Subject: RE: IBIS techniques for Pre-emphasis ?
From: Peters, Stephen (stephen.peters@intel.com)
Date: Mon Sep 10 2001 - 10:38:42 PDT
Hi Michael:
The issue of modeling a buffer with data stream pre-emphasis has been
raised before with respect to modeling the latest SCSI buffers. It is
possible to model a buffer with data stream dependent pre-emphasis, although
there are limitations and caveats. For the details, refer to several
presentations at the June IBIS summit.
Click on
http://www.eda.org/pub/ibis/summits/jun01/
then go to the readme for a list of the presentation. I believe you want the
ones from Larry Barnes, Hegazy and Bob Ross.
Regards,
Stephen Peters
Intel Corp.
-----Original Message-----
From: Mirmak, Michael [mailto:michael.mirmak@intel.com]
Sent: Monday, September 10, 2001 8:42 AM
To: 'ibis-users@eda.org'
Subject: IBIS techniques for Pre-emphasis ?
All,
A lot of buffer designs are beginning to include pre-emphasis to enhance the
strength of drivers for certain types of data pattern (a notable older
example is EIA/RS-485). [Driver Schedule] and [Submodel] keyword sections
can be used to add "boosts" to driven signals, but not necessarily in any
way related to a particular signal pattern.
At present, are there any known techniques for including pre-emphasis in
IBIS buffers? If not, are there plans to do so in IBIS 4.x/IBIS-X?
Thanks!
- Michael Mirmak, Intel Corp.
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