Power amplification circuits

Details Power amplification circuits Power amplification circuits

2006-11-28

2006-11-28

Pascal, Robert (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

Reexamination Certificate

active

07142051

ABSTRACT:
A power amplification circuit includes a PWM signal generating portion operable to produce from an input signal first and second PWM signals having complementary variations in their respective pulse widths, a first delaying portion operable to delay the first PWM signal by a first time to produce a first delayed PWM signal, a first switching amplifier operable to perform a switching operation in response to the first delayed PWM signal to subject the first delayed PWM signal to power amplification to produce a first output signal, and to supply the first output signal to a circuit load, a second delaying portion operable to delay the second PWM signal by a second time different from the first time to produce a second delayed PWM signal, and a second switching amplifier operable to perform a switching operation in response to the second delayed PWM signal to subject the second delayed PWM signal to power amplification to produce a second output signal, and to supply the second output signal to the circuit load.

REFERENCES:
patent: 4415862 (1983-11-01), Kunugi
patent: 6064259 (2000-05-01), Takita
patent: 6294954 (2001-09-01), Melanson
patent: 6373336 (2002-04-01), Anderskouv et al.
patent: 6429737 (2002-08-01), O'Brien
patent: 2003/0006838 (2003-01-01), Yeongha et al.
patent: 2002-158544 (2002-05-01), None

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