RE: [IBIS-Users] Requesting for some help / information regarding the use of IBIS in SI simulation.

Andy,

Regarding "The order of the three elements (R,L,C)...", while what
you say is true, I don't think IBIS intended them to be a single
resistor, inductor and capacitor element in the package model. I
remember talking about a "T" or "PI" structure to make this "RLC"
model symmetric, but the specification doesn't mention any of
these options.

Thanks,

Arpad
====================================================================

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Andrew Ingraham
Sent: Tuesday, May 31, 2011 6:00 PM
To: ibis-users
Subject: Re: [IBIS-Users] Requesting for some help / information
regarding the use of IBIS in SI simulation.

In addition to the IBIS Cookbook, carefully read the documentation for
your simulator. Some simulators (or some versions of some simulators)
do not support package parasitics from the IBIS file, meaning that you
have to add those elements yourself, external to the IBIS model in the
simulator. Read your simulator's documentation to see if you need to
do this. As Arpad notes, they are low frequency lumped parasitics and
may get you only so far for doing high frequency SI. The order of the
three elements (R,L,C) is undefined because it makes little difference
at low frequencies.

Andy

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