Is there a good resource/document for addressing the concerns in bussing 48V power in a multilayer board? The recently popular 12V or lower intermediate bus approach has limitations as voltages get lower and current gets higher. There appears to be new approaches of using a higher bus voltage (24V or 48V) for distribution since this was explored in the 80's with the advent of distributed power and now more recently with VoIP type designs. Any assistance appreciated ------------------------------------------------------------------ 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