Hello Everyone, I thought it may be appropriate to mention on this thread some work that Ansoft has been doing with Xilinx on high speed channel modeling. For those who have an in-depth interest, please visit http://www.gigabitbackplanedesign.com to download the design kit which includes a white paper and the Xilinx Virtex-II Pro X MK322 test board channel model. In the past, engineers often solved the physical layout effects separate from the circuit, making it tedious and time consuming to investigate bends and other structures quickly and easily. New technology has made it possible to create parameterized EM discontinuity models and dynamically link them into a full channel circuit (please refer to the attached screen shot). This provides very fast exploration of the physical effects of bends, vias, and other discontinuities on the circuit or system. Furthermore, since the speed of EM solvers is always a concern for circuit designers, the ability to interpolate between previously solved EM data makes it possible to simulate changes in "real time". Lastly, previous work on the XFP consortium, Cray Computer, and other work have indicated to us that 3D discontinuities (vias, connectors) will usually be the bandwidth limiting factor in the channel. Effects from bends may not be significant until the data rate reaches 10 Gbps or faster. Hope this is helpful. best regards, -mike -- ----------------------------------------------------------------- Michael Brenneman Ansoft Corporation Application Engineering Manager Western Region 5300 Stevens Creek Blvd. Suite 650 San Jose, CA 95129 phone: 408-261-9095 x31 fax: 408-261-1245 ----------------------------------------------------------------- Ansoft Corporate Headquarters Four Station Square Suite 200 Pittsburgh, PA 15219 phone: 412-261-3200 fax: 412-471-9427 --------------------- http://www.ansoft.com --------------------- -- Binary/unsupported file stripped by Ecartis -- -- Type: image/gif -- File: bend_in_channel.gif ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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