Spread-spectrum clock generator

Details Spread-spectrum clock generator Spread-spectrum clock generator

2006-08-29

2006-08-29

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S145000, C327S113000

Reexamination Certificate

active

07098709

ABSTRACT:
This invention provides a clock generator which is capable of improving modulation accuracy without accompanying an increase in consumption current by steady current when spectrum spread of a clock signal is executed. The phase balanced voltage Vf to be inputted to the voltage control oscillator (VCO)9is modulated within a dead band region in which no difference signals Pr, Pr are outputted from the charge pump circuit7when a difference in oscillation frequency between an output clock signal fo and a reference clock signal fr is detected. Consequently, the output clock signal fo is changed within the range of a lock frequency in a PLL circuit, so as to execute the spectrum spread of the output clock signal fo while maintaining the lock state of the oscillation frequency in the PLL circuit.

REFERENCES:
patent: 5534823 (1996-07-01), Kondou
patent: 5610955 (1997-03-01), Bland
patent: 5631920 (1997-05-01), Hardin
patent: 5651035 (1997-07-01), Tozun et al.
patent: 5659587 (1997-08-01), Knierim
patent: 6294936 (2001-09-01), Clementi
patent: 6501307 (2002-12-01), Yen
patent: 6798302 (2004-09-01), Starr et al.
patent: 2000-101424 (2000-04-01), None

Affiliated with

Also associated with

Rating

Spread-spectrum clock generator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spread-spectrum clock generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread-spectrum clock generator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3715571