Question

How is the h12 hybrid parameter of a two – port network used?

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

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

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

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

The question was posed to me in class test.

Question is taken from Measurement of H-Parameters in section Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

The correct option is (c) It is used as a voltage source at input port

Easiest explanation: While checking the hybrid parameter equivalent network of a two – port network we see that the hybrid parameter h12 is sued as a voltage source at the input port. While using Kirchhoff’s voltage law, the hybrid parameter equations can be represented as a fixed voltage source of h21V2.