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Date: Sun, 25 Sep 2011 07:07:37 -0700
From: Colin D Bennett <colin AT gibibit DOT com>
To: geda-help AT delorie DOT com
Subject: Re: [geda-help] Preferred way "Separate-but-equal" grounds
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On Fri, 23 Sep 2011 19:25:59 -0400
Bob Paddock <bob DOT paddock AT gmail DOT com> wrote:

> >> - I've got a mixed-signal board where I've got an AGND, PGND,
> >> and DGND which I want to be routed separately (different trace
> >> widths, etc). However, I want them to be connected at one
> >> point (that I would chose). What's the correct way to do this?
> >
> > So far, the "best" answer is: talk to your layout guy :-)
> >
> > There is no technical solution to this one in the geda/pcb
> > tools.
> 
> I use a zero Ohm resistor, with a footprint that will get covered
> in solder to short the two closely spaced pads.

I was going to say also you could put a trace on a pcb layer with
the no-drc attribute set so pcb doesn't complain, but I think that
no-drc only works for the pcb 'DRC' feature which is really only
about spacing and copper width, not about open/short connections
which is handled by 'o' optimize rats.  To me, they are both DRC
issues but should probably be two separate flag.

Regards,
Colin