Circuit and method for switching PFM and PWM

Details Circuit and method for switching PFM and PWM Circuit and method for switching PFM and PWM

2007-06-06

2008-11-04

Tran, Anh Q (Department: 2819)

Modulators

Pulse or interrupted continuous wave modulator

Pulse position, frequency, phase, or spacing modulator

C332S108000, C332S109000

Reexamination Certificate

active

07446621

ABSTRACT:
The switching method between pulse frequency modulation and pulse width modulation signals is first based on an output voltage of a power transistor to generate a corresponding pulse frequency modulation signal. Next, it is determined whether the corresponding pulse frequency modulation signal has reached its maximal frequency. If so, the initial pulse width modulation signal is adjusted to have the same width as the pulse frequency modulation signal. Thereafter, the adjusted pulse width modulation signal is outputted.

REFERENCES:
patent: 7408333 (2008-08-01), Chen et al.
patent: 2006/0273772 (2006-12-01), Groom
patent: 2008/0022139 (2008-01-01), Lin et al.
U.S. Appl. No. 11/725,440, filed Mar. 20, 2007 in the name of Chen et al.

Affiliated with

Also associated with

Rating

Circuit and method for switching PFM and PWM does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit and method for switching PFM and PWM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit and method for switching PFM and PWM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4049353