IBIS Macromodel Task Group

Meeting date: 18 May 2010

Members (asterisk for those attending):
  Adge Hawes, IBM
  Ambrish Varma, Cadence Design Systems
* Anders Ekholm, Ericsson
* Arpad Muranyi, Mentor Graphics Corp.
  Barry Katz, SiSoft
* Bob Ross, Teraspeed Consulting Group
  Brad Brim, Sigrity
  Brad Griffin, Cadence Design Systems
  Chris Herrick, Ansoft
  Chris McGrath, Synopsys
* Danil Kirsanov, Ansoft
  David Banas, Xilinx
  Deepak Ramaswany, Ansoft
  Donald Telian, consultant
  Doug White, Cisco Systems
* Eckhard Lenski, Nokia-Siemens Networks
  Eckhard Miersch, Sigrity
  Essaid Bensoudane, ST Microelectronics
* Fangyi Rao, Agilent
  Ganesh Narayanaswamy, ST Micro
  Gang Kang, Sigrity
  Hemant Shah, Cadence Design Systems
  Ian Dodd, consultant
  Jerry Chuang, Xilinx
  Joe Abler, IBM
* John Angulo, Mentor Graphics
  John Shields, Mentor Graphics
  Ken Willis, Sigrity
  Kellee Crisafulli, Celsionix
  Kumar Keshavan, Sigrity
  Lance Wang, Cadence Design Systems
  Luis Boluna, Cisco Systems
* Michael Mirmak, Intel Corp.
* Mike LaBonte, Cisco Systems
  Mike Steinberger, SiSoft
  Mustansir Fanaswalla, Xilinx
  Patrick O'Halloran, Tiburon Design Automation
  Paul Fernando, NCSU
  Pavani Jella, TI
  Radek Biernacki, Agilent (EESof)
* Randy Wolff, Micron Technology
  Ray Komow, Cadence Design Systems
  Richard Mellitz, Intel
  Richard Ward, Texas Instruments
  Samuel Mertens, Ansoft
  Sam Chitwood, Sigrity
  Sanjeev Gupta, Agilent
  Scott McMorrow, Teraspeed Consulting Group
  Shangli Wu, Cadence Design Systems
  Sid Singh, Extreme Networks
  Stephen Scearce, Cisco Systems
  Steve Kaufer, Mentor Graphics
  Steve Pytel, Ansoft
  Syed Huq, Cisco Systems
  Syed Sadeghi, ST Micro
  Ted Mido, Synopsys
  Terry Jernberg, Cadence Design Systems
* Todd Westerhoff, SiSoft
  Vladimir Dmitriev-Zdorov, Mentor Graphics
  Vikas Gupta, Xilinx
  Vuk Borich, Agilent
* Walter Katz, SiSoft
  Wenyi Jin, LSI Logic
* Zhen Mu, Mentor Graphics

------------------------------------------------------------------------
Opens:

- Mike L: The IQ group has an interest in the ISS spec
  - It might allow more flexible circuits for a future [External Test Load]
    keyword

--------------------------
Call for patent disclosure:

- No one declared a patent.

-------------
Review of ARs:

- Arpad:  Rework AMI flow diagram
  - Done

- Mike:   Compile comments on ISS from minutes
  - Done

- 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

-------------
New Discussion:

Arpad showed the updated AMI flow diagrams:
- Arpad: Happy with this arrangement
- Slide 1:
  - This incorporates most if not all comments
  - The first 2 pages are about statistical analysis
  - the rest are time domain
  - The reason boolean inputs are retained:
    - So boxes don't move around from page to page
    - Shows the expected inputs for statistical analysis
  - Note 2 rule added: GetWave_Exists always treated as false
  - Mike L: Is there a better way to say "StatEye type analysis"?
    - The Ts for GetWave_Exists might be Xs
  - Todd: "Statistical analysis" will do
    - StatEye does something more specific, but there should be no confusion
  - Arpad: The change to "statistical" is OK
    - Would rather leave the Ts (True) to clarify how we treat it
  - Todd: It has to be clear that the model has to be configured a certain
    way to support statistical
  - Arpad: We said we would ignore Use_Init_Output for statistical analysis
    - That is a detail
- Slide 2:
  - Arpad: This is indicating convolution of waveform
  - Fangyi: Why is the box repeated?
  - Arpad: It is less cluttered that way
- Slide 3:
  - Arpad: The statistical box is gone from bottom here
    - Rx Init output goes to EDA tool convolution
    - Have to run Rx convolution twice
  - Todd: This assumes digital input to Tx GetWave?
  - Arpad: Probably
  - Fangyi: It says that
- Slide 4:
  - Arpad: Mostly the booleans change from the previous slide
- Slide 5:
  - Arpad: This is the most complete - both GetWaves
    - Again no statistical box
    - This is time domain
- Slide 6:
  - Arpad: This has just the truth table

- Arpad: It needs the correct text explanation
- Walter: After thorough review I think this flow is correct
- Todd: This shows analytical flows
  - We must not infer that statistical is valid only in that one case
- Arpad: The grayed out boxes are the indication
- Todd: Maybe "StatEye" is better for slide 1
- Fangyi: Statistical has some ambiguity
  - Maybe "probability" is OK
- Arpad: "Statistical" might be ambiguous
  - There may be a new form of analysis at some point
- Todd: "Statistical" is OK

Arpad: Fangyi had commented about a flow issue:
- Fangyi: It comes to the same conclusion
  - When Use_Init_Output=true it emphasized return impulse is not passed
    into the next step
- Todd: Change "it is" to "they are" in note 2

Arpad: Looked at ISS meeting minutes
- Arpad made a short list of significant items
- Mike L: Looking at the ISS document, it has obvious format problems
- Arpad: I will send out my comments
- Bob: There are artifacts and open questions embedded
- Walter: That all needs to be done
  - We should be able to ask for a content review by all of IBIS
- Mike L: This is not like the formal BIRD process
  - We are not keeping it secret
- Arpad: By finishing in subcommittee we would avoid a can of worms
- Bob: Not concerned about too much review
- Walter: We might formulate a plan for this at the upcoming summit
- Arpad: We should find a technical writer to handle this
  - Then we could focus on AMI
- Walter: Wonderful idea
- Bob: We should be able to just tidy it up a bit
  - We are just capturing a portion of HSPICE
  - Would like someone to volunteer to clean this up
- Walter: We have 3 more meetings before the summit
  - SiSoft would like to preview our summit presentation here
  - We should focus on getting the flow approved
  - Also decide on what our committee will present
  - The summit can help us decide how to proceed
- Arpad: I will continue working on the flows

Next meeting: 25 May 2010 12:00pm PT

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IBIS Interconnect SPICE Wish List:

1) Simulator directives
