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diff --git a/Electronic_Circuits_by_P._Raja/Chapter5.ipynb b/Electronic_Circuits_by_P._Raja/Chapter5.ipynb new file mode 100755 index 00000000..26c74103 --- /dev/null +++ b/Electronic_Circuits_by_P._Raja/Chapter5.ipynb @@ -0,0 +1,910 @@ +{ + "metadata": { + "name": "", + "signature": "" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Chapter5 - Feedback amplifiers" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.1 - page 383" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from __future__ import division\n", + "# Given data\n", + "A= 800 # unit less\n", + "Af= 50 # unit less\n", + "# Formula Af= A/(1+Bita*A)\n", + "Beta= 1/Af-1/A \n", + "print \"Percentage of output which is feedback to the input = %0.3f %%\" %(Beta*100)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Percentage of output which is feedback to the input = 1.875 %\n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.2 - page 384" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Af= 100 # unit less\n", + "Vi= 50 # in mV\n", + "Vi= Vi*10**-3 # in V\n", + "Vs= 0.5 # in V\n", + "# Formula Af= Vo/Vs\n", + "Vo= Af*Vs # in V\n", + "A= Vo/Vi \n", + "print \"Value of A is %0.f \"%A\n", + "# Formula Af= A/(1+B*A)\n", + "B= 1/Af-1/A \n", + "B=B*100 # in %\n", + "print \"Value of B is %0.1f %%\" %B" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of A is 1000 \n", + "Value of B is 0.9 %\n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.3 - page 385" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Beta= 5/100 \n", + "f_H= 50 # in kHz\n", + "f_H= f_H*10**3 # in Hz\n", + "f_L= 50 # in kHz\n", + "Amid= 1000 \n", + "f_LF= f_L/(1+Beta*Amid) # in Hz\n", + "f_HF= f_H*(1+Beta*Amid) # in Hz\n", + "print \"Value of f_LF = %0.2f Hz\" %f_LF\n", + "print \"Value of f_HF = %0.2f MHz\" %(f_HF*10**-6)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of f_LF = 0.98 Hz\n", + "Value of f_HF = 2.55 MHz\n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.4 - page 385" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "dAf_by_Af= 0.2/100 \n", + "dA_by_A= 150/2000 \n", + "A=2000 \n", + "# Formula dAf_by_Af = 1/(1+Bita*A) * dA_by_A\n", + "Beta= dA_by_A/(A*dAf_by_Af )-1/A \n", + "Af= A/(1+Beta*A) \n", + "print \"Value of Beta = %0.3f %%\" %(Beta*100)\n", + "print \"Value of Af is %0.2f \" %Af" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of Beta = 1.825 %\n", + "Value of Af is 53.33 \n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.5 - page 386" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Av= 140 \n", + "Avf= 17.5 \n", + "# Formula Avf= Av/(1+Av*Beta)\n", + "Beta= 1/Avf-1/Av \n", + "print \"Fraction of the output is %0.2f \"%Beta" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Fraction of the output is 0.05 \n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.6 - page 386" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Av= 100 \n", + "Avf= 50 \n", + "# Formula Avf= Av/(1+Av*Beta)\n", + "Beta= 1/Avf-1/Av \n", + "print \"The vlaue of beta is %0.2f\" %Beta\n", + "\n", + "# Part(ii)\n", + "Avf= 75 \n", + "# Formula Avf= Av/(1+Av*Beta)\n", + "Av= Avf/(1-Beta*Avf)\n", + "print \"Value of