Tim, I think you are more concerned with the characteristics of the driver than the physical of the T-lines. Then why not use U element? Defining a T-line with level=3 plev=1 elev=3 is very handy and you don't have to face the traditional T element problems. Regards, Raymond timoceous <timoceous@xxxxxxxxx> on 15/10/2003 10:32:28 Please respond to timoceous@xxxxxxxxx To: si <si-list@xxxxxxxxxxxxx> cc: (bcc: Raymond Leung/sdc) 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