DATE: September 10, 1996
SUBJECT: 9/6/96 EIA IBIS Open Forum Minutes
VOTING MEMBERS AND 1996 PARTICIPANTS LIST:
AMP Hank Herrmann*, Tim Minnick, Russ Moser,
Ray Ziesse*
Cadence Design C. Kumar*
Contec CAE, Ltd. Dileep Divekar*, Norio Matsui, Antonis Orphanou
Cypress Bruce Wenniger
Hewlett Packard, EEsof Karl Kachigan, Henry Wu
HyperLynx Kellee Crisafulli
INCASES Olaf Rethmeier*, Ralf Bruening
Intel Corporation Stephen Peters*, Will Hobbs, Arpad Muranyi*,
John Keifer, Aaron Tang, Duane Quiet,
[Donald Telian], Jim Kruchowski
Interconnectix, Inc. Bob Ross*, Chris Reid
Meta-Software (Sanjay Gangal)
Mitsubushi Tam Cao, Hoang Nguyen
Motorola Ahmed Omer*
National Semiconductor Syed Huq*, Donald Snyder, Chune-Sin Yeh,
Bill Aronson
NCR (formerly ATT-GIS) Dave Moxley, Richard Mellitz
NEC (Hiroshi Matsumoto),
Quad Design Jon Powell*, Chris Rokusek*
Quantic Laboratories (Mike Ventham)
Texas Instruments Roger Cline, Ben Andresen, Sri Jandhyala,
Tareq Shahwan, Dan Phipps
Thomson-CSF/SCTF (Jean LeBrun)
UniCAD Canada Ltd. Celso Faia
Veribest Ian Dodd, David Wiens
VLSI Technology Dick Ulmer, Sung Oh*, Swami Gangadharan,
Daniel Kim, Tom Dockery, D.C. Sessions*,
Hrish Patel*
Zuken-Redac (John Berrie)
OTHER PARTICIPANTS IN 1996:
Alcatel John Fitzpatrick*
Altera Vadim von Brzeski
Apteq Design System Dan FitzPatrick
Compaq Mark Leonard
Digital Equipment Corp. Jeff Chu*
EIA Patti Rusher
IC Works Eric Chen
Mentor Graphics Kim Owen*
Micron Technology Brian Johnson
MicroSim Ralph Perez
Molex Gus Panella*
North Carolina State U. (Michael Steer)
Oki Semiconductor Tom Chao
Philips Semiconductor Mike Magdaluyo
Rockwell Collins Thomas Thurman
S3, Inc. Sarathy Sribhashyam, Phap Duong
Seimans Nixdorf Arnaud Lacariere
Symmetry Andy Hughes
Tektronix, Inc. Brock Hannibal
TRW & Free Model Foundation Robert Harrison
VTC, Inc. Bob Ward
Zeelan Technology George Opsahl
In the list above, attendees at the meeting are indicated by *. Principle
members or other active members who have not attended are in parentheses.
Participants who have joined another organization are in square brackets.
Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as
follows:
Date Bridge Number Reservation # Passcode
9/27/96 (916) 356-9200 3-54604 9558683
10/18/96 (916) 356-9200 3-54605 8249548
All meetings are 8:00 AM to 9:55 AM Pacific Time. We try to have agendas out
7 days before each open forum and meeting minutes out within 7 days after.
When you call into the meeting, ask for the IBIS Open Forum hosted by Will
Hobbs and give the reservation number and passcode.
NOTE: "AR" = Action Required.
-------------------------------- MINUTES -------------------------------------
INTRODUCTIONS
Ray Ziesse of AMP joined to get familiar with the committee. Eventually he
will be taking over representation from Hank Herrmann.
Kim Owen of Mentor Graphics is involved with model support and his main
concern is model availability.
EIA MEMBERSHIP AND TREASURER'S REPORT
Bob Ross reported that Veribest joined per minutes correction below, and
Quantic Laboratories is listed again as a member since the payment issue
has been resolved.
Bob received the July report which shows $9,285 after DAC expenses. The
June report was $10,468. The August report is not yet available.
MINUTES REPORT, MISC.
No corrections were reported, but the following two corrections have been made
to the July 19, 1996 minutes per e-mail communication:
Ian Dodd reported that Veribest was changed to full voting member status
because payment had been received.
Patti Rusher corrected "EIA Server Corp" to "Electronic Industries Service
Corporation" and stated she said she expected a draft proposal in two weeks
instead of next week regarding DARPA funding.
All AR's have been completed with the exception that Bob Ross has not issued
BIRD35.2.
MISCELLANY/ANNOUNCEMENTS
None.
PRESS UPDATES
Syed Huq reported "SPICE and IBIS Modeling Kits The Basis for Signal
Integrity Analysis" by Roland H.G. Cuny in the EMC: Silicon to Systems
Symposium Record by the IEEE EMC Society, 1996.
In Electronic Engineering Times, September 2, 1996, four articles mention IBIS:
(1) "Part 3: Physical Design EDA TOOLS", Richard Goering, pg. 41.
(2) "Workstation Board Pushes SI Envelope", Alex Pappas and Phil Treen, pg. 46.
