Hi, I am trying to find some guidelines concerning choosing the capacitor that is the center tap of two series resistors that form a differential termination. If my information is correct, the combination either of the resistors and the center tap capacitor, forms an AC common mode termination. Is there a difference between choosing a center tap capacitor used in this way and choosing a capacitor for an AC termination? This inquiry is directed towards the reduction of radiated emissions. The signals in questions have a rise time of about a nanosecond. Thank You Tom Cipollone ------------------------------------------------------------------ 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