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+// Exa 4.3

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+h_ic = 2;// in k ohm

+h_fc = -51;

+h_oc = 25*10^-6;// in ohm

+h_rc= 1;

+V_CC = 20;// in V

+R1 = 10;// in k ohm

+R2 = 10;// in k ohm

+R_S = 1;// in k ohm

+R_E = 5;// in k ohm

+R_B= 5;// in k ohm

+R_L= 5;// in k ohm

+// (i) Current Gain

+Ai = (-h_fc)/(1+h_oc*R_E*10^3);

+disp(Ai,"The current gain is");

+// (ii) Input impedance

+Zi = h_ic*10^3 + h_rc*Ai*R_E*10^3;// in ohm

+Zi = Zi * 10^-3;// in k ohm

+disp(Zi,"The input impedance in k ohm is");

+// (iii) Voltage Gain

+A_V = (Ai*R_L*10^3)/(Zi*10^3);

+A_V = 1;// (approx)

+disp(A_V,"The voltage gain is");

+// (iv) Overall Input Impedance

+Z_IS = (R_B*Zi)/(R_B+Zi);// in k ohm

+disp(Z_IS,"The overall input impedance in k ohm is");

+// (v) Overall voltage gain

+A_VS = (A_V*Zi)/(Zi+R_S); 

+disp(A_VS,"The overall voltage gain is");

+// (vi) Overall current gain

+A_IS =Ai*(R_B/(R_B+Zi));

+disp(A_IS,"The overall current gain is");

+// (vii) Output impedance

+RdasS = (R_S*R_B)/(R_S+R_B);// in k ohm

+Yo = h_oc - ( (h_fc*h_rc)/(h_ic*10^3+RdasS*10^3) );// in mho 

+Zo = 1/Yo;// in ohm

+disp(Zo,"The output impedance in ohm is");