PWM digital amplifier with high-order loop filter
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United States of America Patent
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Mar 18, 2008
Grant Date -
Jul 20, 2006
app pub date -
Mar 7, 2006
filing date -
Mar 26, 2004
priority date (Note) -
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Abstract
An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
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