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diff --git a/74/CH3/EX3.5/example5_sce.sce b/74/CH3/EX3.5/example5_sce.sce
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+//chapter 3
+//example 3.5
+//page 120,
+A=2*10^5;//open loop gain
+R1=1000;Rf=10000;
+Ri=2*10^6;//input resistance
+Ro=75;//output resistance
+Fo=5;// single break frequency in Hz
+B=R1/(R1+Rf)
+Af=A/(1+A*B);//gain
+disp(Af)// closed loop gain
+Rif=Ri*(1+A*B);// closed loop input resistance
+disp(Rif)
+Rof=Ro/(1+A*B);
+disp(Rof)// colsed loop output resistance
+Fof=Fo*(1+A*B);
+disp(Fof)// colsed loop bandwidth in Hz
+\ No newline at end of file