PWM control circuit and motor equipped with the same

Details PWM control circuit and motor equipped with the same PWM control circuit and motor equipped with the same

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

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