Minutes, IBIS Quality Committee

13 September 2011

11:00-12:00 EST (08:00-09:00 PST)

ROLL CALL

Cisco Systems:                * Tony Penaloza
Ericsson:                     * Anders Ekholm
Green Streak Programs:          Lynne Green
Huawei Technologies:            Guan Tao
IBM:                            Bruce Archambeault
                              * Greg Edlund
IOMethodology:                  Lance Wang
Mentor Graphics:                John Angulo
Micron Technology:              Moshiul Haque,
                                Randy Wolff
Nokia Siemens Networks:       * Eckhard Lenski
QLogic Corp.:                   James Zhou
Signal Consulting Group:        Tim Coyle
Teraspeed Consulting Group:   * Bob Ross
Texas Instruments:              Pavani Jella
unaffiliated:                 * Mike LaBonte

Everyone in attendance marked by *

NOTE: "AR" = Action Required.

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

Call for opens and IBIS related patent disclosures:

- Mike: Have a meeting conflict for Sept 20
  - We will skip that week 
  (NOTE: This has since been corrected to Sep 27)

AR Review:

- James send presentation to Mike for posting
  - Done
  - Eckhard: The drafts should be numbered

- Mike add descriptions to AMI checklist
  - Some changes made

- Mike add QUAILs to Mantis
  - Nothing new

- Bob conduct tests of parser behavior for test keywords
  - TBD

AR: Mike number AMI presentation drafts from James

New items:

Mike showed the updated IBIS-AMI checklist:
- The sections and items are now hierarchically numbered
- Mike: What does Syntax mean here?
  - The IQ approach is that there is one syntax check: it must pass IBISCHK
- Mike: What does the 1.6 check mean?
- Greg: A regular IBIS buffer must be present
- Mike: Does IBISCHK check .ami files referenced from .ibs files automatically
- Bob: It will automatically check .ami files but not the other way
- Mike: If [Algorithmic Model] is missing we would never know
- Bob: This is like automatic checking of .pkg files
- Greg: This was mentioned in Opal
  - Is there another way to have analog models?
- Anders: Yes, any vendor could implement another scheme
- Bob: There is an issue because this is not standardized
- Mike: Is this only for TX?
- Anders: The termination is often an s-param
  - Agree with Bob that there is an issue
- Greg: Today you need IBIS because s-params are not supported without ISS
- Anders: Have not seen an AMI model that uses only an IBIS model
- Mike: It sounds like the EDA tool needs setup outside of IBIS
- Anders: Yes
- Greg: If an s-param TX model is used how is the rise time modeled?
- Mike: Walter has talked about using an impulse input
  - The s-param would spread the signal over time
- Bob: He proposed a triggered PWL source
  - There was discussion over what the input impedance should be
  - What is missing is precision in the IBIS-AMI spec

Checklist item 1.7:
- Bob: This is part of the jitter discussion
  - This may have been dropped
- Greg: We could table this until it is more certain
- Eckhard: IBIS page 186 has bit time for the Init function
  - The TX and the RX could want different sample rates
- Greg: The DLL may have trouble if the sample rate is something unexpected
- Mike: Is the input data time stamped?

Checklist item 1.2:
- Bob: Labels were an Opal extension, not IBIS
  - This should be deleted
- Eckhard: IBIS page 140 says "one of the leaves can be Labels"
- Bob: The Table BIRD clarifies that further
  - We should drop it for now
  - It will probably be in 5.1
  - The parser developer got hung up on this
- Mike: Should these checks be for 5.1 only?
  - We could come up with some rules for Labels
  - They just aren't in the 5.0 spec
  - We could check the number of items

Next meetings:
- Next meetings Sep 20 and Oct 4

Sep 20 agenda:
- Continued IBIS-AMI checklist review

Meeting ended at 12:20 Eastern Time.