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+{
+ "metadata": {
+ "name": "ch_10"
+ },
+ "nbformat": 2,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h1>Chapter 10: Phase locked loop<h1>"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example 10.1, Page No: 429<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''DC Control voltage'''",
+ "",
+ "#Variable Declaration:",
+ "fs=20000.0 #Signal frequency in hertz",
+ "fr=21000.0 #Free running frquency in hertz",
+ "VCOf=4000.0 #V/F transfer coefficient of VCO in Khz/V",
+ "",
+ "#Calculation:",
+ "Vcd=(fr-fs)/VCOf #Calculating change in DC control voltage",
+ "",
+ "#Result:",
+ "print('Vcd= %.2f V'%Vcd)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Vcd= 0.25 V"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example No. 10.2, Page No: 430<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''VCO Circuit'''",
+ "",
+ "",
+ "#Part A",
+ "#Variable Ceclaration:",
+ "R1=15.0*10**3 #Resistance in ohm",
+ "R3=15.0*10**3 #Resistance in ohm",
+ "R2=2.2*10**3 #Resistance in ohm",
+ "C1=0.001*10**-6 #Capacitance in farad",
+ "Vcc=12.0 #Voltage in volt",
+ "",
+ "#Calculations:",
+ "Vc=Vcc*(R3/(R2+R3)) #Calculating volatage in Vc",
+ "fo1=2*(Vcc-Vc)/(C1*R1*Vcc) #Calculating frequency",
+ "fo1n=fo1/1000.0 #Calculating frequency",
+ "",
+ "#Results:",
+ "print('\\nVc= %.3f V'%Vc)",
+ "print('\\nFo= %.2f kHz'%fo1n)",
+ "",
+ "#Part B",
+ "#Variable Declaration:",
+ "Vc1=7.0",
+ "Vc2=8.0",
+ "",
+ "#Calculation:",
+ "fo2=2*(Vcc-Vc1)/(C1*R1*Vcc) #Calculating frequency",
+ "fo2n=fo2/1000.0 #Calculating frequency",
+ "",
+ "fo3=2*(Vcc-Vc2)/(C1*R1*Vcc) #Calculating frequency",
+ "fo3n=fo3/1000.0 #Calculating frequency",
+ "",
+ "fch=fo2n-fo3n #Calculating chane in output frequency",
+ " ",
+ "#Results:",
+ "print('\\nFo= %.3f kHz'%fo2n)",
+ "print('\\nFo= %.3f kHz'%fo3n)",
+ "print('\\nChange in output frequency= %.3f kHz'%fch)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Vc= 10.465 V",
+ "",
+ "Fo= 17.05 kHz",
+ "",
+ "Fo= 55.556 kHz",
+ "",
+ "Fo= 44.444 kHz",
+ "",
+ "Change in output frequency= 11.111 kHz"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example No. 10.3, Page No: 438<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''PLL565'''",
+ "",
+ "#Variable Declaration:",
+ "import math",
+ "fo=100.0*10**3 #Frequency in hertz",
+ "C=2.0*10**-6 #Capacitance in farad",
+ "Vcc=6.0 #Voltage in volt",
+ "",
+ "#Calculations:",
+ "fld=7.8*fo/(2*Vcc) #Calculating lock frequency",
+ "fldn=fld/1000.0 #Calculating lock frequency",
+ "LR=2.0*fldn #Calculating lock range",
+ "",
+ "fcd=math.sqrt(fld/(C*2*math.pi*3.6*10**3))#Calculating capture frequency ",
+ "fcdn=fcd/1000.0 #Calculating capture frequency",
+ "CR=2*fcdn #Calculating capature range ",
+ "",
+ "R1=12.0*10**3",
+ "C1=1.2/(4*R1*fo) #Calculating value of capacitance ",
+ "C1n=C1*10**12 #Calculating value of capacitance",
+ "",
+ "#Results:",
+ "print('\\nDelta FL= +/- %d kHz'%fldn)",
+ "print('\\nLock Range= %d kHz'%LR)",
+ "print('\\nDelta FC= +/- %.3f kHz'%fcdn)",
+ "print('\\nCapture Range= %.3f kHz'%CR)",
+ "print('\\nC1= %d pF'%C1n)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Delta FL= +/- 65 kHz",
+ "",
+ "Lock Range= 130 kHz",
+ "",
+ "Delta FC= +/- 1.199 kHz",
+ "",
+ "Capture Range= 2.397 kHz",
+ "",
+ "C1= 250 pF"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example No. 10.4, Page No: 438<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''IC565'''",
+ "",
+ "#Variable Declaration:",
+ "import math",
+ "R1=15000.0 #Resistance in ohm",
+ "C1=0.01*10**-6 #Capacitance in farad",
+ "C=1*10**-6 #Capacitance in farad",
+ "V=12.0 #Voltage in volt",
+ "",
+ "#Calculations:",
+ "fo=1.2/(4*R1*C1) #Calculating output frequency ",
