DLL circuit having duty cycle correction and method of...

Details DLL circuit having duty cycle correction and method of... DLL circuit having duty cycle correction and method of...

2008-12-29

2010-10-26

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S149000, C327S156000

Reexamination Certificate

active

07821310

ABSTRACT:
A delay locked loop (DLL) circuit includes a duty cycle correcting unit configured to correct a duty cycle of a reference clock signal in response to a duty cycle correction signal and generate a correction clock signal. A feedback loop of the DLL circuit performs a delay lock operation on the correction clock signal and generates an output clock signal. A first duty cycle detecting unit detects a duty cycle of the correction clock signal and generates a first detection signal and a second duty cycle detecting unit detects a duty cycle of the output clock signal and generates a second detection signal. Finally, a duty cycle control unit generates the duty cycle correction signal in response to the first detection signal and the second detection signal to perform the duty cycle correction.

REFERENCES:
patent: 6765976 (2004-07-01), Oh
patent: 6967514 (2005-11-01), Kizer et al.
patent: 7184509 (2007-02-01), Cho et al.
patent: 7521974 (2009-04-01), Kirschenmann
patent: 7598783 (2009-10-01), Shin et al.
patent: 7633324 (2009-12-01), Yun et al.
patent: 2007/0279109 (2007-12-01), Kirschenmann
patent: 2008/0100356 (2008-05-01), Lee
patent: 2008/0191767 (2008-08-01), Koo
patent: 2008/0278206 (2008-11-01), Kim et al.
patent: 2009/0295446 (2009-12-01), Yun et al.
patent: 1020070016737 (2007-02-01), None
patent: 1020080069756 (2008-07-01), None

Affiliated with

Also associated with

Rating

DLL circuit having duty cycle correction and method of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with DLL circuit having duty cycle correction and method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DLL circuit having duty cycle correction and method of... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4226399