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diff --git a/sample_notebooks/MohdRizwan/MohdRizwan_version_backup/Chapter8.ipynb b/sample_notebooks/MohdRizwan/MohdRizwan_version_backup/Chapter8.ipynb new file mode 100755 index 00000000..0017f769 --- /dev/null +++ b/sample_notebooks/MohdRizwan/MohdRizwan_version_backup/Chapter8.ipynb @@ -0,0 +1,253 @@ +{ + "metadata": { + "name": "Rijwan", + "signature": "sha256:ccfeb26b31d807a5210cb280c22c39e23c0906566f59b1bedfeb5dfebe856c36" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Ch-8 Oscillators" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 8.1, page 272 " + ] + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "from __future__ import division\n", + "#Given data\n", + "A=50 #unitless\n", + "criteria = \"Barkhausen criterion for oscillator : Beta*A=1\"\n", + "Beta=1/A #unitless\n", + "print criteria,\"\\nFeedback Factor for oscillator : \",Beta" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Barkhausen criterion for oscillator : Beta*A=1 \n", + "Feedback Factor for oscillator : 0.02\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 8.2, page 279" + ] + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "from __future__ import division\n", + "from math import pi\n", + "#Given data\n", + "L=100 #in uH\n", + "L=L*10**-6 #in H\n", + "f1=500 #in kHz\n", + "f1=f1*10**3 #in Hz\n", + "f2=1500 #in kHz\n", + "f2=f2*10**3 #in Hz\n", + "#Formula : f=1/(2*%pi*sqrt(L*C))\n", + "C1=1/(4*pi**2*f1**2*L) #in F\n", + "C2=1/(4*pi**2*f2**2*L) #in F\n", + "C1*=10**12 #pF\n", + "C2*=10**12 #pF\n", + "print \"Range of capacitor : %0.2f pf to %0.2f pf\" %(C2, C1)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Range of capacitor : 112.58 pf to 1013.21 pf\n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 8.3, page 285" + ] + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "from __future__ import division\n", + "from math import pi \n", + "#Given data\n", + "R=100 #in kOhm\n", + "R=R*10**3 #in Ohm\n", + "C=0.01 #in uF\n", + "C=C*10**-6 #in F\n", + "fo=sqrt(6)/(2*pi*R*C) #in Hz\n", + "print \"Frequency of oscillation is %0.3f Hz\" %fo" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Frequency of oscillation is 389.848 Hz\n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 8.4, page 288" + ] + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "from __future__ import division\n", + "from math import sqrt\n", + "#Given data\n", + "assumed = \"Assume alfa=sqrt(6) to find the gain.\"\n", + "alfa=sqrt(6) #unitless\n", + "Beta=1/(1-5*alfa**2) \n", + "criteria = \"Barkhausen critera : A*|Beta|>=1\"\n", + "Beta=-Beta #\n", + "A=1/Beta #unitless\n", + "print assumed,\"\\n\",criteria,\"\\nMinimum Gain of Amplifier must be \",A" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Assume alfa=sqrt(6) to find the gain. \n", + "Barkhausen critera : A*|Beta|>=1 \n", + "Minimum Gain of Amplifier must be 29.0\n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 8.6, page 289" + ] + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "from __future__ import division\n", + "from math import pi, sqrt\n", + "#Given data :\n", + "R1=50 #in kohm\n", + "R1=R1*10**3 #in ohm\n", + "C1=0.001 #in uF\n", + "C1=C1*10**-6 #in F\n", + "R2=1 #in kohm\n", + "R2=R2*10**3 #in ohm\n", + "C2=0.01 #in uF\n", + "C2=C2*10**-6 #in F\n", + "#Part (i)\n", + "#Formula : f=1/(2*pi*sqrt(C1*C2*R1*R2))\n", + "f=1/(2*pi*sqrt(C1*C2*R1*R2)) #in Hz\n", + "f/=1000 #kHz\n", + "print \"(i) Frequency of oscillations is %0.3f kHz\" %f\n", + "#Part (ii)\n", + "CurrentGain=1+C2/C1+R1/R2 #unitless\n", + "print \"(ii) Current Gain : \",CurrentGain" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(i) Frequency of oscillations is 7.118 kHz\n", + "(ii) Current Gain : 61.0\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 8.7, page 295" + ] + }, + { + "cell_type": "code", + "collapsed": true, + "input": [ + "from __future__ import division\n", + "from math import sqrt, pi\n", + "#Given data :\n", + "fmin=20 #in Hz\n", + "fmax=20 #in kHz\n", + "Cmin=30 #in pF\n", + "Cmax=300 #in pF\n", + "#Formula : fo=1/(2*pi*R*C))\n", + "R=1/(2*pi*fmin*Cmax*10**-12) # ohm\n", + "R/=10**6 # Mohm\n", + "print \"Required resistance is %0.3f Mohm\" %R" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Required resistance is 26.526 Mohm\n" + ] + } + ], + "prompt_number": 21 + } + ], + "metadata": {} + } + ] +} |