+ "fon=fo*10**-3 #Calculating output frequency",
+ "LR=7.8*fo/V #Calculating lock range",
+ "LR1=LR/1000.0 #Calculating lock range",
+ "fcd=math.sqrt(LR/(C*2*math.pi*3.6*1000)) #Calculating delta for capture frequency",
+ "",
+ "#Results:",
+ "print('\\nCentre frequency of VCO is= %.2f kHz'%fon)",
+ "print('\\nLock Range = +/- %.1f kHz'%LR1)",
+ "print('\\nDelta FC= %.2f Hz'%fcd)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Centre frequency of VCO is= 2.00 kHz",
+ "",
+ "Lock Range = +/- 1.3 kHz",
+ "",
+ "Delta FC= 239.73 Hz"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example No. 10.5, Page No: 439<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''IC565 Output frequency'''",
+ "",
+ "#Variable Declaration:",
+ "import math",
+ "C1=470.0*10**-12 #Capacitance value in farad",
+ "C=20.0*10**-6 #Capacitance value in farad",
+ "V=12.0 #Voltage in volt",
+ "R1=15000.0 #Resistance in ohm",
+ "",
+ "#Calculations:",
+ "fo=1.2/(4*R1*C1) #Calculating centre frequency of the VCO",
+ "fon=fo/1000.0 #Calculating centre frequency of the VCO",
+ "",
+ "LR=7.8*fo/V #Calculating lock range ",
+ "LR1=LR/1000.0 #Calculating lock range",
+ "fcd=math.sqrt(LR/(C*2*math.pi*3.6*1000)) #Calculating capture range ",
+ "",
+ "#Results:",
+ "print('\\nCentre frequency of VCO is= %.3f kHz'%fon)",
+ "print('\\nLock Range = +/- %.2f kHz'%LR1)",
+ "print('\\nDelta FC= +/- %.2f Hz'%fcd)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Centre frequency of VCO is= 42.553 kHz",
+ "",
+ "Lock Range = +/- 27.66 kHz",
+ "",
+ "Delta FC= +/- 247.27 Hz"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example No. 10.6, Page No: 439<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''PLL'''",
+ "",
+ "#Variable Declaration:",
+ "fr=300.0 #Free running frequency in hertz",
+ "bw=50.0 #Bandwidth in hertz",
+ "ip=320.0 #input signal frequency in hertz",
+ "",
+ "#Calculations:",
+ "pdop=fr+ip #Calculating phase detector output",
+ "difr=ip-fr #Calculating difference frequency",
+ "",
+ "#Results:",
+ "print('\\nPhase detector output= %d kHz'%pdop)",
+ "print('\\nDifference Frequency= %d kHz'%difr)",
+ "print('\\nAs Bandwidth is greater than difference frequency,')",
+ "print('\\nPLL can acquire lock')"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Phase detector output= 620 kHz",
+ "",
+ "Difference Frequency= 20 kHz",
+ "",
+ "As Bandwidth is greater than difference frequency,",
+ "",
+ "PLL can acquire lock"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "markdown",
+ "source": [
+ "<h3>Example no. 10.7, Page No: 440<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''IC565 as FM modulator'''",
+ "",
+ "#Variable Declaration:",
+ "import math",
+ "C1=0.01*10**-6 #Capacitance value in farad",
+ "C=0.04*10**-6 #Capacitance value in farad",
+ "V=12.0 #Voltage in volt",
+ "R1=10000.0 #Resistance in ohm",
+ "",
+ "#Calculations:",
+ "fo=120/(4*R1*C1) #Calculating centre frequency of the VCO",
+ "fon=fo/1000.0 #Calculating centre frequency of the VCO",
+ "",
+ "fld=7.8*fo/(V) #Calculating Lock range",
+ "fldn=fld/1000.0 #Calculating Lock range",
+ " ",
+ "fcd=math.sqrt(fld/(C*2*math.pi*3.6*10**3)) #Calculating capture range",
+ "fcdn=fcd/1000.0 #Calculating Capture range",
+ "",
+ "#Results:",
+ "print('\\nCentre frequency of VCO is= %.1f kHz'%fon)",
+ "print('\\nLock Range= %d kHz'%fldn)",
+ "print('\\nCapture Range= %.2f kHz'%fcdn)"
+ ],
+ "language": "python",
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "",
+ "Centre frequency of VCO is= 300.0 kHz",
+ "",
+ "Lock Range= 195 kHz",
+ "",
+ "Capture Range= 14.68 kHz"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ }
+ ]
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-20 16:55:06 +0000