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-{
- "metadata": {
- "name": ""
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "CHAPTER 3 DIODE THEORY"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-2, Page 63"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "Pr=5 #Power rating(W)\n",
- "Vd=1.2 #diode voltage(V)\n",
- "Id=1.75 #diode current(A)\n",
- "\n",
- "PD=Vd*Id #Power dissipaion(W)\n",
- "\n",
- "print 'Power Dissipation =',PD,'W'\n",
- "print 'PD(',PD,'W) < ''Pr(',Pr,'W), So diode will not be destroyed.'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Power Dissipation = 2.1 W\n",
- "PD( 2.1 W) < Pr( 5 W), So diode will not be destroyed.\n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-3, Page 65"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "\n",
- "Vs=10 #Source voltage(V)\n",
- "RL=1 #Load resistance(KOhm)\n",
- "VL=Vs #LOad voltage(V)\n",
- "\n",
- "IL=VL/RL #Load current(mA)\n",
- "\n",
- "print 'Vs will be appearing across RL'\n",
- "print 'Load voltage VL =',Vs,'V'\n",
- "print 'Load current IL =',IL,'mA'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Vs will be appearing across RL\n",
- "Load voltage VL = 10 V\n",
- "Load current IL = 10 mA\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-4, Page 65"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "print 'As per figure 3-6b, Thevenize the circuit to the left of the diode'\n",
- "R1=6 #Resistance(KOhm)\n",
- "R2=3 #Resistance(KOhm)\n",
- "RL=1 #Load Resistance(KOhm)\n",
- "Vs=36 #Supply voltage(V)\n",
- "\n",
- "Vth=R2*Vs/(R1+R2) #ThCevenin voltage(V)\n",
- "Rth=(R1*R2)/(R1+R2) #Thevenin resistance(KOhm)\n",
- "Rt=Rth+RL #total resistance(KOhm)\n",
- "IL=Vth/Rt #Load current(mA)\n",
- "VL=IL*RL #Load voltage(V)\n",
- "\n",
- "print 'Vth =',Vth,'V & Rth =',Rth,'KOhm'\n",
- "print 'Visualize diode as closed switch,'\n",
- "print 'IL =',IL,'mA'\n",
- "print 'VL =',VL,'V'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "As per figure 3-6b, Thevenize the circuit to the left of the diode\n",
- "Vth = 12 V & Rth = 2 KOhm\n",
- "Visualize diode as closed switch,\n",
- "IL = 4 mA\n",
- "VL = 4 V\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-5, Page 67"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "print 'As per Second approximation in Fig.3-8,'\n",
- "Vd=0.7 #diode voltgage(V)\n",
- "Vs=10 #supply voltage(V)\n",
- "RL=1 #Load resistance(KOhm)\n",
- "\n",
- "VL=Vs-Vd #Load voltage(v)\n",
- "IL=VL/RL #Load current(mA)\n",
- "PD=Vd*IL #diode power(mW)\n",
- "\n",
- "print 'IL =',IL,'mA & VL =',VL,'V'\n",
- "print 'Diode power PD =',PD,'mW'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "As per Second approximation in Fig.3-8,\n",
- "IL = 9.3 mA & VL = 9.3 V\n",
- "Diode power PD = 6.51 mW\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-6, Page 67"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "print 'As per Second approximation in Fig.3-9a,'\n",
- "Vd=0.7 #diode voltgage(V)\n",
- "Vs=36 #supply voltage(V)\n",
- "R1=6 #Resistance(KOhm)\n",
- "R2=3 #Resistance(KOhm)\n",
- "RL=1 #Load resistance(KOhm)\n",
- "\n",
- "Vth=R2*Vs/(R1+R2)#Thevenin Voltage(V)\n",
- "Rth=(R1*R2)/(R1+R2)#Thevenin resistance(KOhm)\n",
- "IL=(Vth-Vd)/R2#Load current(mA)\n",
- "VL=IL*RL#Load voltage(V)\n",
- "PD=Vd*IL#diode power(mW)\n",
- "\n",
- "print 'Thevenize the circuit to the left of the diode'\n",
- "print 'Vth =',Vth,'V & Rth =',Rth,'KOhm'\n",
- "print 'VL =',round(VL,2),'V & IL =',round(IL,2),'mA'\n",
- "print 'Diode power PD =',round(PD,2),'mW'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "As per Second approximation in Fig.3-9a,\n",
- "Thevenize the circuit to the left of the diode\n",
- "Vth = 12 V & Rth = 2 KOhm\n",
- "VL = 3.77 V & IL = 3.77 mA\n",
- "Diode power PD = 2.64 mW\n"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-7, Page 68"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "print 'In Fig.3-11a,'\n",
- "Vd=0.7 #diode voltgage(V)\n",
- "Vs=10 #supply voltage(V)\n",
- "RL=1000L #Load resistance(Ohm)\n",
- "Rb=0.23 #bulk resistance\n",
- "\n",
- "print 'As per third approximation, we get fig.3-11b'\n",
- "if Rb<(RL/100):\n",
- " print'If Rb < 0.01RL than ignore Rb & use second approximation.'\n",
- " VL=Vs-Vd #Load voltage(V)\n",
- " IL=(VL/RL)*1000 #Load current(mA)\n",
- " PD=Vd*IL #diode power(mW)\n",
- "\n",
- " print 'IL =',IL,'mA & VL =',VL,'V'\n",
- " print 'Diode power PD =',PD,'mW'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "In Fig.3-11a,\n",
- "As per third approximation, we get fig.3-11b\n",
- "If Rb < 0.01RL than ignore Rb & use second approximation.\n",
- "IL = 9.3 mA & VL = 9.3 V\n",
- "Diode power PD = 6.51 mW\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 3-8, Page 69"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "print 'In Fig.3-11a, take RL = 10 Ohm'\n",
- "Vd=0.7 #diode voltgage(V)\n",
- "Vs=10 #supply voltage(V)\n",
- "RL=10 #Load resistance(Ohm)\n",
- "Rb=0.23 #bulk resistance\n",
- "RT=Rb+RL #Total reistance(Ohm)\n",
- "VT=Vs-Vd #total voltage(V)\n",
- "\n",
- "print 'RT =',RT,'Ohm & VT =',VT,'V'\n",
- "IL=VT/RT #Load current(mA)\n",
- "VL=IL*RL #Load voltage(V)\n",
- "VD=Vd+(IL*Rb) \n",
- "PD=VD*IL #diode power(W)\n",
- "\n",
- "print 'IL =',round(IL,2),'mA & VL =',round(VL,2),'V'\n",
- "print 'VD =',round(VD,2),'V'\n",
- "print 'Diode power PD =',round(PD,2),'W'"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "In Fig.3-11a, take RL = 10 Ohm\n",
- "RT = 10.23 Ohm & VT = 9.3 V\n",
- "IL = 0.91 mA & VL = 9.09 V\n",
- "VD = 0.91 V\n",
- "Diode power PD = 0.83 W\n"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "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 13:03:13 +0000