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Thread: Filter Capacitors
www.piclist.com/techref/logic/dsps.htm?key=filter
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face BY : Mike Witherden email (remove spam text)



Hi,

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.

MikeW


>>> KILLspammarkpspam_OUTspamspamBeGoneCANNONTECH.COM 06/06/00 02:58PM >>>
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?

Mark P

<s93d1581.015@wpogate.mlsultan.ac.za>

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