IBIS Macromodel Task Group Meeting date: 20 September 2022 Members (asterisk for those attending): Achronix Semiconductor: Hansel Dsilva Amazon: John Yan ANSYS: Curtis Clark * Wei-hsing Huang Cadence Design Systems: * Ambrish Varma * Jared James Google: Hanfeng Wang GaWon Kim Intel: * Michael Mirmak * Kinger Cai * Chi-te Chen Alaeddin Aydiner Keysight Technologies: Fangyi Rao Majid Ahadi Dolatsara * Ming Yan Radek Biernacki Rui Yang Luminous Computing David Banas Marvell Steve Parker Mathworks (SiSoft): Walter Katz Mike LaBonte Micron Technology: * Randy Wolff * Justin Butterfield Missouri S&T * Chulsoon Hwang * Yifan Ding Rivos Yansheng Wang SAE ITC Michael McNair Siemens EDA (Mentor): * Arpad Muranyi Teraspeed Labs: * Bob Ross Waymo: Zhiping Yang Zuken USA: * Lance Wang The meeting was led by Arpad Muranyi. Randy Wolff took the minutes. -------------------------------------------------------------------------------- Opens: - None. ------------- Review of ARs: - Chulsoon to send the Pre-driver PSIJ Sensitivity BIRD draft to the ATM list - Done. -------------------------- Call for patent disclosure: - None. ------------------------- Review of Meeting Minutes: Arpad asked for any comments or corrections to the minutes of the September 13th meeting. Michael moved to approve the minutes. Ambrish seconded the motion. There were no objections. -------------- New Discussion: PSIJ BIRD draft (Chulsoon): Arpad commented to add "_" in subparameter names. Subparameter names should not have spaces. Bob commented to make "e" in "edge" lowercase in the subparameter names. Arpad asked how general is this concept. Can it be applicable to multiple buffer technologies? Chulsoon responded that it has been validated in single-ended CMOS buffers so far. Bob asked, for example, is this valid for ECL? Randy asked for feedback on the inclusion of the equations and references. The references will need to be removed but can remain in the BIRD notes. Bob thought it was good to include the equations. Randy noted they have tested some available technology, but other technologies would be up to model makers to prove that this PSIJ modeling technique is relevant. Randy noticed the BIRD may need to make a statement about alignment of values with corner and not magnitude. PSIJ frequency domain proposal (Kinger): Kinger noted the keywords are optional. Groupings can be used for technologies. PSIJ may be different for particular operation modes. Grouping was added in the latest draft. Kinger said there was internal company debate about whether to design based on DC or multiple frequencies. He thought more than DC impact is necessary for modeling PSIJ. [Voltage List] was added and is optional and used to reference power rails defined under the [PSIJ Sensitivity Group]s. Randy noted the curve shown in the BIRD is confusing, since the corresponding [PSIJ Sensitivity] table has much fewer data points. If it is necessary to include the curve it should be listed as a figure with more explanation. Bob commented that a simplified curve may be more appropriate to include as a figure. Chulsoon asked if there was a LDO circuit included in the response. Kinger commented that the whole PDN of the system is included. Chulsoon asked about the inclusion of the Tx and Rx in the same interface. Kinger noted this is a holistic approach. Randy asked if the keywords are scoped at a Component level versus a Model level. Arpad noted it seemed related to the Pin Mapping level. Bob thought it was a top-level under Component. Arpad asked what is included in a circuit block. Kinger responded that this could include the pre-driver, digital blocks, and final driver, all on the same power rail. Bob commented a Model level may be different circuits but referencing pins is at the Component level. Bob asked about the curve summation from Kinger's summit presentation. Kinger noted some curves are a multiplication and some are additive. The final result characterizing multiple circuits is the result included in the new keyword. Standard Power Integrity Model (SPIM) in IBIS (Kinger): Kinger noted the latest draft includes changes based on comments from Bob. Some [End *] keywords were added. Bob thought there might need to be a [Chip SPIM Group] keyword in the .ibs file. This would help relate the .ibs file and the .spim file. One or multiple groups could exist under a Component. Kinger plans to send out a draft 2 once it is cleaned up and after further discussions with Bob. - Bob: Motion to adjourn. - Randy: Second. - Arpad: Thank you all for joining. AR: ------------- Next meeting: 27 September 2022 12:00pm PT ------------- IBIS Interconnect SPICE Wish List: 1) Simulator directives