Question

How do we calculate the inverse hybrid-pi conductance in low frequency H-parameters g22 of a two-port network?

(a) g22 = V2 / I1

(b) g22 = I1 / V2

(c) g22 = V1 / I2

(d) g22 = V2 / I2

I got this question during an interview.

My query is from Hybrid PI Conductances in Low Frequency H Parameters topic in portion High Frequency Transistor of Electronic Devices & Circuits

Answer 1

Correct choice is (d) g22 = V2 / I2

For explanation I would say: The inverse hybrid-pi conductance in low frequency H-parameters g22 for a two-port network is calculated by short circuiting the output terminal. In this case, the current V1 is equal to zero. The parameter g22 is calculated by taking the ratio of output terminal voltage over output terminal current.