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diff --git a/506/CH10/EX10.2.b/Example10_2b.sce b/506/CH10/EX10.2.b/Example10_2b.sce
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+clear;
+clc;
+
+//Caption:amplifier using n channel FET
+
+//Given Data
+
+Vp=-2;//in V
+Idss=1.65;//in mA
+//it is desired to bias the circut at Id=0.8mA
+Ids=0.8;//in mA
+Vdd=24;//in V
+//Assumption: rd>Rd
+
+Vgs=Vp*(1-(Ids/Idss)^0.5);//in V
+
+gmo=-(2*Idss/Vp);
+disp('mA/V',gmo,'gmo=');
+gm=gmo*(1-(Vgs/Vp));
+disp('mA/V',gm,'gm=');
+
+//end
+\ No newline at end of file