Low distortion switching amplifier circuits and methods

Details Low distortion switching amplifier circuits and methods Low distortion switching amplifier circuits and methods

2008-01-02

2009-08-25

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S010000, C330S20700P

Reexamination Certificate

active

07579910

ABSTRACT:
Embodiments of the present invention include switching amplifier circuits and methods. In one embodiment, the present invention includes an low distortion method of driving a switching amplifier comprising generating a first pulse width modulated signal on a first terminal, generating a second pulse width modulated signal on a second terminal, and delaying one of the first or second signals. In one embodiment, the modulated signals and delay result in pulse trains near zero crossings to reduce crossover distortion.

REFERENCES:
patent: 6693571 (2004-02-01), Melanson et al.
patent: 6762704 (2004-07-01), Melanson et al.
patent: 6917324 (2005-07-01), Lee
patent: 7262658 (2007-08-01), Ramaswamy et al.
patent: 7378904 (2008-05-01), Risbo
patent: 7482870 (2009-01-01), Maejima et al.
patent: 2006/0181346 (2006-08-01), Nguyen

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