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Digital audio amplifier, an audio system including the same, and a method of amplifying an audio signal
Digital audio amplifier, an audio system including the same, and a method of amplifying an audio signal
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机译:数字音频放大器,包括该数字音频放大器的音频系统以及放大音频信号的方法
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摘要
A digital audio amplifier, an audio system including the same and a method of amplifying an audio signal that can reduce switching noise interference generated in a pulse width modulator are provided. The digital audio amplifier includes a selection circuit, a digital signal processor and a pulse width modulator. The selection circuit selects one of an audio data signal and a digitized broadcasting signal to output a digital input signal. The digital signal processor samples the digital input signal using one of a plurality of oversampling frequencies based on a local oscillator output signal and a separation signal to output a sampled digital signal. The pulse width modulator performs a pulse width modulation on the sampled digital signal.
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