SPICE AND SPECTRE

[Ramnath]

Sir,
I tried the simulation of PMOS for its current characteristics in
SPICE,spectre using spice Netlist reader and also in cadence format.
I compared the simulation results of all. Each simulator results
doesn’t match with one another. Even the spectre results using
Netlist reader and cadence format.

Why these differences occur?

How to tune the tool to produce desired results?

How to find what parameter values of pmos devices are taken for
calculation?


Help.

With regards,
V G Ramnath
XXXramnathvgYYY@hotmail.com
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"ramnathvg" == XXXramnathvgYYY <XXXramnathvgYYY@yahoo.co.uk> writes:

ramnathvg> Sir,
ramnathvg> I tried the simulation of PMOS for its current
ramnathvg> characteristics in
ramnathvg> SPICE,spectre using spice Netlist reader and also in
ramnathvg> cadence format.
ramnathvg> I compared the simulation results of all. Each
ramnathvg> simulator results
ramnathvg> doesn’t match with one another. Even the spectre
ramnathvg> results using Netlist reader and cadence format.

ramnathvg> Why these differences occur?

ramnathvg> How to tune the tool to produce desired results?

ramnathvg> How to find what parameter values of pmos devices are
ramnathvg> taken for
ramnathvg> calculation?


ramnathvg> Help.

ramnathvg> With regards, V G Ramnath XXXramnathvgYYY@hotmail.com
ramnathvg> Remove XXX and YYY to mail.

Refer to Spectre Model Equations documentation in cdsdoc. For example
chapter 2 discusses why spectre could differ from SPICE depending on how
kp, uo, cox etc. are specified.

If this does not explain the differences, please post some example
netlists and models that reproduce the problem.

Satya

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