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diff --git a/1223/CH12/EX12.3/Ex12_3.sce b/1223/CH12/EX12.3/Ex12_3.sce
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+clear;
+clc;
+//Example 12.3
+Ao=10^4;
+wh=2*%pi*100;//rad/s
+Af=50;
+//x=(1+bAo)
+x=Ao/Af;
+printf('\n(1+bAo)=%f\n',x)
+wfh=wh*x;
+printf('\nclosed loop bandwidth=%f\n',wfh)