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+// Exa 4.20

+clc;

+clear;

+close;

+format('v',6)

+// Given data

+R_S = 200;// in ohm

+R_L = 1200;// in ohm

+h_ib = 24;// in ohm

+h_rb = 4*10^-4;// unit less

+h_fb = -0.98;// unit less

+h_ob = 0.6;// in µA/V

+h_ob = h_ob * 10^-6;// in A/V

+Ai = -h_fb/(1+(h_ob*R_L));// unit less

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

+Ri = h_ib + (h_rb*Ai*R_L);// in ohm

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

+Av = round((Ai*R_L)/Ri);// unit less

+disp(Av,"The Voltage gain is");

+Ais = (Ai*R_S)/(Ri+R_S);// unit less

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