Hi, I am wondering how I might "measure" the Output Buffer delay for a differential output. For a single-ended device, I would use the Rref,Cref, and Vref load and measure the time it takes the output to reach Vmeas. However, for a differential output that swings from -400mV to 400mV, how would I measure the Output Buffer Delay? A differential output is defined single-ended in IBIS, so for example an LVDS differential output might have a Rref of 50 Ohms (100 Ohms differential) and a Vref of 1.25 V. (The Vos of the device) Would I use this test load to get the Output Buffer Delay? Can simulators like XTK and SpecctraQuest "apply" this delay to the differential signal? In Signal Explorer (in SpecctraQuest), if I use the single-ended Output Buffer Delay, this is the same buffer delay that shows up for my differential signal. Thanks, Tim ------------------------------------------------------------------ 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 archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu