Minutes, IBIS Quality Committee

20 July 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:

- No one declared a patent.

AR Review:

- Mike contact Antonio Orlandi about problems using FSV1D
  - Lance was able to reproduce the problem on WinXP
  - Mike sent an email late

New items:

Mike: We need to revisit our goals
- Bob: If the FSV1D tool is unreliable that diminishes it's usefulness
  - We might contact them in Europe next year
  - The freely available status of the tool is uncertain
  - We also have the method put forward by David and Roy
- Mike: The fix may be easy
  - The response may help determine the free status

Mike showed the FSV1D manual:
- Mike: In our spec should we use the terms ADM, FDM, GDM?
- Bob: No
- Mike: How many pages will it take to describe this in our spec?
- Bob: We need to mostly reference their tool
- Mike: We should show:
  - Input TD data
  - FFT
  - 6 bar graphs
- Bob: The numerics are divided between DC shift and higher freq effects
- Mike: Would a +10mV high offset and a -10mV low offset come out as zero?
- Bob: No they use the absolute difference

Mike: We should allocate ARs to write material for the spec
- Mike: For example someone could write the Recommended Test Fixtures
- Bob: Physical or simulation?
  - We may not want to go into
- Mike: Arpad ran tests showing that IBIS waveform fixtures matter
- Lance: I have experience using Arpad's IBISCenter model
  - In some cases point reduction caused correlation problems
  - The problems will be at the turning areas where transitions begin and end
- Bob: Had the same experience
  - You can't have 2 points making a straight line
  - The tools don't model it right
  - It is best to add intermediate points even if it is linear
- Mike: You also should not need 40 points all on a straight line
  - The curve fitting mostly needs to know it becomes straight at the ends
- Bob: This is not always a curve fitting issue
- Mike: They form a spline model
  - The coefficients of the 3 I/V curves directly add up
- Bob: This mucks up the effective impedance
- Mike: This is more of an Accuracy Handbook discussion

- Moshiul: It is mostly up to the developer
  - They might use the timing test load, for example
- Mike: That is a good load to use because it will be simulated to get timing
- Moshiul: You also should have some kind of transmission line in there

Mike: Maybe the FSV1D tool could be enhanced to read Golden Waveforms
- Bob: The may not have a student free to do that work

Mike showed the outline for our correlation spec
- Mike: This outline may need some rework to be more useful to us
  - It was developed some time ago by Pavani and me
  - Parts of it are not clear at this point
  - For example, do we need a section for package correlation?
  - It might be best for two of us to work on this between meetings

AR: Moshiul and Mike meet to improve the correlation spec outline

Next meeting will be August 3

Meeting ended at 12:01 PM Eastern Time.
