Low distortion class D amplifier using a controlled delay

Details Low distortion class D amplifier using a controlled delay Low distortion class D amplifier using a controlled delay

2007-01-02

2007-01-02

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S010000, C330S20700P

Reexamination Certificate

active

11065177

ABSTRACT:
An electronic class-D amplifier including a one servo-loop amplifier plus pulse width modulator, and a controlled delay stage including a delay modulation input, and a negative feedback path connects an output of the output switching stage to an input of the servo-loop amplifier wherein the forward gain of an output switching stage, the forward gain of the servo-loop amplifier plus pulse width modulator and controlled delay stage, and a carrier reference output signal's mean frequency, and modulation gain of the controlled delay stage, and the gain of the negative feedback path, are selected to lower the distortion of a signal at the amplifier output relative to a signal applied to the amplifier input.

REFERENCES:
patent: 6064259 (2000-05-01), Takita
patent: 7078963 (2006-07-01), Andersen et al.
patent: 2005/0151584 (2005-07-01), Sawashi

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