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A compact nonquasi-static MOSFET model based on the equivalent nonlinear transmission line

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2 Author(s)
Pesic, T.V. ; Fac. of Electron. Eng., Univ. of Nis, Serbia ; Jankovic, N.D.

A compact physics-based nonquasi-static (NQS) metal-oxide-semiconductor field-effect transistor (MOSFET) model with the equivalent nonlinear transmission line (TL) representing channel carriers drift-diffusion transport is developed and implemented in the simulation program with integrated circuit emphasis (SPICE) program. An auxiliary subcircuit is described, which efficiently solves the channel surface boundary potentials without the need for employing separate iterative algorithms. The short-channel effects and the quantum effects are efficiently included owning to a surface-potential-based modeling approach. In comparison with other Berkeley short-channel IGFET model 3 (BSIM3)-based NQS MOSFET models, it is shown that the new NQS TL model has the advantages in higher accuracy and substantially fewer number of model parameters. From comparison with a two-dimensional device simulator, it is demonstrated that the new NQS TL model can accurately predict dc, ac, and transient behavior of long- and short-channel n-type MOSFETs in all operational regions and for the input signal frequencies up to 10 fT values, using only one set of model parameters.

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:24 ,  Issue: 10 )