Does Anyone Know the Formula to calculate the Impedance of a Edge Coupled Diff Pair (Stripline) I know the info must be out there somewhere but I have not found it yet. I am looking to Build a Spreadsheet calculating pair impedance with varying parameters. Thanks In Advance Al Owens ------------------------------------------------------------------ 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