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+// Chapter 11

+// Design a low pass Butterworth filter

+// Page.No-397

+// Example11_1

+//Figure 11.13 and 11.14

+// Given

+clear;clc;

+L=1.414;            //Alpha

+Ri=1;           //in Ohm

+Rf=2-L;

+printf("\n The value of Rf is = %.3f Ohm\n",Rf); // Result

+Av=1+Rf/Ri;

+printf("\n The pass band gain of  = %.3f \n",Av); // Result

+fc=1000;            //in Hz

+W=2*%pi*fc;

+printf("\n The critical frequency is = %.0f radians per seconds\n",W); // Result

+R=1/W;

+printf("\n The Resistor required is  = %.6f Ohm\n",R); // Result

+C1=2/L;

+printf("\n The capacitor1 required is  = %.3f F\n",C1); // Result

+C2=L/2;

+printf("\n The capacitor2 required is  = %.3f F\n",C2); // Result