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-{
- "metadata": {
- "name": ""
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "CHAPTER 9 AC MODELS"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9-1, Page 289"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "import math\n",
- "\n",
- "f=20 #frequency(Hz)\n",
- "R=2 #Resistance(KOhm)\n",
- "\n",
- "XC=0.1*R #Capacitive reactance(Ohm)\n",
- "C=(1/(2*math.pi*f*XC))*1000 #Capacitance(uF)\n",
- "\n",
- "print 'Capacitance C = ',round(C,2),'uF'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Capacitance C = 39.79 uF\n"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9-2, Page 293"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "f=1 #frequency(KHz)\n",
- "R1=600 #Resistance1(Ohm)\n",
- "R2=1000 #Resistance2(Ohm)\n",
- "\n",
- "\n",
- "RTH=R1*R2/(R1+R2) #Thevenin resistance(Ohm)\n",
- "XC=0.1*RTH #Capacitive reactance(Ohm)\n",
- "C=(1/(2*math.pi*f*XC))*1000 #Capacitance(uF)\n",
- "\n",
- "print 'Capacitance C = ',round(C,2),'uF'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Capacitance C = 4.24 uF\n"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9-3, Page 297"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "VCC=10 #collector voltage(V)\n",
- "RE=1 #Emitter resistance(KOhm)\n",
- "VBE=0.7 #Base-emitter voltage drop(V)\n",
- "VEE=2 #Emitter supply voltage(V)\n",
- "\n",
- "IEQ=(VEE-VBE)/RE #Q point emitter current(mA)\n",
- "iepp=0.1*IEQ*1000 #small signal emitter current(uA) \n",
- "\n",
- "print 'Q point emitter current IEQ = ',IEQ,'mA'\n",
- "print 'Small signal emitter current iepp = ',iepp,'uApp'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Q point emitter current IEQ = 1.3 mA\n",
- "Small signal emitter current iepp = 130.0 uApp\n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9-4, Page 301"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "VCC=30 #Supply voltage(V)\n",
- "RC=5 #Collector resistance (KOhm)\n",
- "RL=100 #Emitter resistance (KOhm)\n",
- "RB=1 #Base resistance (MOhm)\n",
- "VBE=0.7 #Base-emitter voltage drop(V)\n",
- "Bdc=100 #current gain\n",
- "\n",
- "IB=(VCC-VBE)/RB #Base current(mA)\n",
- "IE=Bdc*IB/1000 #Emitter current(mA)\n",
- "re=25/IE #AC resistance(Ohm)\n",
- "\n",
- "print 'Emitter current IE = ',IE,'mA'\n",
- "print 'AC resistance re\\' = ',round(re,2),'Ohm'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Emitter current IE = 2.93 mA\n",
- "AC resistance re' = 8.53 Ohm\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9-5, Page 302"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "VCC=10 #collector voltage(V)\n",
- "RC=3.6 #Collector resistance (KOhm)\n",
- "RE=1 #Emitter resistance (KOhm)\n",
- "R1=10 #Base resistance1 (KOhm)\n",
- "R2=2.2 #Base resistance2 (KOhm)\n",
- "VBE=0.7 #Base-emitter voltage drop(V)\n",
- "\n",
- "VBB=(R2/(R1+R2))*VCC #Base voltage(V)\n",
- "VE=VBB-VBE #Emitter voltage(V)\n",
- "IE=VE/RE #Emitter current(mA)\n",
- "re=25/IE #AC resistance(Ohm)\n",
- "\n",
- "print 'Emitter current IE = ',round(IE,2),'mA'\n",
- "print 'AC resistance re\\' = ',round(re,2),'Ohm'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Emitter current IE = 1.1 mA\n",
- "AC resistance re' = 22.66 Ohm\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 9-6, Page 302"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "VCC=10 #collector voltage(V)\n",
- "RC=3.6 #Collector resistance (KOhm)\n",
- "RE=1 #Emitter resistance (KOhm)\n",
- "RB=2.7 #Base resistance (KOhm)\n",
- "VBE=0.7 #Base-emitter voltage drop(V)\n",
- "VEE=2 #emitter voltage(V)\n",
- "\n",
- "VE=VEE-VBE #Emitter to ground voltage(V)\n",
- "IE=VE/RE #Emitter current(mA)\n",
- "re=25/IE #AC resistance(Ohm)\n",
- "\n",
- "print 'Emitter current IE = ',IE,'mA'\n",
- "print 'AC resistance re\\' = ',round(re,2),'Ohm'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Emitter current IE = 1.3 mA\n",
- "AC resistance re' = 19.23 Ohm\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [],
- "language": "python",
- "metadata": {},
- "outputs": []
- }
- ],
- "metadata": {}
- }
- ]
-} \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-01-09 13:28:53 +0000