In message
<d250d01e39356a4e9cc3b4b459d6655097e0e...@ms-cda-01.advanced-input.com>,
dated Thu, 19 Dec 2013, "McInturff, Gary" <gary.mcintu...@esterline.com>
writes:
Not really practical above a few KHz or so. Above that parasitic
capacitance grounds at lots of points. For audio it works but for high
speed electronics not so much
I'm talking about conductive connections, which are usually the source
of this sort of EMI problem. If in the OP's case, the errant layer had
not been connected to chassis, the emissions would not have occurred.
I agree that consecutive layers in a stack have considerable capacitance
between them and that is where the EMI gets from the 'dirty' plane to
the 'clean' one.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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