Minutes, IBIS Quality Committee

23 March 2010

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
  Lijun, Huawei
  Lynne Green, Green Streak Programs
* 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
  Tim Coyle, Signal Consulting Group
  Todd Westerhoff, SiSoft
  Tom Dagostino, Teraspeed Consulting Group
  Kazuyoshi Shoji, Hitachi
  Sadahiro Nonoyama

Everyone in attendance marked by *

NOTE: "AR" = Action Required.

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

Call for opens and IBIS related patent disclosures:

- Bob: The role of this committee is to produce specifications for approval
  - The Open Forum must approve to be official IBIS
  - They are unlikely to become ANSI standards
  - Not sure if the cookbook and handbook are official

- Mike: The outline document created with Pavani's help has been found

- No one declared a patent.

AR Review:

- None

New items:

Mike showed previous documents related to correlation:
- David's FSV paper
  - Mike: It has 2 voltage and time domains
- Lance: For Vol/Voh it should compare what IBIS got against SPICE
  - It overlooks the shape of the waveform near the switching
  - Bruce Archambault showed us a method that looks at the whole wave
- Mike: There may be a place for both methods
- Moshiul: It still gives an idea

Mike showed Guan Tao's Measurement Correlation presentation:
- Lance: They check real board measurements against IBIS
  - If it correlates the IBIS model becomes golden
- Mike: This tests far more than the IBIS model
- Page 10:
  - Mike: This is similar to David's recommendations
  - Moshiul: What is "High level valid pulse?"
  - Mike: That may be the time above Vih
    - That is a good test
- Page 9:
  - Moshiul: There are places where the waveform differences are large
    - But the correlation by what they measure still is good
    - This is like an envelope metric

- Mike showed the IBIS Correlation outline:
  - Mike added F/V/T domains for FSV
- Mike: Driver I/V strength may not be important
- Moshiul: We check this frequently
  - We compare against the datasheet if it has it
- Mike: ODT is important
- Moshiul: We mostly check the ODT strength at Vtt
  - Checking the whole range would be good
- Mike: Do we need to correlate clamp I/V curves?
  - Eckhard: Clamps need to be accurate for PCI bus
- Mike: Receiver Output correlation might be going too far
- Moshiul: agree
- Mike: We should be able to describe most fixtures with [Test Load]
  - If not, maybe a BIRD is needed to extend [Test Load]
- Moshiul: Sometimes test boards are used
  - [Test Load] may not be enough
- Mike: EMD will be worked on this year
- Moshiul: Will that replace ICM?
- Bob: The ATM group's first priority is AMI

AR: Mike post updated outline of IBIS Correlation Handbook

Next meeting will be Mar 30

Meeting ended at 12:20 PM Eastern Time.