Re: [SI-LIST] : IBIS model gives numerous errors

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From: D. C. Sessions (dcs@lumbercartel.com)
Date: Tue Apr 17 2001 - 06:29:47 PDT


On Tuesday 17 April 2001 05:40, Ingraham, Andrew wrote:
> > For your first question: This is a known feature with the V-I curves of
> > IBIS
> > models, which
> > are purposely made non-monotonic.
>
> Um, I know of no such feature in IBIS that causes V-I tables to be
> "purposely" non-monotonic!

It's because the actual output current is the superposition of the
pullup/pulldown and clamp currents. Because clamp currents are so
hideously nonlinear, subtracting them from the actual output current
may end you up with a small-region nonmonotonicity in the pullup or
pulldown tables.

-- 
| I'm old enough that I don't have to pretend to be grown up.|
+----------- D. C. Sessions <dcs@lumbercartel.com> ----------+

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