Question

The technique used to quickly switch off a transistor is by_________

(a) reverse biasing its emitter to collector junction

(b) reverse biasing its base to collector junction

(c) reverse biasing its base to emitter  junction

(d) reverse biasing any junction

This question was addressed to me during an online interview.

The above asked question is from Transistor Switching Times topic in portion Transistor Characteristics of Electronic Devices & Circuits

Answer 1

Right choice is (c) reverse biasing its base to emitter  junction

For explanation: The technique used to quickly switch off a transistor is by reverse biasing its base to collector junction. It is demonstrated in a high voltage switching circuit. The advantage of this circuit is that it is not necessary to have high voltage control signal.