Question

A Class B push-pull complementary symmetry amplifier uses:

• A. Two NPN transistors
• B. One PNP and one NPN transistor
• C. Two PNP transistors
• D. Pre-amplifier of NPN, then two-transistor amplifier

Hint:

Class B push-pull → uses complementary transistors (one NPN + one PNP) for full cycle amplification.

Answer 1

The Correct Option is B

A Class B push-pull amplifier works by splitting the input waveform:
- NPN handles the positive half,
- PNP handles the negative half.
This minimizes power loss and improves efficiency.