A simple MOSFET model for circuit analysis

Abstract

A simple, general, yet realistic MOSFET model, the nth power law MOSFET model, is introduced. The model can express I-V characteristics of short-channel MOSFETs at least down to 0.25- mu m channel length and of resistance inserted MOSFETs. The model evaluation time is about 1/3 of the evaluation time of the SPICE3 MOS LEVEL3 model. The model parameter extraction is done by solving single variable equations and thus can be done within a second, unlike the fitting procedure with expensive numerical iterations used for the conventional models. The model also permits analytical treatment of circuits in the short-channel region and plays the role of a bridge between complicated MOSFET current characteristics and circuit behavior in the deep-submicrometer region.