[IBIS] RE: [IBIS-Users] Mismatch between ibischk and load lines

Peggy,
 
It is difficult to guess what you may be doing wrong
without more detail about your buffer. For example,
does it have on die termination, how did you generate
the clamp curves (is there any double counting in them),
etc...
 
Arpad
========================================================

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Alavi, Peggy
Sent: Thursday, July 29, 2010 4:52 PM
To: ibis-users@eda.org; ibis@eda-stds.org
Subject: [IBIS-Users] Mismatch between ibischk and load lines

Hello,

I am working on an IBIS Model and the golden parser (I have used 4.1,
4.2, and 5.0 and my model is IBIS 4.2) gives me errors (on the high side
- pull up curve) on one of my outputs. I have independently verified the
load line and where it crosses the PD and PU curves, and the crossing
exactly matches my transient end values, and does not match what the
parser is claiming the crossings are. What could I be doing wrong?

Best,

-Peggy

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