2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Consistency of compact MOSFET models with the Pao-Sah formulation: consequences for small-signal analysis

C. Galup-Montoro, M.C. Schneider and A.I.A. Cunha
Federal University of Santa Catarina, BR

compact MOSFET model, small signal analysis, analog circuit analysis and design

Compact models for the MOSFET are based on the decomposition of the two-dimensional problem into two one-dimensional problems. Since a compact MOSFET model core consists of an input voltage equation, and an output current equation, a consistent compact model must approximate these two (orthogonal) equations consistently. In this study we will review the main compact models, beginning with the Pao-Sah model and including surface potential, charge controlled and classical strong inversion models. A simple consistency test is applied to all models and the consequences of a model failing the test, for small-signal analysis and design, are highlighted.

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