{ "metadata": { "name": "ch_7" }, "nbformat": 2, "worksheets": [ { "cells": [ { "cell_type": "markdown", "source": [ "

Chapter 7: Waveform Generators" ] }, { "cell_type": "markdown", "source": [ "

Example No.7.1 , Page NO: 324

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declarartion:", "import math", "f=300.0 #frequency in hertz", "C=0.1*10**-6 #capacitance in farad", "", "#Calculations:", "t=f*C ", "R=1/(2*math.pi*t*math.sqrt(6)) #Calculating resistance value", "R=R/1000 #Calculating resistance value", "R1=22000.0 #Calculating resistance value", "Rf=29.0*R1 #Calculating resistance value", "Rf=Rf/1000.0 #Calculating resistance value", "", "#Results:", "print('R= %.2f kohm'%R)", "print('\\nLet R=2.2 kohm, hence R1=22 kohm')", "print('\\nRf= %d kohm'%Rf)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "R= 2.17 kohm", "", "Let R=2.2 kohm, hence R1=22 kohm", "", "Rf= 638 kohm" ] } ], "prompt_number": 1 }, { "cell_type": "markdown", "source": [ "

Example No. 7.2, Page No: 326

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "import math", "f=2000.0 #Frequency in hertz", "C=0.05*10**-6 #Capacitance in farad", "", "#Calculations:", "t=f*C", "R=1/(2*math.pi*t) #Calculating resistance value", "R=R/1000.0 #Calculating resistance value", "R1=1800.0 #Calculating resistance value", "Rf=2.0*R1 #Calculating resistance value", "Rf=Rf/1000.0 #Calculating resistance value", "", "#Results:", "print('R= %.3f kohm'%R)", "print('\\nLet R=1.8 kohm')", "print('\\nRf= %3f kohm'%Rf)", "print('\\nStandard value Rf= 3.3 kohm')" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "R= 1.592 kohm", "", "Let R=1.8 kohm", "", "Rf= 3.600000 kohm", "", "Standard value Rf= 3.3 kohm" ] } ], "prompt_number": 4 }, { "cell_type": "markdown", "source": [ "

Example No.7.3, Page No: 329

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "R1=116.0*10**3 #Resistance in ohm", "R2=100.0*10**3 #Resistance in ohm", "Vsat=14.0 #Voltage in volt", "", "#Calculations:", "# Part A", "f=1000.0 #Frequency in hertz ", "", "T=1/f ", "# As log value is approx 1", "RC=T/2 #Calculating time constant", "RC1=RC*1000.0 #Calculating time constant", "", "# Part B", "C=0.01*10**-6 #Capacitance in farad", "R=RC/C #Calculating resistance", "Rn=R/1000.0 #Calculating resistance", "", "# Part C", "Vmax=2*Vsat*(R2/(R1+R2)) #Calculating maximum value of differential voltage", "", "#Results:", "print('RC= %.1f *10^-3 sec'%RC1)", "print('\\nR= %d kohm'%Rn)", "print('\\nMaximum value of differential input voltage= %.2f V'%Vmax)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "RC= 0.5 *10^-3 sec", "", "R= 50 kohm", "", "Maximum value of differential input voltage= 12.96 V" ] } ], "prompt_number": 3 }, { "cell_type": "markdown", "source": [ "

Exa ple NO. 7.4,Page NO: 330

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "fo=1000.0 #Frequency in hertz", "Vcc=12.0 #Voltage Vcc in volt", "R1=10.0*10**3 #Resistance in ohm", "R2=10.0*10**3 #Resistance in ohm", "C=0.1*10**-6 #Capacitance value in farad", "", "#Calculations:", "R=1/(2.2*C*fo) #Calulating resistance value", "R=R/1000.0 #Calculating resistance value", "", "#Results:", "print('R= %.3f kohm'%R)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "R= 4.545 kohm" ] } ], "prompt_number": 4 }, { "cell_type": "markdown", "source": [ "

