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769 B
769 B
README for VDMOS model in NGSPICE
==================
A simmple MOS model for vertical power transistors (VDMOS model) is under
development. Originally it has been available in LTSPICE
(see http://ltwiki.org/LTspiceHelp/LTspiceHelp/M_MOSFET.htm) or
SuperSpice (https://www.anasoft.co.uk/MOS1Model.htm).
It is based on the MOS1 model. The Meyer capacitance has been
replaced by a special cap model. A body diode with series
resistance is parallel to the D/S device nodes. It defines the
reverse behavior, but also the breakdown of the transistor.
This is a work in progress.
Basic current equations for ac, dc and tran operations are
available as well as the capacitance model.
Still missing are parameter mtriode and the subthreshold behavior
(parameter subthres).