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diff --git a/Electronic_Communication_by_D_Roddy/7-RECEIVERS.ipynb b/Electronic_Communication_by_D_Roddy/7-RECEIVERS.ipynb new file mode 100644 index 0000000..a48b81e --- /dev/null +++ b/Electronic_Communication_by_D_Roddy/7-RECEIVERS.ipynb @@ -0,0 +1,172 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 7: RECEIVERS" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.3_1: example_1.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 227\n", +"//prob no. 7.3.1\n", +"//An RF receiver tunes signal in 550-1600kHz with IF=455kHz\n", +"fs_min=550*10^3;fs_max=1600*10^3;IF=455*10^3;\n", +"//Determination of freq tuning ranges\n", +"fo_min=fs_min+IF;\n", +"fo_max=fs_max+IF;\n", +"disp('Hz',fo_max,'fo_max=','Hz',fo_min,'fo_min=','The freq tuning range is');\n", +"Rf=(fo_max)/(fo_min);//calculation of freq tuning range ratio\n", +"disp(Rf,'Rf=','The tuning range ratio of oscillator is');\n", +"Rc=Rf^2;//calculation of capacitance tuning range ratio\n", +"disp(Rc,'Rc=','The capacitor tuning range ratio of oscillator is');\n", +"//For RF section\n", +"Rf1=fs_max/fs_min;\n", +"disp(Rf1,'Rf=','The tuning range ratio of RF-ckt is');\n", +"Rc1=Rf1^2; \n", +"disp(Rc1,'Rc','The capacitor tuning range ratio of RF-ckt is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.4_1: example_2.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 230\n", +"//prob no. 7.4.1\n", +"//Refer example 7.3.1\n", +"//2-tuning capacitor with max 350pF/section ^ capacitance ratio in eg. 7.3.1\n", +"Rco=8.463;Rfo=2.909;Rcs=4.182;Rfo=2.045;fo_max=2055*10^3;fo_min=1005*10^3;\n", +"Cs_max=350*10^-12;\n", +"//For the RF section\n", +"Cs_min=Cs_max/Rcs;\n", +"disp('F',Cs_min,'The Cs_min is'); " + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.6_1: example_3.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 234\n", +"//prob no. 7.6.1\n", +"// An AM broadcast receiver with following specifications is given\n", +"IF=465;//IF in KHz\n", +"fs=1000;//Tuning freq in KHz\n", +"Q=50;//Quality factor\n", +"// Oscillator freq fo is given as\n", +"fo=fs+IF;\n", +"// a) Image freq is given as\n", +"fi=fo+IF;\n", +"disp('KHz',fi,'Image freq is');\n", +"y=fi/fs - fs/fi;\n", +"// b) image rejection is given as \n", +"Ar=1/sqrt(1+(y*Q)^2);\n", +"Ar_dB=20*log10(Ar);\n", +"disp('dB',Ar_dB,'Image rejection is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 7.7_1: example_4.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 236\n", +"//prob no. 7.7.1\n", +"// refer to example 7.3.1\n", +"// A broadcast receiver is tuned to a signal with\n", +"fs=950;//in KHz\n", +"IF=455;//in KHz\n", +"m=[1,2];\n", +"n=[1,2];\n", +"f0=fs+IF;\n", +"disp('The sum of frequencies are');\n", +"for i=1:1:2\n", +" for j=1:1:2\n", +"fu1=n(j)/m(i) *f0 + 1/m(i) *IF;\n", +"disp(fu1);\n", +"end\n", +"end\n", +"disp('The difference of frequencies are');\n", +"for i=1:1:2\n", +" for j=1:1:2\n", +"fu2=n(j)/m(i) *f0 - 1/m(i) *IF;\n", +"disp(fu2);\n", +"end\n", +"end" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |