clear; clc; //Caption:To find parameters of Current seris Fwwdback Amplifier //Given Data Gmf=-1;//Transconductance in mA/V D=50;//Desensivity Avf=-4;//Voltage Gain Rs=1;//in K hfe=150; Vt=0.026;//in V Gm=Gmf*D; //B=-Re, D = 1+B*Gm = 1-B*Gm Re=(1-D)/Gm;//in K Rl=Avf/Gmf;//in K // Gm= -hfe/(Rs+hie+Re) hie= -(hfe/Gm)-Rs-Re; Ri = Rs + hie +Re; Rif = Ri*D disp('K',Rif,'Rif='); //end