One idea to consider is to start with a solid plane, and cut slots around the sensitive analog parts, like big C shaped moats, squares open on one side. You retain the "big ground plane" conductivity, but you prevent stray currents from using your analog area as a short-cut.
Each analog "chunk" can have it's own moat this way, too. If they're near the edge, just cut a thin slot from the edge in. Hmmm... this reminds me of the cubicle I used to work in :-P _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user