From: Ingraham, Andrew (Andrew.Ingraham@compaq.com)
Date: Mon Feb 05 2001 - 11:37:42 PST
> I am interested in generating IBIS models from measured data, the
> ApsimIBIS-Toolkit advertises the ability to generate the models from
> measured data without requiring SPICE models. Does anyone have any
> recommendations/experience/comments about this tool or this procedure of
> generating IBIS models?
Generating IBIS models from measured data is the right way to do it! Too
many people rely on IBIS models derived from faulty or incomplete SPICE
models, with little or no attempt made to correlate them with reality. IBIS
models (unlike SPICE) are ideal for measured data. At least *your* IBIS
models won't have tera-amps in the I/V curves!
The only problem is how to generate extreme min/max characteristics. It
helps if you are able to fab some silicon at the process extremes; otherwise
you may need to extrapolate somewhat from your measured data.
If you have the right measured data, there is no magic to turning them into
IBIS models. You can use spreadsheets for all the data manipulation you'll
need to do, and just assemble the pieces by hand.
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