amplifier gain is %0.f \"%Av" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The vlaue of beta is 0.01\n", + "Value of amplifier gain is 300 \n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.7 - page 387" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Av= 50 \n", + "Avf= 25 \n", + "# Formula Avf= Av/(1+Av*Beta)\n", + "Beta= 1/Avf-1/Av \n", + "# Part(i)\n", + "Av=50 \n", + "Avf= 40 \n", + "Perc_reduction= (Av-Avf)/Av*100 # Percentage of reduction in stage gain in %\n", + "print \"Without feedback, percentage of reduction in stage gain = %0.f %%\" %(Perc_reduction)\n", + "\n", + "# Part(ii)\n", + "Av= 40 \n", + "Avf= 25 \n", + "gain_with_neg_feed= Av/(1+Beta*Av) \n", + "Perc_reduction= (Avf-gain_with_neg_feed)/Avf*100 # in %\n", + "print \"With feedback, percentage reduction in stage gain = %0.1f %%\" %Perc_reduction" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Without feedback, percentage of reduction in stage gain = 20 %\n", + "With feedback, percentage reduction in stage gain = 11.1 %\n" + ] + } + ], + "prompt_number": 9 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.8 - page 387" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from numpy import pi\n", + "# Given data\n", + "Ao= 10**4 \n", + "Afo= 50 \n", + "omega_H= 2*pi*100 # in rad/s\n", + "# Formula Afo= Ao/(1+Ao*Beta)\n", + "Beta= 1/Afo-1/Ao \n", + "omega_f_H= omega_H*(1+Ao*Beta) \n", + "print \"Closed loop bandwidth in rad/s is\",omega_f_H,\"or 2*pi*20*10**3\" " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Closed loop bandwidth in rad/s is 125663.706144 or 2*pi*20*10**3\n" + ] + } + ], + "prompt_number": 10 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.10 - page 399" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from numpy import inf\n", + "# Given data\n", + "gm=50 \n", + "R_E= 100 # in ohm\n", + "R_S= 1 # in kohm\n", + "R_S=R_S*10**3 # in ohm\n", + "r_pi= 1100 # in ohm\n", + "h_ie= r_pi \n", + "# Formula Av= Vo/Vs, But Vo= gm*vpi*R_E and Vs= Ib*(Ri+rpi), so\n", + "Av= gm*R_E/(R_S+h_ie)\n", + "# As Vo=Vf, so\n", + "Beta=1 \n", + "D= 1+Beta*Av \n", + "Avf= Av/D \n", + "Ri= R_S+r_pi # in ohm\n", + "Ri= Ri*10**-3 # in kohm\n", + "R_if= Ri*D # in kohm\n", + "Ro= inf # ohm\n", + "Rof= Ro*D # ohm\n", + "print \"Value of Av = %0.2f \" %Av\n", + "print \"Value of Beta = %0.f\" %Beta\n", + "print \"Value of Avf = %0.2f\" %Avf\n", + "print \"Value of Ri = %0.2f kohm\" %Ri\n", + "print \"Value of R_if = %0.2f kohm\" % R_if\n", + "print \"Value of R_of = %0.2f \" % Rof\n", + "# Answer slightly mismatch because of calculation accuracy in the textbook." + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of Av = 2.38 \n", + "Value of Beta = 1\n", + "Value of Avf = 0.70\n", + "Value of Ri = 2.10 kohm\n", + "Value of R_if = 7.10 kohm\n", + "Value of R_of = inf \n" + ] + } + ], + "prompt_number": 11 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.11 - page 400" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "gm=2 # in mA/V\n", + "gm=gm*10**-3 # in A/V\n", + "r_d= 40 # in kohm\n", + "r_d= r_d*10**3 # in ohm\n", + "Rs= 3 # in kohm\n", + "Rs= Rs*10**3 # in ohm\n", + "miu= gm*r_d \n", + "Bita=1 \n", + "Av= miu*Rs/(r_d+Rs) \n", + "D= 