In the driver, or as a tap off of the T-coil? Some driver implementations place a programmable pullup termination on a T-coil tap and use the coil to compensate for excess driver capacitance.
Sent via DROID on Verizon Wireless -----Original message----- From: Mike Steinberger <msteinb@xxxxxxxxxx> To: tom@xxxxxxxxxxxxx Cc: ibis-macro@xxxxxxxxxxxxx Sent: Mon, Jan 17, 2011 19:40:09 GMT+00:00 Subject: [ibis-macro] Re: BIRD-124: Dependency tables - question? Tom-CML is the circuit configuration I referred to in my previous example, though I did tacetly assume pull-ups in the driver because that's what I usually see.
Thanks for the question. Mike S. On 01/17/2011 01:30 PM, Tom Dagostino wrote:
MikeWhat kind of driver technology are you referring to in your example here? I would have assumed CML?Regards, Tom Dagostino Teraspeed Labs 13610 SW Harness Lane Beaverton, OR 97008 503-430-1065 tom@xxxxxxxxxxxxx www.teraspeed.com Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 401-284-1827 www.teraspeed.com*From:*ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] *On Behalf Of *Mike Steinberger*Sent:* Monday, January 17, 2011 10:57 AM *To:* ibis-macro@xxxxxxxxxxxxx *Subject:* [ibis-macro] Re: BIRD-124: Dependency tables - question? Arpad-Every circuit node has a bias point. Some of the important circuit nodes are at the output of the driver, and other important circuit nodes (not directly visible from the IBIS model) are internal to the driver.You're referring exclusively to the circuit nodes external to the driver. There, the bias point is set by the biasing internal to the driver, and may also be affected by a _DC_ common mode termination voltage and _DC_ load impedance external to the driver, depending on the specific circuit design. This _DC_ bias
