(a) The open-loop low-frequency voltage gain of an amplifier is Av = 5 × 104 and the open-loop 3 dB frequency is fH = 10 Hz. If the closed-loop low-frequency gain is Av f = 25, what is the closed-loop bandwidth?
(b) The minimum closed-loop bandwidth of a feedback amplifier is to be 20 kHz. The open-loop low-frequency voltage gain is Av = 105 and the open-loop 3 dB frequency is fH = 8 Hz. What is the maximum closed-loop voltage gain?