System and method for increasing effective pulse-width...

Details System and method for increasing effective pulse-width... System and method for increasing effective pulse-width...

2005-11-15

2005-11-15

Nguyen, Lihn My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C375S238000

Reexamination Certificate

active

06965260

ABSTRACT:
A system for, and method of, increasing effective pulse-width modulated (PWM) drive signal resolution and a power converter incorporating the system or the method. In one embodiment, the system includes: (1) a duty cycle calculator configured to calculate a theoretical duty cycle for a PWM drive signal to be provided to an associated power converter based on at least one operating condition thereof, the theoretical duty cycle not a member of a pre-established set of allowable duty cycles and (2) a duty cycle approximator coupled to the duty cycle calculator and configured to generate a sequence of members of the set of allowable duty cycles, wherein the sequence at least approximately averages to the theoretical duty cycle.

REFERENCES:
patent: 5945857 (1999-08-01), Havens
patent: 6665338 (2003-12-01), Midya et al.

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