[SI-LIST] Re: IBIS Model Quality (or lack thereof)
- From: Chris Cheng <chris.cheng@xxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 25 Mar 2002 14:18:10 -0800
Why use IBIS at all ?
If you are convinced that IBIS is not good enough (which I am), don't
simulate and just follow whatever the vendors design rules say. After =
all,
if you deviate from the rules based on your incorrect IBIS models, do =
you
think the vendor will really take responsibility if it doesn't work ? =
If you
follow the design rules, what value does the simulation add to you =
design ?
If you are serious enough to simulate, you must be working on something =
that
is unique about your own system that needs to be custom optimized =
beyond
what the component guideline can tell you. Get the SPICE model and do a =
good
job of modeling your own system. If a small little start up like mine =
can
get SPICE model from vendors, anyone can. Its just a matter of a few =
NDA and
extra effort.
-----Original Message-----
From: Todd Westerhoff [mailto:twester@xxxxxxxxxxx]
Sent: Monday, March 25, 2002 12:59 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] IBIS Model Quality (or lack thereof)
Hi all,
We have been doing a lot of comparisons between IBIS and HSpice models
lately, with a lot of less-than-satisfactory results.
I have an open question for the semiconductor suppliers among us:
What testing is performed after an IBIS model is created, to ensure =
that the
completed model behaves as expected? I'm interested in responses from
vendors that actually SIMULATE the IBIS model before distributing it =
for
customer use. It looks to me as though many of the models I've =
received
were never used in a simulation before being released ... and, as a
potential customer, I find that quite disheartening.
So the question is - what processes are being used to test IBIS models =
and
ensure they function properly before their release to customers?
As always, replies both on and off the list are greatly appreciated.
Todd.
Todd Westerhoff
Signal Integrity Engineer
Hammerhead Networks
5 Federal Street - Billerica, MA - 01821
email:twester@xxxxxxxxxxx - ph: 978-671-5084
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
"I=92m starting With the man in the mirror
I=92m asking him to change his ways
And no message could have been any clearer
If you wanna make the world a better place
Take a look at yourself, and then make a change"
- "Man in the Mirror", Michael Jackson
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