Subject: RE: [IBIS] Question on Rising/Falling Tables...
From: Muranyi, Arpad (arpad.muranyi@intel.com)
Date: Thu Oct 24 2002 - 07:50:47 PDT
Brian,
You can either shift all of the waveforms so that they start
at zero (normalizing), but make sure you shift each curves by
the same amount, or you can repeat the first point of each
curve at t=0. However, this second fix may not work if this
leads to a long lead in section before the edge begins, because
the stimulus may be faster than the length of your waveforms
and then the buffer will be overlooked (i.e. may not switch).
Arpad Muranyi
Intel Corporation
=============================================================
-----Original Message-----
From: arsenault, brian [mailto:arsenault_brian@emc.com]
Sent: Thursday, October 24, 2002 5:51 AM
To: 'ibis@eda.org'
Subject: [IBIS] Question on Rising/Falling Tables...
> We've recently received a model from a semiconductor that has the
> Rising/Falling waveforms with the first datapoint at a time other than
> 0ns. While the IBIS spec states that this is OK, one of our tool vendors
> conversion utilities fails when reading the model. This passes IBISCHK3
> and imports into other tools fine.
>
> My question is, if this was your model and the model vendor wasn't fixing
> it, how would you handle it?
>
> Thanks for the help.
>
> Brian
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