Question

In mid frequency region, the large capacitors are short and small capacitors are open circuited. What happens to the RC coupled circuit?

(a) the circuit is now frequency blind

(b) it is DC isolated

(c) the circuit turns reactive

(d) the circuit is AC dependent

The question was posed to me in semester exam.

The above asked question is from Problems on AC and DC Analysis topic in chapter Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

The correct answer is (a) the circuit is now frequency blind

The best explanation: In the mid frequency region, the whole circuit is resistive because the large capacitors are short and small capacitors are open circuited. The gain is constant in this region. So, the circuit is frequency blind as the gain is constant in this region.