(3) "Signal-integrity Tools Deliver for MP Servers", Richard Mellitz and David
Moxley, pg. 48.
(4) "IBIS Standard Provides I/O Buffer Models", Bob Ross, Syed Huq, and Jon
Powell, pg. 52.
WEB PAGE UPDATES
Jon Powell reported adding links from the official EIA/IBIS Home page to
publicly available IBIS models. He requests people to report new sites and
any out of date or better links. Jon updates the page weekly.
(Not reported - the EIA site also links to the contacts.txt document which
also gets updated regularly.)
Bob Ross reported that Quality Semiconductor has IBIS Models on
http://www.qualitysemi.com/devices.htm
The Micron link was changed to the site reported at the last meeting, and the
Model Request Form link appears inactive.
Syed Huq looked into URL promotion on www.submit-it or www.postmaster of
the EIA/IBIS website. Both locations support various search engines, but
require a fee. Jon suggested to try Alta Vista or Yahoo which he thinks
does not require a fee. The sense of the Committee is not to pay for
registration.
NEW MODELS
Bob Ross reported that Motorola has some Fast SRAM models available via e-mail
and Motorola also plans to put them on a Web page.
OPENS FOR NEW ISSUES
Hank Herrmann - AMP patent
Bob Ross - EDIF 4 0 0
Bob Ross - Design SuperCon97
AMP PATENT
Hank Herrmann alerted the EIA/IBIS Committee regarding a patent held by AMP:
AMP holds a patent that relates to the current IBIS work on coupled multi-line
connector models (BIRD36: Electrical Board Description). It covers the process
of using a coupled multi-line connector model with a simulator in order to
optimize the wiring configuration of the interconnection.
Hank advises anyone interested to obtain a copy and review it. The patent
specifics are as follows:
Patent # 5,081,602
Title: Computer Simulator for Electrical Connectors
Inventor: Douglas W. Glover
Assignee: AMP Incorporated
Hank adds that AMP Incorporated has not yet decided on their position
regarding this patent. A position statement is owed to the IBIS Open Forum.
If there are any questions regarding this patent, they should be directed to:
Mr. Bruce Wolstoncroft
The Whitaker Corporation
Phone: (302) 633-2745
EIA/JAPAN - IBIS WORKING GROUP
Jon Powell reported that EIAJ appears to be attempting to form a group for
a new standard. They want one that includes SSO and coupled packaging
effects.
IEC EXPRESS FUNDING PROGRESS
No report. IBIS Version 2.1 has been forwarded to IEC.
EE TIMES ARTICLE
As Bob Ross noted, above the Electrical Engineering Times article on IBIS has
been published. The IBIS committee officers served as the co-authors on
on behalf of the committee, but Bob wishes to thank C. Kumar, Stephen Peters
and Patti Rusher for providing review and feedback.
AR - Bob Ross seek permission (if necessary) and post to submitted draft text
of the EE Times article on vhdl.org.
EDIF 4 0 0
Bob Ross reported that Alan Williams of the University of Manchester provided
the syntax for inclusion of IBIS models and for reporting passive R, L, C
element values to simulators, per the official IBIS Committee technical
comment. Bob concurred with the proposed syntax, and Alan Williams has
forwarded EDIF 4 0 0 to EIA.
DESIGN SUPERCON97
Bob Ross asked whether we should plan for a face-to-face meeting with Design
SuperCon97 in San Jose at the end of January. Last year, it worked well to
have the meeting on Monday prior to Design SuperCon96. The consensus was yes.
Syed Huq indicated that National Semiconductor would be glad to host the
meeting again. Other companies can also volunteer to host the meeting. Bob
indicated that the IBIS Committee could probably assist in the funding.
S2IBIS2
Per ibis-users reflector discussion, Syed Huq noted that s2ibis version 2.091
had a different syntax than s2ibis version 1.3, and he had some questions. He
received a several public and private responses. Syed proposed compiling a
list of workarounds. He feels more complete documentation is needed.
Meanwhile, he is still relying on s2ibis Version 1.3
BIRD37.1 - ENHANCEMENT OT THE PACKAGE MODEL SPECIFICATION
Bob Ross moved the BIRD37.1 discussion next since it was being considered for
vote. Bob and Stephen Peters reaffirmed that it was a technical extension to
the already approved BIRD28.3 to add Begin Fork and End Fork syntax for
"stubs" in packages.
Jon Powell cautioned that while he did not object to BIRD37.1, we should
understand the technical limitations of this extension with respect to
coupling.
C. Kumar also felt that the single line extension was useful, but felt that
the coupling mechanism did not support SSO effects because the matrices were
not constructed to take this into consideration. Furthermore, the format
may not support processing for SSO. Bob and others did not fully understand
nor agree with the technical nature of this objection since detailed
technical discussion is difficult during conference telephone meetings.
Kumar also advocated a simpler and less ambitious goal consistent with
"first order" modeling including limiting the number of stages.
Hank Herrmann indicated that properly extracted global matrices can be
processed, and algorithms exist to reduce them for single line processing.
