Occurs when some or all of the output of the device (such as an amplifier) is taken back to the input. This may be accidental (such as the acoustic feedback from a speaker to microphone) or intentional, to reduce distortion, as used in a closed-loop control process.

In a closed loop system this could be information such as: speed, torque, position, angular position.

See also: Acoustic Feedback, Negative Feedback.

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Subjects: Electronics