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Re: parallel capacitors



At 10:12 AM 12/2/99 +0800, Jayasanker_J wrote:

Sometimes we use a big and small capacitors in parallel
for filtering purpose, for example in power supplies a 10uF and 0,1uF.
In theory, 10 and 10.1uF looks an insignificant difference.
Perhaps the small caps work better at high frequencies?

Yes. Take a look at the mfgr's spec sheets.

There's also issues these days about *where* the capacitors go. The
circuit board looks more like an RLCRLC...RLC lumped-circuit approximation
to a transmission line than a simple RLC circuit.