initial commit / add all books

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+// Exa 3.19

+clc;

+clear;

+close;

+// Given data

+R1=540;// in ohm

+R3=R1;

+R_f=5.4;// in k ohm

+R_f=R_f*10^3;// in ohm

+R2=R_f;// in ohm

+v_in1= -2.5;// in volt

+v_in2= -3.5;// in volt

+R_in=2;// in M ohm

+R_in= R_in*10^6;// in ohm

+A=2*10^5;

+A_d= (1+R_f/R1);

+disp(A_d,"Voltage gain : ");

+v_out=A_d*(v_in1-v_in2);// in volt

+disp(v_out,"Output voltage in volt");

+R_inf1= R_in*(1+A*R1/(R1+R_f));

+R_inf2= R_in*(1+A*R2/(R2+R3));

+disp("Internal resistance : "+string(R_inf1)+" ohm and "+string(R_inf2)+" ohm   ");