Hello Dhaval, You could check the following sections: 1> Section 4.4.4 (page 174), Howard Johnson..., High-Speed Digital = Design=A1K 2> Section 4.5 (page 97), Stephen H. Hall, et al, High-Speed Digital = System Design... 3> Section 6.11.11 (page 419), Howard Johnson..., High-Speed Signal = Propagation=A1K ... .. . Regards, Cortex -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] = On Behalf Of Dhaval Bhodia Sent: Tuesday, July 25, 2006 12:56 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] 90 degree turn in PCB tracks Dear Experts I want to know that why PCB tracks can not have 90 degree bend ? second why 45 degree bend is most preferable ? anybody has made any analysis on bending of PCB tracks ? what are the technical issues will come if some one makes 90 degree bend in PCB ? What are electrone and transmission line charasterisic stops to make that 90 degree turn in PCB tracks ?=20 Regards=20 Dhaval __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around=20 http://mail.yahoo.com=20 ------------------------------------------------------------------ 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: http://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: =20 http://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 =20 ------------------------------------------------------------------ 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: http://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: http://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