====================================================================== IBIS INTERCONNECT TASK GROUP MEETING http://www.eda.org/ibis/interconnect_wip/ Mailing list: ibis-interconn@xxxxxxxxxxxxx ====================================================================== Next meeting: Jan. 16, 2013 8 AM US Pacific Daylight Time Agenda: Attendance Call for Patents Agenda and Opens Survey from D. Banas/Feedback from "Quiet" Participants Next Meetings' Schedule/Agenda: · Jan. 23 · No meeting Jan. 30 - DesignCon · Feb. 6 For international numbers, please contact Michael Mirmak. ......................................................................................................................................... Join online meeting https://meet.intel.com/michael.mirmak/QZ193W0C First online meeting? [!OC([1033])!] ......................................................................................................................................... <--- Reservationless Bridge - Do not edit or remove --- 916-356-2663, 8-356-2663, Bridge: 2, Passcode: 8625431 Speed dialer: inteldialer://2,8625431 -----------------------------------------------------------------> Note: in case of issues with Lync we will use the WebEx noted at the bottom of this message ====================================================================== Attendees, Jan. 9 Agilent Technologies Radek Biernacki* Altera David Banas* ANSYS Luis Armenta*, Steve Pytel Cadence Design Systems Brad Brim*, Ambrish Varma Intel Michael Mirmak* Mentor Graphics Arpad Muranyi* Micron Technology Justin Butterfield*, Randy Wolff* Qlogic Jason Zhou Signal Integrity Software Walter Katz* Teraspeed Consulting Group Bob Ross* Minutes No patents were declared. No opens were raised. Michael Mirmak summarized Walter Katz's motion regarding EMD. Walter stated that this motion would be eventually raised formally, but after discussion. Arpad Muranyi quickly presented his IBIS-ATM workgroup slides, including the 4 questions summarized. Arpad also showed a transfer function representation of model. Radek suggests not using "transfer function" as a phrase to describe [Model] operation. Bob Ross noted that, in one version of model, the CCCSs connect the supply and the output. In the model diagram showed by Arpad, the currents are from the two supplies but the whole transition is controlled digitally. What you get at the outputs is actual voltages. Walter stated that [External Model] treats the "whole thing" as a digital input model. Walter's position is that, for an AMI buffer model, when it is operating, a buffer can be an intermediate state, not just 0 or 1. David Banas asked about the impact on bandwidth. In the slide, the green block implies an impact on DC, yellow block has an impact on AC. Walter replied that the yellow boxes show the risetime of the input silicon/its bandwidth. Bob Ross and David Banas disagreed. Bob believes AMI TX is correctly represented by Arpad's slide 12. Walter summarized his position/provided his Dec. 19 overview presentation. For AMI models, the approach should be really different than for non-AMI cases. A differential S4P is to be used for on-die interconnect and buffer capacitance. Brad Brim stated that there is no difference between AMI and non-AMI model handling, except that Touchstone is used for AMI and SPICE used for non-AMI. Walter responded that, for non-AMI cases, non-linear IV curves, etc. can be used for the model itself. In the case of AMI, the buffer is either a 50 ohm resistor (to ground or in series). Brad asked whether a Touchstone S4P used with [Model] has reference impedances. Walter showed his AMI modeling recommendations (page 8 in his Dec. 19 on-die modeling presentation). Arpad asked, in response to page 8, where the ports are for an S-parameter representation. Radek Biernacki added that this needed to be defined. Walter noted that the S4P, on the input side, assigns 1 port to 0.5+TX_GetWave, with 1 port assigned to 0.5-TX_GetWave. Bob asked, for AMI, whether the frequency response of the output of the transmitter is determined by C_comp, or the analog input ramp. Walter replied that the S4P file replaces C_comp. Next time, attendees who have not previously presented are asked to state their preferences for [Model] treatment. ====================================================================== In case of Lync issues only, we will switch to WebEx as noted below. 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