interesting infos and articles, are there these or similar articles into German somewhere in the web?
Harald > -----Urspr�ngliche Nachricht----- > Von: DUTTON Phil [mailto:[EMAIL PROTECTED]] > Gesendet: Dienstag, 5. M�rz 2002 04:58 > An: 'Protel EDA Forum' > Betreff: Re: [PEDA] controlled impedance traces ? > > > Have a look at UltraCAD's website. Lots of useful info and a > calculator. > > http://www.eskimo.com/~ultra/calc.htm > > There is much to consider when designing high speed boards. > Find from your fab shop the layer spacing of the build that > you are using. > distance above reference plane and track thickness will produce your > impedance. > (only scraping the surface) > hope this helps, > > Phil. > > > -----Original Message----- > From: rimas [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, 5 March 2002 13:37 > To: Protel EDA Forum > Subject: [PEDA] controlled impedance traces ? > > > hi there, > > i suppose this question doesn't have to do with protel > specifically, but i > was hoping someone could answer it for me or at least point > me in the right > direction. (i'm not a full time PCB layout person by the way) i'm > presently laying out a board with a big xilinx fpga and a > gigabit ethernet > phy chip on it. the datasheet for the gigabit chip says that the > connections between chips need to be done with 50 ohm impedance > traces. how do i calculate the impedance of a trace ? it > seems like trace > width and stackup order are the only two variables i have to > play with. i > am planning to have protos of this board made by advanced > circuits, in case > that makes any difference. > > thanks for any help, > > -rimas > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
