Hi Zhengrong, I suggest you review my recent IBIS paper on package modeling techniques and usage. Here is the link on the IBIS website: http://www.vhdl.org/pub/ibis/summits/feb08/chitwood.pdf Thanks, Sam -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of xuzhengrong Sent: Thursday, April 17, 2008 11:15 PM To: si-list@xxxxxxxxxxxxx Cc: yang@xxxxxxxxxx Subject: [SI-LIST] a question about IBIS package information Hi all, There are simplified RLC packages in IBIS package information. How do vendors extract that? Are the RLC models extracted at a certain frequency? If that, what is the general frequency? Appreciate anything for the problem. Best Regards, Zhengrong ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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 technical documents are available at: http://www.si-list.net 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