Low distortion class-D amplifier
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United States of America Patent
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Dec 30, 2008
Grant Date -
Sep 27, 2007
app pub date -
Dec 20, 2006
filing date -
Mar 22, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A low distortion class-D amplifier. The amplifier comprises a power supply terminal for receiving power, an amplification stage, and an output stage. The amplification stage receives an input signal and generates a ramp signal. Further more, the amplification stage generates a pulse width modulation signal based on the ramp signal and a hysteretic signal. The output stage coupled to the power supply terminal receives the pulse width modulation signal and generates an output. Advantageously, the ramp signal and the hysteretic signal are positioned at a voltage level that is half the voltage level of said power supply and that varies proportionally with said power supply.
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