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Dynamic suppression of pop and click noise in an audio driver
Dynamic suppression of pop and click noise in an audio driver
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机译：动态抑制流行音乐，在音频驱动程序中单击噪声
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摘要
An output driver for an audio system includes a pre-charge circuit. The pre-charge circuit includes a charging amplifier and a feedback bias circuit. A charging amplifier includes an output node for coupling to a capacitive load, a first input node for receiving a reference voltage, a second input node for coupling to the output node of the charging amplifier, and a bias node for receiving a bias current. An output current of the charging amplifier varies with the bias current. The feedback bias circuit is coupled to the output node to sense an output voltage of the charging amplifier, and configured to provide the bias current that varies with the output voltage of the charging amplifier.
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