Mike Witherden email (remove spam text)
Put simply: The large electrolytic capacitor acts as a short for low frequencies.
and the small disc or dipped capacitor acts as a short for high frequencies.
In other words the Impedance/Frequency characteristics of the two
types of caps are vastly different.
>>> CANNONTECH.COM 06/06/00 02:58PM >>> markp
In many products, I see a large electrolytic capacitor in parallel with a
small disc or dipped capacitor. Why is that done? Obviously, the pair
does not act as a single large capacitor, or aonly a single one would be
used. Just how does that arrangement work?
See also: www.piclist.com/techref/logic/dsps.htm?key=filter
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