[SI-LIST] Power filtering

Not sure if this is OT for this list...

In isolating an analog (PLL, VCO, Amps, etc.) section from an otherwise
high-speed digital board I've encountered recommendations to build the usual
PI filter using an inductor (about 10uH) in one case and a ferrite bead (100
to 300ohm) in the other.

What are the merits of each approach?

Thanks,


===============================
 Martin Euredjian
  eCinema Systems, Inc.
===============================



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