(a)If the loop gain is very large, what do you expect the closed loop gain to be? give an expression and its value.
(b) find the DC emitter current in each of Q1 and Q2. also find the DC voltage at the emitter of Q2.
(c) calculate the value of the loop gain AB.(hint set vs =0 and break the loop at the base of Q1. simplify the circuit by eliminating DC sources.
(d) calculate the value of AF.