Minutes, IBIS Quality Committee

10 Mar 2009

11-12 AM EST (8-9 AM PST)

ROLL CALL
  Adam Tambone
  Anders Ekholm, Ericsson
  Barry Katz, SiSoft
  Benny Lazer
  Benjamin P Silva
  Bob Cox, Micron
* Bob Ross, Teraspeed Consulting Group
  Brian Arsenault
* David Banas, Xilinx
  Eckhard Lenski, Nokia Siemens Networks
  Eric Brock
* Guan Tao, Huawei Technologies
  Gregory R Edlund
  Hazem Hegazy
  Huang Chunxing, Huawei Technologies
  John Figueroa
  John Angulo, Mentor Graphics
  Katja Koller, Nokia Siemens Networks
  Kevin Fisher
  Kim Helliwell, LSI Logic
  Lance Wang, IOMethodology
  Lynne Green
* Mike LaBonte, Cisco Systems
  Mike Mayer, SiSoft
* Moshiul Haque, Micron Technology
  Muniswarareddy Vorugu, ARM Ltd
* Pavani Jella, TI
  Peter LaFlamme
  Randy Wolff, Micron Technology
  Radovan Vuletic, Qimonda
  Robert Haller, Enterasys
  Roy Leventhal, Leventhal Design & Communications
  Sherif Hammad, Mentor Graphics
  Todd Westerhoff, SiSoft
  Tom Dagostino, Teraspeed Consulting Group
  Kazuyoshi Shoji, Hitachi
  Sadahiro Nonoyama
* Liqun, Huawei

Everyone in attendance marked by *

NOTE: "AR" = Action Required.

-----------------------MINUTES ---------------------------
Mike LaBonte conducted the meeting.

Call for patent disclosure:

- No one declared a patent.

AR Review:

- Mike look into MeetingPlace issues
  - Waiting for WebEx provisioning to be completed.

- Mike propose IBISCHK bug for 5.5.6
  - TBD

New items:

Continued review of the IQ specification:

6.8.	{LEVEL 3} Open_sink/Open_source model not push-pull

- David: C_comp is very important for timing
  - David presented on this topic at the last IBIS summit
  - Commented out values for C_comp in additional modes are recommended
  - A problem is that this can't model bus turn-around in one simulation
- We updated 5.6.2 and 5.6.2 to capture this, and deleted 6.8.
- All of section 6 is now deleted

AR: Mike post updated IQ specification document

Section 7: Correlation
-Mike: We should take a quick look at what we have in section 7
   - Then look at David's document on correlation
- This section may have been written by Bob Haller
- Bob: It is tied to the IBIS Accuracy Handbook
- David: Single metric correlation is not sufficient
  - Feature-selective correlation is more useful
  - It is more useful with both overlay and envelope methods

- Mike: We should discuss the work of David and Roy next week

- Mike: We seem to be competing with the IBIS Accuracy Handbook
  - David: We should reference it and build upon it
- Bob: Some vendors do correlation
  - It is usually comprehensive, covering several things at once
- How do we reference the Accuracy Handbook?
  - Is it more useful for the overlay method?
  - Bob: We don't want to spend a lot of time reinventing things
  - We can describe methodologies, but leave it to the vendor in the end
- Moshiul: Many vendors mention the overlay metric
  - It makes sense to reference the Accuracy Handbook
- Guan: SPICE correlation is not valuable for users
  - It is difficult to get SPICE models
  - Bench correlation should be included in our document
  - The Accuracy Handbook is very detailed
    - It should cover bench measurement
- Moshiul: In the DDR2/3 JEDEC specs pullup/pulldown I/V boundaries are given
  - Mike: Usually we correlate in the time domain
  - Moshiul: You can never duplicate fixtures exactly

Next meeting: 17 Mar 2009 11-12 AM EST (8-9 AM PST)

Meeting ended at 12:08 PM Eastern Time.