Question

How is the h21 hybrid parameter of a two – port network used?

(a) It is used as a voltage source at input port

(b) It is used as a current source at input port

(c) It is used as a voltage source at output port

(d) It is used as a current source at output port

This question was posed to me in exam.

My query is from Measurement of H-Parameters in portion Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

Correct option is (d) It is used as a current source at output port

Explanation: While checking the hybrid parameter equivalent network of a two – port network we see that the hybrid parameter h21 is sued as a current source at the output port. While using Kirchhoff’s current law, the hybrid parameter equations can be represented as a current source of h21I1.