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+{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 6: Bipolar junction Transistors"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.1 page No.215"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "Ic=9.95\t\t\t#in mA\n",
+ "Ie=10 \t\t#in mA\n",
+ "\n",
+ "Ib=Ie-Ic\t\t#in mA\n",
+ "\n",
+ "print\"Emitter current is \",Ib,\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Emitter current is 0.05 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.2 page No. 216"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "IC=0.98\t\t\t#in mA\n",
+ "IB=20.0\t\t\t#in uA\n",
+ "IB=IB*10**-3\t\t#in mA\n",
+ "\n",
+ "IE=IB+IC\t\t#in mA\n",
+ "\n",
+ "alpha=IC/IE\t\t#unitless\n",
+ "Beta=IC/IB\t\t#unitless\n",
+ "\n",
+ "print\"Emitter current is\",IE,\"mA\"\n",
+ "print\"Current amplification factor is \",alpha\n",
+ "print\"Current gain factor is \",Beta"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Emitter current is 1.0 mA\n",
+ "Current amplification factor is 0.98\n",
+ "Current gain factor is 49.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 13
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.3 page No.216"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "alfaDC=0.98\t\t\t#unitless\n",
+ "ICBO=4\t\t\t\t#in uA\n",
+ "ICBO=ICBO*10**-3\t\t#in mA\n",
+ "IB=50\t\t\t\t#in uA\n",
+ "IB=IB*10**-3\t\t\t#in mA\n",
+ "\n",
+ "IC=alfaDC*IB/(1-alfaDC)+ICBO/(1-alfaDC)\t#in mA\n",
+ "IE=IC+IB\t\t\t#in mA\n",
+ "\n",
+ "print\"Emitter current is \",IE,\"mA\"\n",
+ "print\"Collector current is \",IC,\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Emitter current is 2.7 mA\n",
+ "Collector current is 2.65 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 16
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.4 page No. 216"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "IB=10\t\t\t#in uA\n",
+ "IB=IB*10**-3\t\t#in mA\n",
+ "Beta=99\t\t\t#Unitless\n",
+ "ICO=1\t\t\t#in uA\n",
+ "ICO=ICO*10**-3\t\t#in mA\n",
+ "\n",
+ "IC=Beta*IB+(1+Beta)*ICO\t#in mA\n",
+ "\n",
+ "print\"Collector current in mA : \",IC,\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Collector current in mA : 1.09 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 17
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.5 Page No.216"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "Ic=5*10**-3 #mA collector current\n",
+ "Ic_=10*10**-3 #mA collector current\n",
+ "Ib=50*10**-6 #mA, Base current\n",
+ "Icbo=1*10**-6 #micro A, Current to base open current\n",
+ "\n",
+ "beta=(Ic-Icbo)/(Ib+Icbo)\n",
+ "alpha=(beta/(1+beta))\n",
+ "Ie=Ib+Ic\n",
+ "\n",
+ "Ib=(Ic_-(beta+1)*Icbo)/(beta)\n",
+ "\n",
+ "print\"(i) Current gain factor is\",round(beta,0)\n",
+ "print\" Current amplification factor is\",round(alpha,2)\n",
+ "print\" Emitter Current is\",Ie*1000,\"mA\"\n",
+ "print\"(ii)New level of Ib is\",round(Ib*10**6,0),\"micro A\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i) Current gain factor is 98.0\n",
+ " Current amplification factor is 0.99\n",
+ " Emitter Current is 5.05 mA\n",
+ "(ii)New level of Ib is 101.0 micro A\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.6 page No. 222"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "delVEB=200\t\t\t#in Volts\n",
+ "delIE=5\t\t\t\t#in mA\n",
+ "\n",
+ "rin=delVEB/delIE\t\t#in ohm\n",
+ "\n",
+ "print\"Dynamic input resistance is \",rin,\"mohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Dynamic input resistance is 40 mohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 18
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.7 page No. 222"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "\n",
