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 ------------- 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 ------------- 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 ------------- Minutes by Mike LaBonte Next meeting: 18 Oct 2011 12:00pm PT Next agenda: 1) Task list item discussions ------------- IBIS Interconnect SPICE Wish List: 1) Simulator directives