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Electronic filter
Electronic filters
are circuits which perform
signal processing
functions, specifically to remove unwanted frequency components from the signal, to enhance wanted ones, or both. Electronic
filters
can be:
passive
or
active
analog
or
digital
high-pass
,
low-pass
,
band-pass
,
band-stop
(band-rejection; notch), or
all-pass
.
discrete-time
(sampled) or
continuous-time
linear
or
non-linear
infinite impulse response
(IIR type) or
finite impulse response
(FIR type)
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