+ "ICBO=12.5 \t\t\t#in uA\n",
+ "ICBO=ICBO*10**-3 \t\t#in mA\n",
+ "IE=2 \t\t\t\t#in mA\n",
+ "IC=1.97 \t\t\t#in mA\n",
+ "\n",
+ "alfa=(IC-ICBO)/IE \t\t#unitless\n",
+ "IB=IE-IC \t\t\t#in mA\n",
+ "\n",
+ "print\"Current gain : \",round(alfa,3)\n",
+ "print\"Base current is \",IB,\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Current gain : 0.979\n",
+ "Base current is 0.03 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 32
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.8 page No. 222"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "RL=4.0 \t\t\t#in Kohm\n",
+ "VL=3.0\t\t\t#in volt\n",
+ "alfa=0.96 \t\t#unitless\n",
+ "IC=VL/RL \t\t#in mA\n",
+ "\n",
+ "IE=IC/alfa \t\t#in mA\n",
+ "IB=IE-IC \t\t#in mA\n",
+ "\n",
+ "print\"Base current ia\",round(IB,2),\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Base current ia 0.03 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 37
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.9 page No.227"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "VCC=10\t\t\t #in volt\n",
+ "RL=800\t\t\t #in ohm\n",
+ "VL=0.8\t\t\t #in volt\n",
+ "alfa=0.96\t\t #unitless\n",
+ "\n",
+ "VCE=VCC-VL \t\t#in Volt\n",
+ "IC=VL*1000/RL \t\t#in mA\n",
+ "Beta=alfa/(1-alfa) \t#unitless\n",
+ "IB=IC/Beta \t\t#in mA\n",
+ "\n",
+ "print\"Collector-emitter Voltage is \",VCE,\"V\"\n",
+ "print\"Base current in uA : \",round(IB*1000,2),\"microA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Collector-emitter Voltage is 9.2 V\n",
+ "Base current in uA : 41.67 microA\n"
+ ]
+ }
+ ],
+ "prompt_number": 41
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.10 page No. 227"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "alfao=0.98 \t\t#unitless\n",
+ "ICO=10 \t\t\t#in uA\n",
+ "ICO=ICO*10**-3 \t\t#in mA\n",
+ "IB=0.22 \t\t#in mA\n",
+ "\n",
+ "IC=(alfao*IB+ICO)/(1-alfao) \t#in mA\n",
+ "\n",
+ "print\"Collector current is\",IC,\"mA\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Collector current is 11.28 mA\n"
+ ]
+ }
+ ],
+ "prompt_number": 45
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.11 page No. 228"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "delVEB=250 \t\t#in mVolts\n",
+ "delIE=1 \t\t#in mA\n",
+ "\n",
+ "rin=delVEB/delIE \t#in ohm\n",
+ "\n",
+ "print\"Dynamic input resistance is\",rin,\"ohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Dynamic input resistance is 250 ohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 47
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.12 page No. 228"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "delVCE=10-5 \t\t#in Volts\n",
+ "delIC=5.8-5\t \t#in mA\n",
+ "\n",
+ "rin=delVCE/delIC \t#in Kohm\n",
+ "\n",
+ "print\"Dynamic output resistance is \",rin,\"kohm\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Dynamic output resistance is 6.25 kohm\n"
+ ]
+ }
+ ],
+ "prompt_number": 49
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 6.16 page No. 233"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "Beta=45 \t\t\t#Unitless\n",
+ "VBE=0.7 \t\t\t#in Volt\n",
+ "VCC=0 \t\t\t\t#in Volt\n",
+ "RB=10**5 \t\t\t#in ohm\n",
+ "RC=1.2*10**3 \t\t\t#in ohm\n",
+ "VEE=-9 \t\t\t\t#in Volt\n",
+ "\n",
+ "IB=-(VBE+VEE)/RB \t\t#in mA\n",
+ "IC=Beta*IB \t\t\t#in mA\n",
+ "VC=VCC-IC*RC \t\t\t#in Volts\n",
+ "VB=VBE+VEE \t\t\t#in Volts\n",
+ "\n",
+ "print\"collector voltage is \",round(VC,1),\"V\"\n",
+ "print\"Base voltage is \",VB,\"V\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "collector voltage is -4.5 V\n",
+ "Base voltage is -8.3 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 60
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-20 18:28:50 +0000