Question

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

(a) h11

(b) h12

(c) h21

(d) h22

The question was asked in an internship interview.

This intriguing question originated from Conversion Formulas for the Parameters of the Three-Transistor Configurations topic in section Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

The correct option is (b) h12

For explanation: The transistor hybrid parameter hre is equivalent to the hybrid parameter h12. The transistor hybrid parameter is a measure of the open circuit reverse voltage transfer ratio. The transistor equivalent parameter is a ratio of the voltages across two terminals.