RE: [IBIS] Mismatch between ibischk and load lines

Hello Peggy,
 
as Arpad pointed out, there might be many reason that causes the ibischeck message.
 
but please be aware, that the checker is using the sum of the static curves .
 
so for High : [pullup] + [gnd clamp] + [power clamp]
and for Low : [pulldown] + [gnd clamp] + [power clamp]
 
 
regards
Eckhard

Mit freundlichen Grüßen / Best regards / Cordiali saluti / ystävällisin terveisin

Eckhard Lenski

Nokia Siemens Networks GmbH & Co. KG

NWS EP CP HW RD CAD libraries

Balanstr. 59

80240 München
Germany
phone : +49 89 5159 17080
email: eckhard.lenski@nsn.com

http://www.nokiasiemensnetworks.com/ibis

Nokia Siemens Networks GmbH & Co. KG

Sitz der Gesellschaft: München / Registered office: Munich

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________________________________

From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of ext Alavi, Peggy
Sent: Thursday, July 29, 2010 11:52 PM
To: ibis-users@eda.org; ibis@eda-stds.org
Subject: [IBIS] 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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