IBIS Macromodel Task Group

Meeting date: 22 Jan 2008

Members (asterisk for those attending):
  Ambrish Varma, Cadence Design Systems
* Arpad Muranyi, Mentor Graphics Corp.
  Barry Katz, SiSoft
* Bob Ross, Teraspeed Consulting Group
  David Banas, Xilinx
  Donald Telian, consultant
  Doug White, Cisco Systems
  Essaid Bensoudane, ST Microelectronics
  Ganesh Narayanaswamy, ST Micro
  Hemant Shah, Cadence Design Systems
  Ian Dodd
  Joe Abler, IBM
* John Angulo, Mentor Graphics
  John Shields, Mentor Graphics
  Ken Willis, Cadence Design Systems
  Kumar, Cadence Design Systems
  Lance Wang, Cadence Design Systems
  Luis Boluna, Cisco
* Michael Mirmak, Intel Corp.
* Mike LaBonte, Cisco Systems
  Mike Steinberger, SiSoft
* Mustansir Fanaswalla, Xilinx
  Patrick O'Halloran, Tiburon Design Automation
  Paul Fernando, NCSU
  Radek Biernacki, Agilent (EESof)
* Randy Wolff, Micron Technology
  Ray Comeau, Cadence Design Systems
  Richard Mellitz, Intel
  Richard Ward, Texas Instruments
  Sanjeev Gupta, Agilent
  Shangli Wu, Cadence
  Stephen Scearce, Cisco Systems
  Steve Pytel, Ansoft
  Syed Huq, Cisco Systems
  Syed Sadeghi, ST Micro
* Terry Jernberg, Cadence Design Systems
* Todd Westerhoff, SiSoft
  Vikas Gupta, Xilinx
  Vuk Borich, Agilent
* Walter Katz, SiSoft

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Call for patent disclosure:

- No one declared a patent.

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Opens:

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Review of ARs:

AR: Walter, Randy, Michael M. begin writing differential BIRD
- Done

- Michael M. : Summarize options/directions in a couple of for our
  differential feature enhancements
  - Done

- AMI BIRD authors meet to prove AMI BIRD can handle Mellitz cases
  - Todd reported that he and SiSoft are debating about how to disclose
    handling the linearity issues described in 2007 by Rich Mellitz.

- Mike S send non-proprietary information on studies he performed
  - Done

- EDA vendors: meet to decide differential BIRD direction
  - Decided last meeting

- Michael M. sketch new IBIS interconnect plan
  - In progress

- Walter coordinate completion of true diff BIRD draft
  - In progress

- Michael M. draft Eye keywords for true diff BIRD
  - In progress

- Randy draft derating keywords for true diff BIRD
  - In progress

- Arpad:  Write parameter passing syntax proposal (BIRD draft)
  for *-AMS models in IBIS that is consistent with the
  parameter passing syntax of the AMI models
  - TBD

- TBD:    Propose a parameter passing syntax for the SPICE
  - [External ...] also?
  - TBD

- Arpad:  Review the documentation (annotation) in the macro libraries.
  - Deferred until a demand arises or we have nothing else to do

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New Discussion:

Walter presented on Receiver Measurements:
- Walter, Randy, and Michael M. met last week.
- Walter presented an outline
- Randy presented [T_Vac]
  - Walter: slew rate units are not intuitive to work with
  - Suggestion: Give voltage and use "/1n" as the units.
  - Showing JESD79-3a spec
  - Questions about interpolation method between table points
    - JEDEC has Tvac discontinuity; jumps from 57ps to 75ps at 2.0V
    - Arpad: this may be a JEDEC typo; 75ps should be 57ps
  - Bob: These slew rates are within "groupings"
- Walter showed the "ac-ac  or dc-ac" conundrum
  - IBIS language for measuring slew in unclear
  - Faster slew signals need to stay longer above Vin_ac
  - The term "area" is used, but JEDEC does not measure that way
- Michael M.: These standards are commonly known by their bus names
  - Communication of context for a measurement is important
- Michael M. presented A Selection of Common Mode Requirements in Industry Specs
  - Discussion of USB 2.0 "Differential Input Voltage Range"
  - Walter: hard to find commonality in measurement names used
    - May need a cross reference across specs
  - Michael M.: SATA measures at connector
    - May have to define probe points there
  - Maybe we could use "test load" for PCI-X 
  - PCI-X Vp-p has to be measured over 1e6 UIs
    - DC is <30kHz
- Walter: If we find a well written standard we can use its terminology

- Next week we will discuss ICM links
- There will be no meeting Feb 5.

AR: Randy will investigate the JESD79-3a Tvac 57/75 "typo"

Next meeting: 29 Jan 2007 12:00pm PT

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