Hank also indicated that as a result of symmetrical matrix assumptions,
analysis information was available for coupling.
Technical discussions continued. Since we traditionally have accepted
technical BIRDs by unanimous vote, we decided not to vote on BIRD37.1.
Bob stated that there have been no publicly reported models that have
coupled matrices (per IBIS Version 2.1), nor coupled matrix sections
(per BIRD28.3). The committee recommended that BIRD37.2 be produced to
remove reference to coupled matrix sections (while still containing the
single coupled matrix for Version 2.1 compatibility). The single line
extensions were viewed as important. Bob noted that the approval of
such a modification to BIRD37.2 would supersede the matrix section
extensions approved in BIRD28.3.
AR - Stephen Peters provide BIRD37.2 which removes the matrix section
portions of BIRD37.1 while still maintaining compatibility with Version 2.1.
BIRD36 - ELECTRICAL BOARD DESCRIPTION
Because of the relationship with BIRD37.1, Bob Ross moved the discussion of
BIRD36 next. Stephen Peters questioned whether we were still bound by
the matrix coupling mechanisms described in BIRD36 (which are identical
to BIRD37.1). Without detailed discussions, the coupling mechanisms could
be revisited. Gus Panella suggested that nodal syntax be considered. Bob
indicated that this was a valid suggestion, but cut the discussion off since
the topic has been extensively discussed, and it would consume valuable time
to re-open the discussion here. Bob indicated that BIRD36 could also be
applied to complicated, single packages, filling in for the functionality
dropped in the future BIRD37.2.
Bob also noted that the Committee really has three choices with respect to
the coupling issue: (1) come to a consensus with respect to a coupled matrix
extension, (2) do nothing with respect to coupling and let the simulator
companies deal with coupling using their own, unique approaches, i.e., chose
not to extend the Standard in this direction at this time, and (3) provide an
alternative proposal which reaches consensus.
Hank Herrmann inquired whether comments since June had been included. Stephen
Peters noted that there was no general objection to the comments. Bob noted
that since BIRD36.1 has not been issued, the comments have not formally been
included.
BIRD34.1 - STORED CHARGE EFFECT
Bob Ross reaffirmed that the proposed TT mechanism was intended only to
provide a first order method to mimic a known stored charge effect. An
alternative is to provide a capacitance versus voltage table so that the
format is in place for future effects as technology evolves. Bob felt this
is too detailed for the intended application, would be too cumbersome to
populate thereby rendering it as a virtually useless extension, and would be
inconsistent with some simplifying assumptions already embedded within the
IBIS model architecture regarding where a the series resistance is modeled.
Dileep Divekar added that such a table would could be in error because of the
conservation of charge issues related to how algorithms would be forced to
process this information. Dileep noted that the proposed TT parameter allowed
ways to process this information while preserving conservation of charge.
D.C. Sessions inquired whether the TT parameter was intended just for the
entire dynamic voltage range. Bob intended it to be used just for the
clamping regions.
Because BIRD34.1 has been out for quite a while with no formal objections
nor counter proposals, we plan to vote on it at the next meeting.
BIRD35.1 - MULTI-STAGED OUTPUTS
Bob Ross just received Jon Powell's sample syntax and intends to produce
BIRD35.2 to be consistent with the IBIS syntax and conventions and supportive
of Jon's application. This may not be done by next meeting.
AR - Bob Ross produce BIRD35.2.
BIRD38 - ABSOLUTE MAXIMUM VOLTAGE AND EGG12 - SPECIFICATION ADDITIONS
As time ran out Bob Ross followed up on Jon Powell's previous suggestion
to set up a committee to handle all specification enhancement issues off-line.
Members consist of John Fitzpatrick, Ahmed Omer, Jon Powell, and Bob. Anyone
else can join. A telephone conference meeting was scheduled on Tuesday,
September 24, 1996 at 8 A.M..
AR - Bob Ross set up telephone conference meeting and notify committee members
of details. [Done]
Date Bridge Number Reservation # Passcode
9/24/96 (916) 356-9200 3-54603 8565793
EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING
No discussion.
NEXT MEETING:
The next meeting is on Friday, September 27, 1996, 8:00 A.M. to 9:55 A.M.
BIRD34.1 is scheduled for vote.
==============================================================================
NOTES
IBIS CHAIR: Bob Ross (503) 603-2523, Fax (503) 639-3469
bob@icx.com
Modeling Engineer, Interconnectix, Inc.
10220 SW Nimbus Ave, K4, Portland, OR 97223
VICE CHAIR: Syed Huq (408) 721-4874, Fax: (408) 721-4785
huq@rockie.nsc.com
Staff Applications Engineer, National Semiconductor, M/S A-2595
2900 Semiconductor Drive, Santa Clara, CA 95052
LIBRARIAN: Jon Powell (805) 988-8250, Fax: (805) 988-8259
jonp@qdt.com
Transmission-Line Products Manager, Quad Design
1385 Del Norte Rd., Camarillo, CA 93010
SECRETARY: Vacant
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==============================================================================
Received on Tue Sep 10 12:27:08 1996
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