>
> You should question their reasons! If you have lots of things (IC's &
> connectors) which connect to all 3 planes (shorting them together with a
> via), you have effectively made one plane. Although the ground
> currents do
> not share (among the 3 planes) equally, the sharing will be hard to
> predict. And there will certainly be some 'filter current' on
> each of the
> 2 outer planes.
>
> Or, have I misunderstood what you do?
>
Richard,
I probably would question this interesting approach. I made a reference to
"voodoo" design in the past. This one qualifies, but if Jim's Customer is
paying the bill you question it with tact then do it
Mike Reagan
EDSI
Frederick Md
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