Hi Syed, Agree. We just have been debating this at DesignCon. Our point is that support for non-linear buffers should be added as an option. Vladimir -----Original Message----- From: Syed Huq (huqs) [mailto:huqs@xxxxxxxxx] Sent: Tuesday, February 09, 2010 11:10 AM To: Dmitriev-Zdorov, Vladimir; si-list@xxxxxxxxxxxxx Subject: RE: [SI-LIST] Re: Correction: Re: IBIS-AMI Vendor Support Help Importance: Low Hi Vladimir, I believe that the assumption made where the Tx and Rx Analog model is linear (I/V curves are straight lines and do not change in time) may be true for one semiconductor vendor but may not hold ground for many others. In that case, the modeling approach is flawed to begin with. -Syed -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Dmitriev-Zdorov, Vladimir Sent: Tuesday, February 09, 2010 9:57 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Correction: Re: IBIS-AMI Vendor Support Help Syed, A minor addition. The procedure outlined below (generating step and impulse from detailed SPICE level simulation) provides an accurate response that AMI models and EDA platform will update and then use in time domain simulation by way of convolution. At the simulation stage, we can use complete non-linear models of Tx/Rx analog buffers. However, a validity of superposition (by convolution) of the generated responses assumes that Tx and Rx analog models are linear and time invariant (e.g. buffers' IV curves are straight lines and do not change in time) Vladimir ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu