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diff --git a/3515/CH5/EX5.7/Ex_5_7.sce b/3515/CH5/EX5.7/Ex_5_7.sce
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+// Exa 5.7
+format('v',6);
+clc;
+clear;
+close;
+// Given data
+Av= 50;
+Avf= 25;
+// Formula Avf= Av/(1+Av*Bita)
+Bita= 1/Avf-1/Av;
+// Part(i)
+Av=50;
+Avf= 40;
+Perc_reduction= (Av-Avf)/Av*100;// Percentage of reduction in stage gain in %
+disp(Perc_reduction,"Without feedback, percentage of reduction in stage gain in % is : ")
+
+// Part(ii)
+Av= 40;
+Avf= 25;
+gain_with_neg_feed= Av/(1+Bita*Av);
+Perc_reduction= (Avf-gain_with_neg_feed)/Avf*100;// in %
+disp(Perc_reduction,"With feedback, percentage reduction in stage gain in % is : ")
+