1+Bita*Av \n", + "Avf= Av/D \n", + "Ri=inf # ohm\n", + "R_if = Ri*D # ohm\n", + "Rof= r_d/D # in ohm\n", + "print \"Value of Av = %0.2f \" %Av\n", + "print \"Value of D = %0.2f \" %D\n", + "print \"Value of Avf = %0.3f \" %Avf\n", + "print \"Value of R_if = %0.2f \" % R_if\n", + "print \"Value of R_of = %0.2e \" % Rof" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of Av = 5.58 \n", + "Value of D = 6.58 \n", + "Value of Avf = 0.848 \n", + "Value of R_if = inf \n", + "Value of R_of = 6.08e+03 \n" + ] + } + ], + "prompt_number": 12 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.12 - page 406" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "gm=75 # in A/V\n", + "Rs= 1 # in kohm\n", + "Rs= Rs*10**3 # in ohm\n", + "R_E= 1 # in kohm\n", + "R_E= R_E*10**3 # in ohm\n", + "rpi= 1 # in kohm\n", + "rpi= rpi*10**3 # in ohm\n", + "hie=rpi \n", + "\n", + "Io= -gm \n", + "Vi= Rs+R_E+rpi \n", + "Gm= Io/Vi \n", + "print \"Value of Gm = %0.3f \" %Gm\n", + "Beta=-R_E \n", + "print \"Value of Beta = %0.f \" %Beta\n", + "D= 1+Beta*Gm \n", + "print \"Value of D = %0.f \" %D\n", + "Gmf= -Gm/D \n", + "print \"Value of Gmf = %0.1e\" %Gmf\n", + "Ri= Rs+R_E+hie # in ohm\n", + "Rif= Ri*D # in ohm\n", + "Rif=Rif*10**-3 # in kohm\n", + "print \"Value of Rif = %0.f kohm\" %Rif\n", + "Ro=inf \n", + "R_of = Ro*D # ohm\n", + "print \"Value of R_of = %0.2f \" %R_of" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of Gm = -0.025 \n", + "Value of Beta = -1000 \n", + "Value of D = 26 \n", + "Value of Gmf = 9.6e-04\n", + "Value of Rif = 78 kohm\n", + "Value of R_of = inf \n" + ] + } + ], + "prompt_number": 13 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.19 - page 417" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "A= 10**5 \n", + "Af= 100 \n", + "# Formula Af= A/(1+A*Bita)\n", + "Bita= 1/Af-1/A \n", + "\n", + "\n", + "#when A= 10**3\n", + "A=10**3 \n", + "Af_desh= A/(1+A*Bita) \n", + "\n", + "delta_Af= Af_desh-Af \n", + "Perc_Change_inAf= delta_Af/Af*100 # in %\n", + "print \"Percentage change in Af = %0.f %% \" %Perc_Change_inAf" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Percentage change in Af = -9 % \n" + ] + } + ], + "prompt_number": 14 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.20 - page 417" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from numpy import log10\n", + "# Given data\n", + "A= 100 \n", + "Vs=1 # in volt\n", + "Beta=1 # as in the voltage follower, the output voltage is same as input\n", + "Af= A/(1+Beta*A) \n", + "CLG= 1+A*Beta # closed loop gain\n", + "print \"Closed loop gain = %0.f\" %CLG\n", + "CLG_dB= 20*log10(CLG) \n", + "print \"Closed loop gain = %0.1f dB\" %CLG_dB\n", + "Vo= Af*Vs # in V\n", + "print \"Value of Vo = %0.2f Volt\" %Vo\n", + "Vi= Vs-Vo # in V\n", + "print \"Value of Vi = %0.2f mV\" %round(Vi*10**3)\n", + "# If A decrease 10%,i.e.