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diff --git a/3515/CH2/EX2.23/Ex_2_23.sce b/3515/CH2/EX2.23/Ex_2_23.sce
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+// Exa 2.23
+format('v',5);
+clc;
+clear; 
+close;
+// Given data 
+I_D= 1;// in mA
+I_D= I_D*10^-3;// in A
+gm= 1;//in mA/V
+gm= gm*10^-3;//in A/V
+f_L= 10;// in Hz
+R_S= 6;// in kΩ
+R_S= R_S*10^3;// in Ω
+R_D= 10;// in kΩ
+R_D= R_D*10^3;// in Ω
+vo_by_vi= -gm*R_D/(1+gm*R_S);// in V/V
+disp(vo_by_vi,"Mid band gain in V/V is : ");
+// Formula f_L= 1/(2*%pi*(1/gm || R_S)) * CS
+CS= 1/(2*%pi*(1/gm*R_S/(1/gm+R_S))*f_L) ;//in F
+CS= CS*10^6;// in µF
+disp(CS,"The value of Cs in µF is : ")