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There are three types of filters: capacitor, inductor, and Pi.
The capacitor reduces transients by
temporarily storing some electrical
energy in the electrostatic field
(electrical capacitance caused by
voltage differences between two
plates with the dielectric material
in between) and gradually releasing
them over time.
The inductor reduces transients by
temporarily storing some electrical
energy in the magnetic field (electrical
induction caused by electric
currents) and gradually releasing them
over time.
The Pi filter reduces transients by a
specially designed RLC circuit, which
combines both capacitors and inductors
utilizing transient-reducing characteristics
of both types of filters.
While any of the three types of filters will do
the job, the Pi type is the optimal choice, combining advantages of
both capacitor and inductor types of filters.
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