Re: gEDA-user: pcb, howto partition power planes?

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

I agree with Niel, I separate my ground planes with a symbol for a power
inductor. I do this at the schematic level and then I read the layout
suggestions typically provided by the A/D data sheet on where to connect
the planes. For the fab I put in the power inductor foot print. You can
then use the power inductor or not. You can leave it open or you can
short it.

I also do similar activities for power supplies separating the board
power from board sections. Makes it very easy to debug the board from
one section to the next.

Steve Meier


On Mon, 2008-10-27 at 19:47 +0200, Duncan Drennan wrote:
> >> I typically deal with this by separating the planes at the schematic
> >> level using a bead-core inductor.
> 
> > Yes, I also have GND and AGND in my schematics.
> 
> Don't put inductors between ground planes, connect them at a star
> point. If you are going to use inductors then have them on the power
> side, not between grounds.
> 
> > How do I best divide a copper area (physically) into subsections with
> > complicated shape/outline.
> 
> Is there a good way to do this with PCB? It would be relatively easy
> if planes could be handled as negatives, i.e. everything you see is
> NOT there. Then it is just a matter of moving a line.
> 
> 
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