\n", + "A=90 \n", + "Af_desh= A/(1+Beta*A) \n", + "Per_gain_reduction= (Af_desh-Af)/Af*100 # in %\n", + "print \"Percentage of gain reduction = %0.1f %%\" %Per_gain_reduction" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Closed loop gain = 101\n", + "Closed loop gain = 40.1 dB\n", + "Value of Vo = 0.99 Volt\n", + "Value of Vi = 10.00 mV\n", + "Percentage of gain reduction = -0.1 %\n" + ] + } + ], + "prompt_number": 15 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.21 - page 418" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "# Part (a)\n", + "PerError= 1 # in %\n", + "A= 10**5 # (Assumed value)\n", + "ABita= 1/PerError*100 \n", + "Bita= 1/(PerError*A) \n", + "print \"% error A A\u00df 1+A\u00df\"\n", + "print PerError,\" %.e\"%A,\" \",ABita,\" \",1+ABita\n", + "# Part (b)\n", + "PerError= 5 # in %\n", + "ABita= 1/PerError*100 \n", + "Bita= 1/(PerError*A) \n", + "print PerError,\" %.e\"%A,\" \",ABita,\" \",1+ABita\n", + "# Part (c)\n", + "PerError= 50 # in %\n", + "ABita= 1/PerError*100 \n", + "Bita= 1/(PerError*A) \n", + "print PerError,\" %.e\"%A,\" \",ABita,\" \",1+ABita" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "% error A A\u00df 1+A\u00df\n", + "1 1e+05 100.0 101.0\n", + "5 1e+05 20.0 21.0\n", + "50 1e+05 2.0 3.0\n" + ] + } + ], + "prompt_number": 16 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.22 - page 419" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "S= -20 # sensitivity of closed to open loop gain in dB\n", + "# sensitivity of closed to open loop gain = 1/(1+AB) = S\n", + "# or (1+AB) = -S\n", + "AB= 10**(-S/20) - 1 \n", + "print \"The loop gain AB = %0.2f, \\nfor which the sensitivity of closed loop gain to open loop gain is -20 dB\" %AB\n", + "\n", + "# Part (b) when \n", + "S= 1/2 # sensitivity of closed to open loop gain in dB\n", + "#S= 1/(1+AB)\n", + "AB= 1/S-1 \n", + "print \"The loop gain AB = %0.2f, \\nfor which the sensitivity of closed loop gain to open loop gain is 1/2 \" %AB" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The loop gain AB = 9.00, \n", + "for which the sensitivity of closed loop gain to open loop gain is -20 dB\n", + "The loop gain AB = 1.00, \n", + "for which the sensitivity of closed loop gain to open loop gain is 1/2 \n" + ] + } + ], + "prompt_number": 17 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.23 - page 419" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from __future__ import division\n", + "#Given Data\n", + "A = 1e5\n", + "Af = 1e3\n", + "Beta = 0.99*1e-3 \n", + "GDF = 1+A*Beta\n", + "print \"Gain density factor %0.2f\" %GDF\n", + "# part (a)\n", + "A_dash = A*90/100\n", + "Af_dash = A_dash/(1+A_dash*Beta)\n", + "cp = (Af-Af_dash)/Af*100 # Corresponding %\n", + "print \"(a) Corresponding % =\",round(cp,2),\"%\"\n", + "# part (a)\n", + "A_dash = A*70/100\n", + "Af_dash = A_dash/(1+A_dash*Beta)\n", + "cp = (Af-Af_dash)/Af*100 # Corresponding %\n", + "print \"(b) Corresponding % =\",round(cp,2),\"%\"" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Gain density factor 100.00\n", + "(a) Corresponding % = 0.11 %\n", + "(b) Corresponding % = 0.43 %\n" + ] + } + ], + "prompt_number": 18 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.24 - page 420" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "A=100 \n", + "Af= 10 \n", + "f_L= 100 # in Hz\n", + "f_H= 10 # in kHz\n", + "# Af= A/(1+A*Bita)\n", + "Bita= 1/Af-1/A \n", + "f_desh_L= f_L/(1+A*Bita) # in Hz\n", + "f_desh_H= f_H/(1+A*Bita) # in kHz\n", + "print \"Low frequency = %0.2f Hz\" %f_desh_L\n", + "print \"High