Analytic Non-linear Circuit Analysis for Resistive FET Mixers

Analytic Non-linear Circuit Analysis for Resistive FET Mixers

Abstract

Resistive mixers present a difficult circuit analysis problem as they involve a small signal incident to
a time varying, weak non-linearity. The most widely used technique for this type of analysis is Harmonic Balance,
however, no analytic insight is gained from this technique. Other techniques exist, however, all the current
methods either involve numerically derived solutions or are only useful for conversion gain, not distortion prediction.
It is desirable to find an analytic expression to link individual circuit components to the output effect of concern.
This talk looks at double volterra analysis, including non-linearity extraction, and its range of accuracy for prediction of
LO leakage in resistive mixers. One potential method of improvement is shown from a simplification of theanalytic result.