Negative feedback amplifier/Definition

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https://en.citizendium.org/wiki/index.php?title=Negative_feedback_amplifier/Definition&printable=yes
A definition or brief description of Negative feedback amplifier.

An amplifier in which a fraction of its output is combined with the signal at its input that opposes the signal in what is called negative feedback in order to improve performance and to reduce sensitivity to parameter variations introduced by manufacturing or environmental uncertainties.

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