Question

What is the equivalent hybrid parameter for the transistor hybrid parameter hib?

(a) h11

(b) h12

(c) h21

(d) h22

This question was addressed to me during an internship interview.

The origin of the question is Conversion Formulas for the Parameters of the Three-Transistor Configurations topic in chapter Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

Right choice is (a) h11

To elaborate: The transistor hybrid parameter hib is equivalent to the hybrid parameter h11. The transistor hybrid parameter is a measure of the output short circuit with input impedance. The transistor equivalent parameter is a ratio of the voltage across one terminal and the current.