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Parasitic oscillation
Parasitic oscillation
is an undesirable
electronic oscillation
(cyclic variation in output voltage or current) in an electronic or digital device. It is often caused by
feedback
in an amplifying device. The problem occurs notably in
RF
,
audio
, and other
electronic amplifiers
as well as in
digital signal processing
. It is one of the fundamental issues addressed by
control theory
.
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