Question

How do we determine the hybrid parameters h11 and h21of a two – port network?

(a) Short circuiting the input terminal

(b) Open circuiting the input terminal

(c) Short circuiting the output terminal

(d) Open circuiting the output terminal

This question was posed to me at a job interview.

My question is from Determination of the H-Parameters in division Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

The correct option is (c) Short circuiting the output terminal

To elaborate: There are four h parameters, they are: h11, h12, h21 and h22. To determine the values of h11 and h21 we need to short circuit the output terminal of a given two – port network. Short circuiting the output terminal makes the output terminal voltage V2 equal to zero.