Question

What do the small signal parameters in a transistor circuit vary with respect to in the linear analysis?

(a) Load line

(b) Bias point

(c) Temperature

(d) Makes no difference

This question was posed to me during an internship interview.

The question is from Linear Analysis of a Transistor Circuit topic in portion Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

Right option is (b) Bias point

To elaborate: The small signal parameters in a transistor circuit vary with respect to the bias point in the linear analysis model. This occurs even in the linear region of the characteristic curve of the transistor.