Switching amplifier system and method for suppressing signal distortion thereof
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United States of America Patent
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May 6, 2014
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Jun 5, 2012
filing date -
Feb 17, 2012
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Abstract
The invention further provides a switching amplifier system. In one embodiment, the switching amplifier system comprises a noise shaper, a corrector, and a pulse width logic. The noise shaper receives a first signal, performs a noise shaping process to process the first signal according to a feedback signal to generate a second signal sliced into a plurality of frames. The corrector adds a plurality of correction pulses respectively to the frames of the second signal to obtain a third signal in such a way that the correction pulse added to the second signal in a target frame selected from the frames has a polarity inverse to that of an original waveform of the second signal in the target frame. The pulse width logic then converts the third signal to a pulse width modulation (PWM) signal.
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