AUDIO AMPLIFYING DEVICE
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United States of America Patent
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Issued Date -
Jun 16, 2016
app pub date -
May 14, 2015
filing date -
Dec 11, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An audio amplifying device including a first differential amplifier, a first buffer and a common-mode feedback circuit is provided. The first differential amplifier generates a differential output signal according to a differential input signal, wherein the differential output signal includes a first output signal and a second output signal. The first buffer generates an audio signal according to the first output signal. The common-mode feedback circuit, the first buffer and the first differential amplifier form a feedback loop, and the audio amplifying device controls a bias state of the first differential amplifier through the feedback loop so as to adjust a DC level of the audio signal to a clamping voltage.
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