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+// Exa 5.12
+clc;
+clear;
+close;
+// Given data
+gm=75;// in A/V
+Rs= 1;// in kohm
+Rs= Rs*10^3;// in ohm
+R_E= 1;// in kohm
+R_E= R_E*10^3;// in ohm
+rpi= 1;// in kohm
+rpi= rpi*10^3;// in ohm
+hie=rpi;
+
+Io= -gm;
+Vi= Rs+R_E+rpi;
+Gm= Io/Vi;
+disp(Gm,"Value of Gm is : ")
+Bita=-R_E;
+disp(Bita,"Value of Bita is : ")
+D= 1+Bita*Gm;
+disp(D,"Value of D is : ")
+Gmf= Gm/D;
+disp(Gmf,"Value of Gmf is : ")
+Ri= Rs+R_E+hie;// in ohm
+Rif= Ri*D;// in ohm
+Rif=Rif*10^-3;// in kohm
+disp(Rif,"Value of Rif in kohm is : ")
+// Ro=infinite, so R_of = Ro*D = infinite
+disp("Value of R_of is ")
+disp("infinite")
+