RE: [IBIS-Users] General question on IBIS and SSO simulations

Good question, Ray. I hope we can begin a good discussion on utilizing
today's IBIS models to model SSO noise. My answer is yes, it will be
very useful if I can get full parasitic information of power and ground
nets in packages.

Regards,

Fabrizio Zanella
Signal Integrity
Enterasys Networks
Andover, MA
Phone: 978-684-1340
fzanella@enterasys.com

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Ray Anderson
Sent: Friday, January 07, 2005 3:51 PM
To: ibis-users@eda.org
Subject: [IBIS-Users] General question on IBIS and SSO simulations

After working on Power Distribution issues at the PCB level for quite a
number of years I'm now tasked with upgrading our company's IBIS models
with respect to package parasitic modeling. As an aid in coming up to
speed on some of the issues involved I have a general question in
regards to utilizing IBIS models to simulate SSO noise issues.

I've reviewed a number of the presentations and papers on the IBIS
website from past Summits and other sources and have come away with a
mixed message regarding the usefulness of IBIS in modeling SSO. I am
trying to determine if it will be useful to our customers if we provide
full parasitic information for the power and ground nets in our parts.
Can that RLC information effectively be utilized in IBIS simulations to
produce useful results? From what I've read, some authors contend that
IBIS models are adequate to model SSO problems if proper package
parasitic data and on chip capacitance data is provided while it seems
that some others tend to question whether it can be done today with the
present state of IBIS.

Any comments and/or advice on the topic will be most welcome.

Raymond Anderson
Senior Signal Integrity Staff Engineer
Xilinx Inc.
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Received on Mon Jan 10 09:51:51 2005