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Feedback-Generated Phase Modulation in Audio Amplifiers

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It is shown that by the application of feedback, an arbitrary open-loop amplitude nonlinearity of an audio amplifier is converted into a corresponding closed-loop phase nonlinearity. In the standard case, the effect manifests itself by the amplitude of the audio signal phase-modulating the high frequency components of the signal.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=3790

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AES - Audio Engineering Society