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-rwxr-xr-x1658/CH22/EX22.18/Ex22_18.sce9
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diff --git a/1658/CH22/EX22.18/Ex22_18.sce b/1658/CH22/EX22.18/Ex22_18.sce
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+clc;
+//e.g 22.18
+gm=2500*10**-6;
+Ri=2000;
+RD=10000;
+AV=gm*RD;
+disp(AV);
+Ri1=(Ri/gm)/(Ri+1/gm);
+disp('ohm',Ri1*1,"Ri1=");