Jeffrey Gregory wrote: > Are there any plans to add trace impedance calculations to PCB? If > not, is there an argument against it or just that no one has time and > interest? What alternatives do people use? > > Best Regards, > Jeff
depends a little on what you want. If you want to know what widths you need on your traces to achieve a particular impedance then wcalc, http://wcalc.sf.net, is the way to go. Look for a new version in the next few days which adds a few more structures. You can also put in dimensions (2-d cross section) for a few selected structures and get back impedances. If you are looking for a more general purpose "here is my .pcb file, give me a netlist that models RLCK for the whole layout" then, no, we don't have anything like that. The closest we have there is PCB can export the files that NELMA needs to do some capacitance extraction. I've not used that feature so I can't comment on how well it works, run time, or accuracy. What do you have in mind? What should the calculations provide? How would you want to access them? -Dan _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
