Re: gEDA-user: Trace impedance calculations in PCB

[John Griessen <john@xxxxxxxxxxxxxx>]

Jeffrey Gregory wrote:
> Are there any plans to add trace impedance calculations to PCB?  

Not concrete ones yet that I've heard.

If not, is there an argument against it or just that no one has time
Time, the avenger.

  What alternatives do people use?

Some pcb action commands can get you a per trace extraction to
calculate simple area from, then apply heuristic mapping to
lumped param model of the line(s) in other tools.

There's pondering of not-existing-yet speedup tools like gsch2cap, pcb2cap
that will extract from schematic to gnucap, pcb layout to gnucap
based on selection and choice of capacitance model to use.

No one's thinking of extracting shapes of trace loops and modeling
mutual inductance, if that's what you mean...

John Griessen
-- 
Ecosensory   Austin TX


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