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View Full Version : Transfer function of NMOS schematic


dalarev
Oct25-09, 03:27 PM
1. The problem statement, all variables and given/known data

Attachment titled Clapp Schematic is what I am finding the transfer function of. Results are obtained with small signal, low frequency, equivalent circuit for a common-source NMOS.

2. Relevant equations

I have derived two different formulas, looking at Vo in 2 different ways.

3. The attempt at a solution

My 2 results are in the last 2 images attached, where I derive 2 different expressions for Vo/Vi.

Having the transfer function, we set Im[H(s)] = 0 to find resonant frequency, but as can be seen from my derivation, it is not possible.