Power amplification circuits

Details Power amplification circuits Power amplification circuits

2004-11-10

2008-10-21

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

Reexamination Certificate

active

07439786

ABSTRACT:
A power amplification circuit includes first and second clock signal generating portions operable to produce, respectively, first and second clock signals different in frequency from each other; first and second PWM signal generating portions operable to produce first and second PWM signals based on first and second input signals using the first and second clock signals, respectively; a first switching amplifier operable to perform a switching operation in response to the first PWM signal to subject the first PWM signal to power amplification to produce a first output signal and to supply the first output signal to a first circuit load; and a second switching amplifier operable to perform a switching operation in response to the second PWM signal to subject the second PWM signal to power amplification to produce a second output signal and to supply the second output signal to a second circuit load.

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patent: 4415862 (1983-11-01), Kunugi
patent: 6104248 (2000-08-01), Carver
patent: 6593806 (2003-07-01), Melanson
patent: 6788137 (2004-09-01), Morita
patent: 6812785 (2004-11-01), Masuda et al.
patent: 2001/0026174 (2001-10-01), Delano
patent: 2002/0075069 (2002-06-01), Karki et al.
patent: 2003/0087621 (2003-05-01), Roeckner et al.
patent: 2003/0112064 (2003-06-01), Masuda et al.
patent: 2003/0169103 (2003-09-01), Shima
patent: 2002-158544 (2002-05-01), None

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