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IBIS INTERCONNECT MODELING AD HOC TASK GROUP MEETING MINUTES
Meeting Date: February 21, 2007

http://www.eda.org/ibis/adhoc/interconnect/

Mailing list: ibis-interconn@freelists.org

Attendees:
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(* denotes present)
Agilent                    - Radek Biernacki*, John Moore*
Cisco Systems              - Mike LaBonte*
CST                        - Fabrizio Zanella*
Intel                      - Michael Mirmak*
Mentor Graphics Corp.      - John Angulo*
Micron Technology          - Randy Wolff*
Teraspeed Consulting Group - Bob Ross* 

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Next Meeting:
Wednesday, March 7, 2007

               Telephone     Bridge   Passcode
              916-356-2663      5     942-3915

LiveMeeting Details:

  Subject: IBIS Ad Hoc Interconnect Meeting
  Meeting URL: https://www.livemeeting.com/cc/intel/join
  Meeting ID: DFMK69
  Meeting Key: 6@+-H9Rd8


Agenda:
- Final review of IIRD9
- Review of updated Touchstone(R) draft 

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No opens were raised.

During review of the latest revision of the Touchstone(R) update draft,
Fabrizio inquired about adding frequency-dependent reference impedances.
Michael noted that this had been tabled after previous discussions 
indicated it wouldn't be needed.  However, the team did note that the use
of frequency-dependent or independent references placed a computation
burden on the EDA tool vendor (in the former case) or the model provider.
In order to keep the format compact, the team agreed to maintain independent
references.

The team reviewed the list of suggested Touchstone(R) changes from Radek
Biernacki (to be posted to the website).  Michael agreed to update the 
document with the editorial changes suggested.  The major changes were
discussed item-by-item.  These included clarifying normalization, so that
normalization, if used, would be separate from the reference impedance if
the option line was overridden.  Additionally, the team agreed that no
line length limits would be enforced, so long as keywords and new data sets
(starting with frequency points) begin at the start of new lines.

The team also agreed that CSV data was not to be supported.  Additionally,
valid decimal syntax was to be clarified, in the style of IBIS, at the
beginning of the document.


ARs
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Sam     - provide a simple drawing of "virtual reference" case
Michael - update IIRD9 draft with changes for final review next time - DONE


Team Objectives:
1) complete ICM-IBIS linking BIRD and any associated changes to the 
   ICM specification
2) update the ICM specification, if needed, to clarify the mapping of 
   ICM nodes to S-parameter ports
3) complete a specification for "Touchstone Plus" or similar 
   industry-standard definition for Touchstone-like files, to include 
   complex impedance references, removal of limits on the maximum number 
   of ports and per-port impedance references