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+{
+ "metadata": {
+ "name": "Chapter_5"
+ },
+ "nbformat": 2,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h1>Chapter 5: Transistor Bias Circuits<h1>"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.1, Page Number: 146<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "%pylab inline"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Welcome to pylab, a matplotlib-based Python environment [backend: module://IPython.zmq.pylab.backend_inline].",
+ "For more information, type 'help(pylab)'."
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "V_BB=10.0; #voltage in volt",
+ "V_CC=20.0; #voltage in volt",
+ "B_DC=200.0; #B_DC value",
+ "R_B=47.0*10**3; #resistance in ohm",
+ "R_C=330.0; #resistance in ohm",
+ "V_BE=0.7; #voltage in volt",
+ "",
+ "#current",
+ "I_B=(V_BB-V_BE)/R_B; #base current",
+ "I_C=B_DC*I_B; #Q POINT",
+ "V_CE=V_CC-I_C*R_C; #Q POINT",
+ "I_C_sat=V_CC/R_C; #saturation current",
+ "I_c_peak=I_C_sat-I_C; #peak current ",
+ "I_b_peak=I_c_peak/B_DC; #peak current in ampere",
+ "",
+ "#result",
+ "print \"Q point of I_C = %.3f amperes\" %I_C",
+ "print \"Q point of V_CE = %.2f volts\" %V_CE",
+ "print \"peak base current = %.4f amperes\" %I_b_peak"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Q point of I_C = 0.040 amperes",
+ "Q point of V_CE = 6.94 volts",
+ "peak base current = 0.0001 amperes"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.2, Page Number: 149<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "B_DC=125.0; #DC value",
+ "R_E=10.0**3; #resistance in ohm",
+ "",
+ "#calculation",
+ "R_IN_base=B_DC*R_E; #base resistance",
+ "",
+ "#Result",
+ "print \"DC input resistance, looking at base of transistor = %d ohm\" %R_IN_base"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "DC input resistance, looking at base of transistor = 125000 ohm"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.3, Page Number: 151<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "B_DC=100; #DC value",
+ "R1=10*10**3; #resistance in ohm",
+ "R2=5.6*10**3; #resistance in ohm",
+ "R_C=1*10**3; #resistance in ohm",
+ "R_E=560; #resistance in ohm",
+ "V_CC=10; #voltage in volt",
+ "V_BE=0.7 #voltage in volt",
+ "",
+ "#calculation",
+ "R_IN_base=B_DC*R_E; #calculate base resistance",
+ "#We can neglect R_IN_base as it is equal to 10*R2",
+ "print \"input resistance seen from base = %d ohm\" %R_IN_base",
+ "print \"which can be neglected as it is 10 times R2\"",
+ "",
+ "V_B=(R2/(R1+R2))*V_CC; #base voltage",
+ "V_E=V_B-V_BE; #emitter voltage",
+ "I_E=V_E/R_E; #emitter current",
+ "I_C=I_E; #currents are equal",
+ "V_CE=V_CC-I_C*(R_C+R_E); #voltage in volt",
+ "",
+ "#result",
+ "print \"V_CE = %.2f volts\" %V_CE",
+ "print \"I_C = %.3f amperes\" %I_C",
+ "print \"Since V_CE>0V, transistor is not in saturation\""
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "input resistance seen from base = 56000 ohm",
+ "which can be neglected as it is 10 times R2",
+ "V_CE = 1.95 volts",
+ "I_C = 0.005 amperes",
+ "Since V_CE>0V, transistor is not in saturation"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.4, Page Number: 154<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "V_EE=10.0; #voltage in volt",
+ "V_BE=0.7; #voltage in volt",
+ "B_DC=150.0; #DC value ",
+ "R1=22.0*10**3; #resistance in ohm",
+ "R2=10.0*10**3; #resistance in ohm",
+ "R_C=2.2*10**3; #resistance in ohm",
+ "R_E=1.0*10**3; #resistance in ohm",
+ "",
+ "#calculation",
+ "R_IN_base=B_DC*R_E; #R_IN_base>10*R2,so it can be neglected",
+ "print \"input resistance as seen from base = %d ohm\" %R_IN_base",
+ "print \"it can be neglected as it is greater than 10 times R2\"",
+ "V_B=(R1/(R1+R2))*V_EE; #base voltage",
+ "V_E=V_B+V_BE; #emitter voltage",
+ "I_E=(V_EE-V_E)/R_E; #emitter current",
+ "I_C=I_E; #currents are equal",
+ "V_C=I_C*R_C; #collector voltage",
+ "V_EC=V_E-V_C; #emitter-collector voltage",
+ "",
+ "#result",
+ "print \"I_C collector current = %.4f amperes\" %I_C",
+ "print \"V_EC emitter-collector voltage = %.2f Volts\" %V_EC"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "input resistance as seen from base = 150000 ohm",
+ "it can be neglected as it is greater than 10 times R2",
+ "I_C collector current = 0.0024 amperes",
+ "V_EC emitter-collector voltage = 2.24 Volts"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.5, PAge Number: 154<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "R1=68.0*10**3; #resistance in ohm",
+ "R2=47.0*10**3; #resistance in ohm",
+ "R_C=1.8*10**3; #resistance in ohm",
