Re: [SI-LIST] : Bad IBIS models!

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From: Kim Helliwell (khelliwe@acuson.com)
Date: Wed Mar 15 2000 - 14:24:37 PST


Bob Perlman wrote:
>
> Kim -
>
> <on-target criticism of vendor-supplied IBIS models deleted>
>
> Let me add one item to your things-that-drive-me-crazy list: IBIS
> models in which the min/typ/max data sets are virtually the same,
> leading me to believe that the vendor either (1) has unbelievably
> good process control or (2) has failed to factor in the effects of
> best/worst case process, and maybe voltage and temperature, too.
> And it's hardly ever (1).

Yes! As opposed to: min/typ/max values *exactly* the same, which
leads one to suppose they were too lazy to bother with the process
corners at all. Take one measurement and call it good for all,
I guess.

I thought I would start something with this! :-)

-- 
Kim Helliwell
Senior CAE Engineer
Acuson Corporation
Phone: 650 694 5030  FAX: 650 943 7260

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