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diff --git a/2582/CH3/EX3.12/Ex3_12.sce b/2582/CH3/EX3.12/Ex3_12.sce
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+//Ex 3.12
+clc;clear;close;
+format('v',6);
+fo=1.2*1000;//Hz
+Q=4;//Quality factor
+Ap=10;//band pass gain
+C=0.05;//micro F(have to choose C, 0.01<C<1)
+R2=2*Q/(2*%pi*fo*C*10^-6)/1000;//kohm
+R1=R2/2/Ap;//kohm
+R3=R1/(4*%pi^2*R1*1000*R2*1000*(C*10^-6)^2*fo^2-1);//kohm
+disp("Design values are :");
+disp(C,"Capacitance(micro F)");
+disp(R1,"Resistance R1(kohm)");
+disp(R2,"Resistance R2(kohm)");
+disp(R3*1000,"Resistance R3(ohm)");
+//Answer in the book is wrong for R3 & value of C is 0.05 instead of 0.5.