//chapter 12
//example 12.10
//page 494
printf("\n")
printf("given")
hfe=50;hie=1.3*10^3;R3=5.6*10^3;R5=3.9*10^3;Rl=40*10^3;
Av1=-(hfe*((R3*hie)/(R3+hie)))/hie
Av2=-(hfe*((R5*Rl)/(R5+Rl)))/hie
disp(" overall voltage gain is Av=Av1*Av2")
Av=Av1*Av2