[IBIS-Users] IBIS model check

Hi All,

I have a general question: How does one check if the IBIS model provided has
correctly generated data. I ask this because, I was recently working on a
model which I thought was generationg unneccesarily high voltage levels
(point-to-point). To test I had just connected the IO model I had to itself,
without any interconnects in-between and found the voltages to be beyond the
spec levels. I understand that the model impedance might not be matched to
the load value the data was generated for, but was just wondering how one
could make sure.

Regards,
Indira.

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On
Behalf Of Muranyi, Arpad
Sent: Wednesday, August 17, 2005 9:43 AM
To: ibis-users@eda.org
Subject: RE: [IBIS-Users] Mixed-Signal Analog IO ?


If that's what you need to model a band gap device,
you can also consider a pair of IV curves in the
clamp tables.  Those are always on, whether the
model drives or receives, and you can make a
voltage divider with two appropriately shaped and
sized IV curves.

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

-----Original Message-----
From: Tom Dagostino [mailto:tom@teraspeed.com]
Sent: Wednesday, August 17, 2005 9:34 AM
To: Lars Snith; Muranyi, Arpad
Cc: ibis-users@eda.org
Subject: RE: [IBIS-Users] Mixed-Signal Analog IO ?

...
...
...
For a voltage output like the output of a band gap reference make a voltage
divider using a terminator model whose values give you the Thevenin
equivalent for the output impedance of the part you are trying to model.

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