Amplifying an audio signal
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United States of America Patent
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Nov 13, 2012
Grant Date -
Jan 10, 2008
app pub date -
Aug 23, 2006
filing date -
Jul 8, 2006
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Abstract
A method of amplifying an output signal from a microphone or audio transducer so as to introduce a controllable degree of distortion for inputs having a wide dynamic range, comprising the steps of: receiving a differential input signal from a microphone or audio transducer, applying said differential signal to a differential amplifier, said differential amplifier having a negative feedback path to control the gain of said amplifier; and providing non-linear circuitry in said feedback path so as to introduce distortion, such that the degree of distortion present is related to the level of the output signal and not to the level of the input signal.
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