We propose a harmonic balance technique for the frequency-domain analysis o
f the metal-oxide-semiconductor field-effect transistor (MOSFET) operation.
The MOSFET model in our approach is based on the charge-sheet and the nonq
uasi-static MOSFET models in the channel region with a harmonic balance tec
hnique applied to the channel charges. It is shown that the proposed method
renders a computationally efficient tool to analyze the harmonic distortio
n occurrence in the MOSFET device due to the nonlinear response of the chan
nel charges.