How do we calculate the inverse hybrid-pi conductance in low frequency H-parameters g21 of a two-port network?(a) g21 = I1 / I2(b) g21 = I2 / I1(c) g21 = V2 / V1(d) g21 = V1 / V2I got this question in a job interview.I would like to ask this question from Hybrid PI Conductances in Low Frequency H Parameters topic in portion High Frequency Transistor of Electronic Devices & Circuits

How do we calculate the inverse hybrid-pi conductance in low frequency

1.	How do we calculate the inverse hybrid-pi conductance in low frequency H-parameters g21 of a two-port network?(a) g21 = I1 / I2(b) g21 = I2 / I1(c) g21 = V2 / V1(d) g21 = V1 / V2I got this question in a job interview.I would like to ask this question from Hybrid PI Conductances in Low Frequency H Parameters topic in portion High Frequency Transistor of Electronic Devices & Circuits
Answer» Correct choice is (c) g21 = V2 / V1 To elaborate: The inverse hybrid-pi conductance in LOW FREQUENCY H-parameters g21 for a two-port network is calculated by open CIRCUITING the output terminal. In this case, the current I2 is equal to zero. The parameter g21 is calculated by taking the ratio of output terminal voltage over input terminal voltage. It is ALSO known as the open circuit voltage gain.

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