Ck. Liu, ANALYTIC NONLINEAR MODEL FOR HARMONICS ANALYSIS IN CMOS INVERTERS, IEEE transactions on circuits and systems. 1, Fundamental theory andapplications, 45(7), 1998, pp. 741-745
An analytic nonlinear model is proposed for analyzing the frequency re
sponse of digital circuits. Applying a Volterra series expansion metho
d, we have developed analytic nonlinear Fourier transfer functions for
a CMOS inverter. Comparison between our calculations and a SPICE simu
lation, its application to study the effects of device models on circu
it performance, and its expansion in complex digital modules are discu
ssed.