Go to http://www/polar.co.uk download the CITS25 field solver Raymond Smith Sr. PCB Design Tellium Oceanport, NJ http://www.tellium.com Tellium.... Smarter, Faster, Optical Networks -----Original Message----- From: Tamir Ben Shoshan [mailto:[log in to unmask]] Sent: Thursday, March 15, 2001 3:34 AM To: [log in to unmask] Subject: [DC] Impedance equation Hello, We are having new design that force us to work with a trace with different width to keep the required impedance. Could you please suggest where can I find the Impedance equation to calculate it manually. Regards, Tamir. ---------------------------------------------------------------------------- ----- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------