Pspice MOSFET models

[Subhajit Sen]

I am experimenting with Pspice (v.10) for analog VLSI
circuit design using MOSFET models available from
the web(from modeling companies/foundries etc.)
and some old level-3 HSPICE level-3
models. I am aware than Pspice does
not support 'binning' that is characteristic
of VLSI MOSFET models but prepared to do the necessary
work-arounds for this (write separate models etc.).

So far I have been able to get Pspice to simulate
by modifying the models file e.g. comment out
parameters e.g. ACM (which specifices diode cap.)
etc. However, I am not getting expected results
e.g. the gain values I am computing differ from
what Pspice gives.

My question is: has anybody
had successful experience in using Pspice as
with models published in the web (from foundries,
modelling companies etc.) for
analog VLSI design and obtained consistent results.
Also does anybody know of of foundry supplied models
that work well with Pspice?

Regards,
Subhajit

 

[Jim Thompson]

On 25 May 2004 23:39:57 -0700, sen@ieee.org (Subhajit Sen) wrote:

I am experimenting with Pspice (v.10) for analog VLSI
circuit design using MOSFET models available from
the web(from modeling companies/foundries etc.)
and some old level-3 HSPICE level-3
models. I am aware than Pspice does
not support 'binning' that is characteristic
of VLSI MOSFET models but prepared to do the necessary
work-arounds for this (write separate models etc.).

So far I have been able to get Pspice to simulate
by modifying the models file e.g. comment out
parameters e.g. ACM (which specifices diode cap.)
etc. However, I am not getting expected results
e.g. the gain values I am computing differ from
what Pspice gives.

My question is: has anybody
had successful experience in using Pspice as
with models published in the web (from foundries,
modelling companies etc.) for
analog VLSI design and obtained consistent results.
Also does anybody know of of foundry supplied models
that work well with Pspice?

Regards,
Subhajit

(1) Foundry-provided models work just fine with PSpice and correlate
virtually exactly with simulations on HSpice, Cadence, etc.,
PROVIDED...

(2) Use a high level model. Level=3 is amateur land.

(3) If you simulate a different gain than what you calculate, your
calculation is inaccurate.

...Jim Thompson
--
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