+ "R_E=2.2*10**3; #resistance in ohm",
+ "V_CC=-6.0; #voltage in volt",
+ "V_BE=0.7; #voltage in volt",
+ "B_DC=75.0; #DC value",
+ "",
+ "#calculation",
+ "R_IN_base=B_DC*R_E;",
+ "print \"input resistance as seen from base\"",
+ "print \"is not greater than 10 times R2 so it should be taken into account\"",
+ "#R_IN_base in parallel with R2",
+ "V_B=((R2*R_IN_base)/(R2+R_IN_base)/(R1+(R2*R_IN_base)/(R2+R_IN_base)))*V_CC;",
+ "V_E=V_B+V_BE; #emitter voltage",
+ "I_E=V_E/R_E; #emitter current",
+ "I_C=I_E; #currents are equal",
+ "V_C=V_CC-I_C*R_C; #collector voltage",
+ "V_CE=V_C-V_E; #collector-emitter voltage",
+ "",
+ "#result",
+ "print \"collector current = %.4f amperes\" %I_C",
+ "print \"collector emitter voltage = %.2f volts\" %V_CE"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "input resistance as seen from base",
+ "is not greater than 10 times R2 so it should be taken into account",
+ "collector current = -0.0006 amperes",
+ "collector emitter voltage = -3.46 volts"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.6, Page Number: 156<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "V_CC=12.0; #voltage in volt",
+ "R_B=100.0*10**3; #resistance in ohm",
+ "R_C=560.0; #resistance in ohm",
+ "#FOR B_DC=85 AND V_BE=0.7V",
+ "B_DC=85.0; #DC value",
+ "V_BE=0.7; #base-emitter voltage",
+ "",
+ "#calculation",
+ "I_C_1=B_DC*(V_CC-V_BE)/R_B; #collector current",
+ "V_CE_1=V_CC-I_C_1*R_C; #collector-emittor voltage",
+ "#FOR B_DC=100 AND V_BE=0.6V",
+ "B_DC=100.0; #DC value ",
+ "V_BE=0.6; #base emitter voltage",
+ "I_C_2=B_DC*(V_CC-V_BE)/R_B; #collector current",
+ "V_CE_2=V_CC-I_C_2*R_C; #voltage in volt",
+ "p_del_I_C=((I_C_2-I_C_1)/I_C_1)*100; #percent change in collector current ",
+ "p_del_V_CE=((V_CE_2-V_CE_1)/V_CE_1)*100; #percent change in C-E voltage",
+ "",
+ "#result",
+ "print \"percent change in collector current = %.2f\" %p_del_I_C",
+ "print \"percent change in collector emitter voltage = %.2f\" %p_del_V_CE"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "percent change in collector current = 18.69",
+ "percent change in collector emitter voltage = -15.18"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.7, Page Number: 159<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaration",
+ "V_CC=20.0; #voltage in volt",
+ "R_C=4.7*10**3; #resistance in ohm",
+ "R_E=10.0*10**3; #resistance in ohm",
+ "V_EE=-20.0; #voltage in volt",
+ "R_B=100*10**3; #resistance in ohm",
+ "#FOR B_DC=85 AND V_BE=0.7V",
+ "B_DC=85; #DC value",
+ "V_BE=0.7; #base-emitter voltage",
+ "I_C_1=(-V_EE-V_BE)/(R_E+(R_B/B_DC));",
+ "V_C=V_CC-I_C_1*R_C; #colector voltage",
+ "I_E=I_C_1; #emittor current",
+ "V_E=V_EE+I_E*R_E; #emittor voltage",
+ "V_CE_1=V_C-V_E; #CE voltage",
+ "print \"I_C_1 = %.3f\" %I_C_1",
+ "print \"V_CE_1 = %.2f\" %V_CE_1",
+ "#FOR B_DC=100 AND V_BE=0.6V",
+ "B_DC=100; #DC value ",
+ "V_BE=0.6; #base-emitter voltage",
+ "I_C_2=(-V_EE-V_BE)/(R_E+(R_B/B_DC));",
+ "V_C=V_CC-I_C_2*R_C;#colector voltage",
+ "I_E=I_C_2; #emittor current",
+ "V_E=V_EE+I_E*R_E; #emittor voltage",
+ "V_CE_2=V_C-V_E; #CE voltage",
+ "print \"I_C_2 = %.3f\" %I_C_2",
+ "print \"V_CE_2 = %.2f\" %V_CE_2",
+ "",
+ "p_del_I_C=((I_C_2-I_C_1)/I_C_1)*100;",
+ "p_del_V_CE=((V_CE_2-V_CE_1)/V_CE_1)*100;",
+ "print \"percent change in collector currrent = %.2f\" %p_del_I_C",
+ "print \"percent change in collector emitter voltage = %.2f\" %p_del_V_CE",
+ "print \"answers in book are approximated\""
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "I_C_1 = 0.002",
+ "V_CE_1 = 14.61",
+ "I_C_2 = 0.002",
+ "V_CE_2 = 14.07",
+ "percent change in collector currrent = 2.13",
+ "percent change in collector emitter voltage = -3.69",
+ "answers in book are approximated"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 5.8, Page Number: 161<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "",
+ "# variable declaratio",
+ "V_CC=10.0; #voltage in volt",
+ "B_DC=100.0; #Dc value",
+ "R_C=10.0*10**3; #resistance in ohm",
+ "R_B=100.0*10**3; #resistance in ohm",
+ "V_BE=0.7; #base-emittor voltage",
+ "",
+ "#calculation",
+ "I_C=(V_CC-V_BE)/(R_C+(R_B/B_DC)); #collector current",
+ "V_CE=V_CC-I_C*R_C; #CE voltage",
+ "",
+ "#result",
+ "print \"Q point of collector current %.4f amperes\" %I_C",
+ "print \"Q point of collector-emitter voltage %.3f volts\" %V_CE"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Q point of collector current 0.0008 amperes",
+ "Q point of collector-emitter voltage 1.545 volts"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ }
+ ]
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-20 17:19:54 +0000