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How do we determine the hybrid parameters h12 and h22 in a two – port linear device?

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How do we determine the hybrid parameters h12 and h22 in a two – port linear device?

(a) Short circuiting the input terminal

(b) Open circuiting the input terminal

(c) Short circuiting the output terminal

(d) Open circuiting the output terminal

I had been asked this question by my school principal while I was bunking the class.

This is a very interesting question from Determination of the H-Parameters topic in division Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

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Correct option is (b) Open circuiting the input terminal

Easiest explanation: From the four hybrid parameters, to determine the value of h12 and h22 we need to open circuit the input terminal. This in turn makes the current from the input terminal I1 equal to zero.

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