Doug: I asked the same question a year or so ago. You could try the following Maxim app note for a start. http://pdfserv.maxim-ic.com/arpdf/AppNotes/6hfan6011.pdf The real theory behind this can be found in "Digital Communication" by Lee and Messerschmitt. It makes good bed time reading. Regards, Kai Keskinen Signal Integrity Advisor Solectron Technical Center 425 Legget Drive, Kanata, ON K2K 2W2 kaikeskinen@xxxxxxxxxxxxx www.solectron.com > "This message may contain information proprietary to Solectron so any unauthorized disclosure, copying or distribution of its contents is strictly prohibited." -----Original Message----- From: Doug Brooks [mailto:doug@xxxxxxxxxx] Sent: Thursday, November 07, 2002 12:17 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Equalization of transmission lines? The keynote speaker at PCB East 2002 was Dr. Henri Merkelo, Director Ultrahigh Speed Digital Electronics, atSpeed Technologies Corporation. He gave an interesting presentation showing how absorption losses in dielectrics could result in eye diagrams that were virtually closed. But, with the addition of basic RC equalization circuits, the losses could be compensated for, and normal eye diagrams restored. Can anyone refer me to other articles or presentations that are available on the web that discuss this type of issue? I'd like to learn more about it. Doug Brooks ____________________________________________________________________________ ___ UltraCAD Design announces availability of its new book "Signal Integrity Issues in PCB Design" Details at www.ultracad.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