Example No. 7.5, Page No: 334

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "R1=100.0*10**3 #Resistance in ohm", "R3=20.0*10**3 #Resistance in ohm", "C1=0.01*10**-6 #Capacitance in farad", "Vsat=14.0 #Voltage in volt", "", "#Calculations:", "# Part A", "T=4*R1*R2*C1/R3 #Calculating time period", "Tn=T*1000 #Calculating time period", "", "# Part B", "f=1/T #Calculating frequency", "", "# Part C", "", "# Part D", "Vp=R2*Vsat/R3 #Calculating peak value of the triangular wave", "", "#Results:", "print('Time period T= %d ms'%Tn)", "print('\\nfrequency f= %d Hz'%f)", "print('\\nPeak value is +14V and -14V')", "print('\\nTriangular wave oscillates between %d V and - %d V'%(Vp,Vp))" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Time period T= 2 ms", "", "frequency f= 500 Hz", "", "Peak value is +14V and -14V", "", "Triangular wave oscillates between 7 V and - 7 V" ] } ], "prompt_number": 2 }, { "cell_type": "markdown", "source": [ "

Example NO. 7.6, Page No: 336

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "Ri=10.0*10**3 #Resitance in ohm", "Vp=10.0 #Voltage in volt", "Vref=10.0 #Voltage in volt", "fo=200.0 #Frequency in hertz", "C1=0.1*10**-6 #Capacitance in farad", "Vi=2.0 #Voltage in volt", "", "#Calculations:", "t=Vi/Vref ", "f=t/(Ri*C1) #Calculating frequency", "", "#Result:", "print('Frequency f= %d Hz'%f)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Frequency f= 200 Hz" ] } ], "prompt_number": 6 }, { "cell_type": "markdown", "source": [ "

Example No. 7.7, Page no: 345

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Answer in textbook is wrong", "#Varible Declaration:", "C=0.1*10**-6 #Capacitance in farad", "t=1*10**-3 #time in second", "", "#Calculations:", "R=t/(1.22*C) #Calculating resistance value", "R=R/1000 #Calculating resistance value", "", "#Result:", "print('R= %.1f kohm'% R)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "R= 8.2 kohm" ] } ], "prompt_number": 7 }, { "cell_type": "markdown", "source": [ "

Example No. 7.8, Page No: 351

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "D=20.0 # 20 percent #Duty cycle", "Ton=1.0*10**-3 #On time period in seconds ", "", "#Calculatins:", "Tonpoff=100.0*Ton/D #Calculating total time period ", "Tonpoff1=Tonpoff*1000.0 #Calculating total time period", "f=1/Tonpoff #Calculating frequency of oscillation", "", "#Results:", "print('Ton + Toff= %d ms'%Tonpoff1)", "print('\\nFrequency of oscillation= %d Hz'%f)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Ton + Toff= 5 ms", "", "Frequency of oscillation= 200 Hz" ] } ], "prompt_number": 8 }, { "cell_type": "markdown", "source": [ "

Example No. 7.9, Page No: 351

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "D=0.7 #Duty cycle ", "f=1000.0 #Frequency in hertz", "", "RB=10.0**4/(6.43/3.0) #Resistance value in ohm", "", "#Calculations:", "RA=4.0*RB/2.75 #Calculating resistance value", "RB1=RB/1000.0 #Calculating resistance value", "RA1=RA/1000.0 #Calculating resistance value", "", "#Results:", "print('RB= %.1f kohm'%RB1)", "print('\\nRA= %.1f kohm'%RA1)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "RB= 4.7 kohm", "", "RA= 6.8 kohm" ] } ], "prompt_number": 12 }, { "cell_type": "markdown", "source": [ "

Example 7.10, Page No: 352

" ] }, { "cell_type": "code", "collapsed": false, "input": [ "", "#Variable Declaration:", "f1=1070.0 #Frequency in hertz", "RA=50000.0 #Resistance in ohm", "C=0.01*10**-6 #Capacitance value in farad", "Rc=76.0#Standard Value #Resistance in ohm", "", "#Calculations:", "t=1.45/(f1*C) ", "RB=(t-RA)/2 #Calculating value of resistance ", "RB=RB/1000 #Calculating value of resistance", "", "#Results:", "print('Assuming RA= 50 kohm and C= 0.01 uF')", "print('\\nHence, RB= %.2f kohm'%RB)", "print('\\nRc= %d ohm (Standard Value)'%Rc)" ], "language": "python", "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Assuming RA= 50 kohm and C= 0.01 uF", "", "Hence, RB= 42.76 kohm", "", "Rc= 76 ohm (Standard Value)" ] } ], "prompt_number": 10 } ] } ] }