[SI-LIST] Re: [!! SPAM] Re: 6 layers stackup

While we are all talking about bypass caps, I just got done reading a book
by Bruce Archambeault called "PCB Design for Real-World EMI Control". In the
book there is a chapter on bypassing and it shows measurements from actual
test boards. In one case, a certain percentage of the caps are "high ESR"
which seems to result in substantial damping (reduction) of the resonances.
The high ESR caps are described as ceramic capacitors with a series resistor
built into the package, I have been unable to find such a part. Has anybody
found a benefit to this approach and a source for high ESR capacitors?

Thanks - Joel
 


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