Hi Madhusudhan, For the single wire, one can use the formula for impedance as R+ j (w L - 1/(w C)), here j is sqrt(-1), w is angular frequency. The formula for RLC is given in the paper already sent to you. For two and more wires the mutual inductance and capacitance have to be considered. The problem becomes complex with coupling effects. . Thanks and Best Regards, M.P.Sengottuvel SI Analyst Caliber Infotech (INDIA) Pvt Ltd., 35/1, 10th Street, Gandhipuram, Coimbatore - 641012, Tamil Nadu, India. Tel: +91-422-2480146 Fax: +91-422-2490573 Mobile: +91-94432 35553 www.caliberinfo.net/.com -------------------------------------------------------------------------------- From: Madhusudhan Kulkarni [mailto:madhusudhan@xxxxxxxxxx] Sent: Thursday, November 16, 2006 9:24 AM To: M.P.Sengottuvel; 'Suresh' Subject: Re: [SI-LIST] Package SI Hi, Thanks for your information,but we have to cross check with 3D field solver using formulas, can you provide any formulas we can calaculate without tool. Regards Madhusudhan kulkarni ----- Original Message ----- ----- Original Message ----- From: Madhusudhan Kulkarni To: SI-List Sent: Wednesday, December 13, 2006 12:41 PM Subject: [SI-LIST] Package SI Hi all, I am new to package SI,how to calculate wirebond impedence for simulation? Pls provide me any documents regarding IC Package Simulation. Regards Madhusudhan ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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