Modulators – Pulse or interrupted continuous wave modulator – Pulse width modulator
Reexamination Certificate
2008-10-29
2010-06-22
Mis, David (Department: 2817)
Modulators
Pulse or interrupted continuous wave modulator
Pulse width modulator
C318S445000, C318S599000
Reexamination Certificate
active
07741927
ABSTRACT:
The PWM control circuit is provided. The PWM control circuit includes: a PWM control signal generator that generates a PWM period signal defining a period of a PWM signal and a PWM resolution signal specifying a resolution in one period of the PWM period signal; and a PWM unit that generates the PWM signal based on the PWM period signal and the PWM resolution signal, wherein the PWM control signal generator changes a frequency of the PWM resolution signal while keeping a frequency of the PWM period signal unchanged.
REFERENCES:
patent: 4998257 (1991-03-01), On et al.
patent: 5185584 (1993-02-01), Takeuchi
patent: 2004-364366 (2004-12-01), None
Harness & Dickey & Pierce P.L.C.
Mis David
Seiko Epson Corporation
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