frequency = %0.2f kHz\" %f_desh_H\n", + "\n", + "# Note: In the book Calculation to find the value of high frequency i.e. f_desh_H is wrong so the answer in the book is wrong " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Low frequency = 10.00 Hz\n", + "High frequency = 1.00 kHz\n" + ] + } + ], + "prompt_number": 19 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.25 - page 420" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Vs= 100 # in mV\n", + "Vf= 95 # in mV\n", + "Vs= Vs*10**-3 # in V\n", + "Vf= Vf*10**-3 # in V\n", + "Vo=10 # in V\n", + "Vi= Vs-Vf # in V\n", + "Av= Vo/Vi # in V/V\n", + "print \"Value of Av = %0.e V/V\" %Av\n", + "Beta= Vf/Vo # in V/V\n", + "print \"Value of Bita = %0.1e V/V\" %Beta\n", + "\n", + "# Note: In the book Calculation to find the value of Beta is wrong so the asnwer in the book is wrong" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of Av = 2e+03 V/V\n", + "Value of Bita = 9.5e-03 V/V\n" + ] + } + ], + "prompt_number": 20 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.26 - page 420" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "Is= 100 # in \u00b5A\n", + "Is= Is*10**-6 # in A\n", + "If= 95 # in \u00b5A\n", + "Io= 10 # in mA\n", + "A= Io*1e-3/((Is-If)*1e-6) # n A/A\n", + "Beta= If/Io # A/A\n", + "print \"Value of Av = %0.e V/V\" %Av\n", + "print \"Value of Beta = %0.1f \u00b5A/mA\" %Beta\n", + "# Note: In the book , to evaluating the value of Beta, they putted wrong value of If (90 at place of 95)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Value of Av = 2e+03 V/V\n", + "Value of Beta = 9.5 \u00b5A/mA\n" + ] + } + ], + "prompt_number": 21 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.28 - page 422" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "# Given data\n", + "A=2000 #V/V\n", + "Beta= 0.1 # inV/V\n", + "Ri= 1 # in kohm\n", + "Ri= Ri*10**3 # in ohm\n", + "Ro= 1 # in kohm\n", + "Ro= Ro*10**3 # in ohm\n", + "Af= A/(1+A*Bita) \n", + "print \"The gain Af = %0.2f \"%Af\n", + "Rif= Ri*(1+A*Beta) # in ohm\n", + "print \"The input resistance = %0.f kohm\" %(Rif*10**-3)\n", + "Rof= Ro*1e3/(1+A*Beta) # in ohm\n", + "print \"The output resistance = %0.3f kohm\" %(Rof*10**-3)" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The gain Af = 11.05 \n", + "The input resistance = 201 kohm\n", + "The output resistance = 4.975 kohm\n" + ] + } + ], + "prompt_number": 22 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "Exa 5.29 - page 423" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from __future__ import division\n", + "# Given data\n", + "\n", + "# Part (b)\n", + "Af= 10 \n", + "A= 10**4 \n", + "# Af= A/(1+A*Beta) \n", + "Beta= 1/Af-1/A \n", + "# Beta= R1/(R1+R2)\n", + "R2_by_R1= 1/Beta-1 \n", + "print \"(b) Value of R2/R1 = %0.2f\" %R2_by_R1\n", + "\n", + "# Part (c)\n", + "Vs= 1 # in V\n", + "Vo= (1+R2_by_R1)*Vs \n", + "print \"(c) Value of Vo = %0.2f Volt\" %Vo\n", + "Vf= Vo/(1+R2_by_R1)\n", + "print \"Value of Vf = %0.2f Volt\" %Vf" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "(b) Value of R2/R1 = 9.01\n", + "(c) Value of Vo = 10.01 Volt\n", + "Value of Vf = 1.00 Volt\n" + ] + } + ], + "prompt_number": 23 + } + ], + "metadata": {} + } + ] +} |