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Threshold-Voltage-Based Regional Modeling of MOSFETs with Symmetry and Continuity

S.B. Chiah, X. Zhou, K. Chandrasekaran, K-Y Lim, L. Chan and S. Chu
Nanyang Technology University, SG

Keywords: threshold voltage, symmetry

Abstract:
This paper presents a unified threshold-voltage-based (Vt-based) MOSFET model, which maintains source¡Vdrain symmetry and allows accurate prediction of transconductance (gm) and drain conductance (gds) and their derivatives (gm' and gds') with smooth transitions across regions of operation. This has been achieved based on our previous unified source-referenced Vt model [1] but re-derived with bulk reference for the drain current (Ids). A consistent and symmetric charge model is also derived for MOSFET intrinsic capacitances. It has been verified with the experimental data from a 0.18-?_m CMOS shallow trench isolation (STI) technology wafer

Nanotech 2004 Conference Technical Program Abstract

 
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