                                             
IBIS Macromodel Task Group

Meeting date: 11 Oct 2011

Members (asterisk for those attending):
Agilent:                    * Fangyi Rao
                              Radek Biernacki
Altera:                     * David Banas
Ansys:                        Samuel Mertens
                            * Dan Dvorscak
                            * Curtis Clark
Arrow Electronics:            Ian Dodd
Cadence Design Systems:       Terry Jernberg
                              Ambrish Varma
Celsionix:                    Kellee Crisafulli
Cisco Systems:                Ashwin Vasudevan
                              Syed Huq
Ericsson:                     Anders Ekholm
IBM:                          Greg Edlund
Intel:                        Michael Mirmak
LSI Logic:                    Wenyi Jin
Mentor Graphics:            * John Angulo
                              Zhen Mu
                            * Arpad Muranyi
			      Vladimir Dmitriev-Zdorov
Micron Technology:            Randy Wolff
NetLogic Microsystems:        Ryan Couts
Nokia-Siemens Networks:       Eckhard Lenski
QLogic Corp.                  James Zhou
Sigrity:                      Brad Brim
                              Kumar Keshavan
                            * Ken Willis
SiSoft:                     * Walter Katz
                              Todd Westerhoff
                              Doug Burns
			    * Mike LaBonte
Snowbush IP:                  Marcus Van Ierssel
ST Micro:                     Syed Sadeghi
Teraspeed Consulting Group:   Scott McMorrow
                            * Bob Ross
TI:                           Casey Morrison
                              Alfred Chong
Vitesse Semiconductor:        Eric Sweetman
Xilinx:                       Mustansir Fanaswalla

The meeting was lead by Arpad Muranyi

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

- None

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

- None

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Review of ARs:

- Arpad look for Table column type issues in BIRD 127.2
  - Done

- Arpad check on AMI_parameters_out exceptions and maybe send email
  - Done

- Arpad update BIRD 127
  - Done

AR: Mike check on posting of BIRD 127.3 draft

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New Discussion:

Backchannel BIRD:
- Ken: It has not been changed for a while
  - We need to finalize any remaining issues
- Arpad showed the BIRD draft
- Ken: We should move crosstalk issues into a separate BIRD
- Walter: This should be submitted to the Open Forum to get a BIRD number
  - Vendors can check for compliance and deal with problems as found
  - We should have done this for AMI 4 years ago
  - There is no rush to get approval
- Ken: No issue with that
- Bob: That is a misuse of the BIRD process
  - It would have zero status
- Walter: It would be under revision control
  - People would know they do it at their own risk
- Ken: The only reason not to submit is if there is a known flaw
  - We know of none now
- Bob: The rules for pattern definition are not well defined

Arpad showed BIRD 127.3:
- Arpad: This calls for Type to have multiple values
  - Some notes have been removed to avoid confusion
  - Added a reference to section 3.1.2.7 because we separated
    AMI_parameters in and AMI_parameters_out
  - Added explanation of AMI_parameters_out string formation
    - This needs to be reviewed
- Walter: It looks fine but needs study
  - The parser should check for multiple Type values if version is 5.1
  - Even a list of values is a single value if between one set of parentheses
- Arpad: This is not a technical issue
- Bob: We should add note 9 on page 6
  - Description is optional but it might be construed as required here

Arpad showed SamplingRateBIRD_03.txt:
- Arpad: Sample rate is discussed in three places
  - The sample_interval parameter is introduced
- Walter: Some models only work at certain block sizes
  - We should have the same wording for that
- Arpad: Should that be an independent BIRD?
- Mike: They are somewhat related
  - The sample_interval factors into the number of samples sent to Getwave
- Arpad: We will postpone this to another meeting

BIRD 123:
- Arpad: It should be bumped up to a different number
- Walter: It will 123.5 rev locally, submitted to Open Forum as 123.3

Corner issues:
- Walter: IBIS has a good definition of slow/weak and fast/strong.
  - It does not require tools to use them
  - AMI corners match the defined derivation methods
  - Typ is the 1st value, slow 2nd, fast 3rd
- Walter showed his recent email on the subject
- Walter: The term "it is permissible" in section 9 should be changed
  - Anything that is Format Corner has to do with the derivation method
- Arpad: What about C_comp?
- Walter: A new C_comp parameter such as Bob's proposal would be valid
- Bob: Agree, but analog models might have C_comp
- Walter: AMI models can not use regular IBIS models
  - There are more than 3 corners
  - Touchstone can be used
- Arpad: It is still allowed in 5.0
- Walter: It only makes sense with parameterized ISS subcircuits
- Arpad: We need to move on to discussing 5.2

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Minutes by Mike LaBonte

Next meeting: 18 Oct 2011 12:00pm PT

Next agenda:
1) Task list item discussions

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IBIS Interconnect SPICE Wish List:

1) Simulator directives
