Question

The push-pull circuit must use ________ operation.

(a) Class A

(b) Class B

(c) Class C

(d) Class AB

I have been asked this question in a national level competition.

Asked question is from Class B Output Stage in chapter Differential and Multistage Amplifiers of Electronic Devices & Circuits

Answer 1

Correct choice is (b) Class B

To elaborate: The basic class B amplifier uses two complimentary transistors (bipolar or FET ) for each half of the waveform, they are arranged in a push-pull form. No DC base bias current in the class B power amplifier.