Question

What is the path of the output characteristic of a CB short circuit current frequency response in the saturation region?

(a) Linear

(b) Exponential decrease

(c) Exponential increase

(d) Constant

This question was addressed to me in an interview for internship.

The question is from The CB Short Circuit Current Frequency Response topic in chapter High Frequency Transistor of Electronic Devices & Circuits

Answer 1

Right answer is (c) Exponential increase

Easiest explanation: In a physical model of a CB short circuit current frequency response, the output characteristic curve first increases exponentially and then remains constant. In the saturation region of working the output characteristics show an exponential increase in the collector current with respect to collector base voltage.