Dan McMahill wrote: > If my traces were carrying ground referenced analog signals I wouldn't > want the power plane being my "ground" plane. > > And yes, I've seen a real life case with some rather frustrating > behavior that the correct stackup totally fixed. There was a moment of > clarity when a bypass cap way on the other end of the board made a much > larger than expected difference. Would you mind elaborating on this? I could imagine a scenario where the power plane could be a source of AC noise - especially if components aren't bypassed adequately. The AC noise could then couple to the signal traces in its quest to complete a low impedance circuit. Is this what you observed, or am I way off?
-Ethan _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user