Specifically, how would they want to set up and run simulations? The answer, in SiSoft's opinion, is to specify values for control parameters that correspond as closely to the actual hardware as possible. I would offer one slight twist: I think what they really want is to be able to manipulate the AMI model simulation control in a way that is analogous to the use model of the hardware, which their chip design tool presents them with. That use model, of course, can be very different than the actual hardware itself. -db From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Todd Westerhoff Sent: Friday, January 20, 2012 1:03 PM To: IBIS-ATM Subject: [ibis-macro] Analog Buffer model - the User's viewpoint All, One of my colleagues here brought up a good point today - how the end-user interacts with the model. How do we expect that the user wants to interact with an IBIS-AMI model? Specifically, how would they want to set up and run simulations? The answer, in SiSoft's opinion, is to specify values for control parameters that correspond as closely to the actual hardware as possible. Obviously a deep and broad subject, of which I want to comment only on one small slice: how it relates to analog modeling. Let's assume we have a model where the output impedance (static impedance, as Scott defined it) varies considerably depending on the TX output swing setting. We expect that the user wants controls that lets them set the output swing and EQ settings in a way where the mapping to hardware settings is obvious, with the model/simulator figuring out to configure the details of the model. Chances are, the analog model to be used will change as a function of the output swing and EQ settings selected. If we're using subcircuit (as proposed by BIRD 116) or Touchstone (as proposed by BIRD 144) methods, either the equivalent circuit parameters (BIRD 116), or the Touchstone file selection (BIRD 144) will have to change, depending on how the user sets the input controls. I believe BIRD 116 & dependency tables can fulfill this requirement, but I'm not sure that BIRD 144 (as currently proposed) can do this. Todd. -- Todd Westerhoff VP, Software Products SiSoft 6 Clock Tower Place, Suite 250 Maynard, MA 01754 (978) 461-0449 x24 twesterh@xxxxxxxxxx www.sisoft.com<http://www.sisoft.com/> "It doesn't matter what you've heard Impossible is not a word It's just a reason For someone not to try" -Kutless ________________________________ Confidentiality Notice. This message may contain information that is confidential or otherwise protected from disclosure. If you are not the intended recipient, you are hereby notified that any use, disclosure, dissemination, distribution, or copying of this message, or any attachments, is strictly prohibited. If you have received this message in error, please advise the sender by reply e-mail, and delete the message and any attachments. Thank you.