Tim, I'm not sure how to do specifically what you want but I can tell you its very easy to use Welements instead of Tlines and enter your actual board stackup to the field solver and get either differential striplines or microstrips in Hspice. Thats what we use. We have a whole series of 1,2,3,5,10 line microstrip and stripline templates. We use these for xtalk simulations as well. If you want more info on this let me know. I'll pass it on. Steve Waldstein swldstn@xxxxxxxxxxxx -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of timoceous Sent: Tuesday, October 14, 2003 8:32 PM To: si Subject: [SI-LIST] Hspice differential Tline Hi Guru, I would like to know if there is a way to connect the hspice "T" element (ideal) to model differential transmission line. For instance, model a pair of LVDS Tline. I have tried but got lots of reflection/ringing at the output. Here is what I have tried: T1 Doutp GND VOP GND Z0=100.0 TD=500E-12 +IC=0.0 0.0 0.0 0.0 T2 Doutn GND VON GND Z0=100.0 TD=500E-12 +IC=0.0 0.0 0.0 0.0 Rpa VOP VON 100 Note: Doutp/n are the LVDS driver output. Thanks in advance, Tim __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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