP) #in S\n",
+ "gm*=1000 # mA/V or mS\n",
+ "print \"Transconductance is\",round(gm,2),\"mA/V or mS\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Drain current ID is 3.87 mA\n",
+ "Transconductance for VGS=0V is 5.8 mA/V or mS\n",
+ "Transconductance is 3866.67 mA/V or mS\n"
+ ]
+ }
+ ],
+ "prompt_number": 18
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Ex 4.9, p-209"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": true,
+ "input": [
+ "from __future__ import division\n",
+ "#given data :\n",
+ "IDSS=8.4 #in mAmpere\n",
+ "IDSS=IDSS*10**-3 #in Ampere\n",
+ "VP=-3 #in Volt\n",
+ "VGS=-1.5 #in Volt\n",
+ "#ID\n",
+ "ID=IDSS*array(1-VGS/VP)**2\n",
+ "ID*=1000 # mA\n",
+ "print \"Drain current ID is\",round(ID,2),\"mA\"\n",
+ "#gmo\n",
+ "gmo=-2*IDSS/VP #in S\n",
+ "gmo*=1000 #mS\n",
+ "print \"Transconductance for VGS=0V is\",round(gmo,2),\"mA/V or mS\"\n",
+ "gm=gmo*(1-VGS/VP) #in S\n",
+ "gm*=1000 #mS\n",
+ "print \"Transconductance is\",round(gm,2),\"mA/V or mS\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Drain current ID is 2.1 mA\n",
+ "Transconductance for VGS=0V is 5.6 mA/V or mS\n",
+ "Transconductance is 2800.0 mA/V or mS\n"
+ ]
+ }
+ ],
+ "prompt_number": 21
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-21 10:06:30 +0000