Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2006-11-28
2006-11-28
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S175000
Reexamination Certificate
active
07142026
ABSTRACT:
A delay locked loop (DLL) capable of correcting a duty ratio including: a clock buffer for receiving an external clock signal and an inverted external clock signal to generate a rising edge clock signal; a delay unit for delaying the rising edge clock signal based on a first comparison signal in order to generate a first internal clock signal, a second internal clock signal, a first delay locking signal and a second delay locking signal; a duty correction unit for receiving the first and the second internal clock signals and the first and the second delay locking signals to generate a mixed clock signal; a delay model unit for delaying the mixed clock signal to generate a feed-backed clock signal; and a first phase detector for receiving the external clock signal and the feed-backed clock signal to generate the first comparison signal.
REFERENCES:
patent: 5614855 (1997-03-01), Lee et al.
patent: 5945862 (1999-08-01), Donnelly et al.
patent: 6342801 (2002-01-01), Shin
patent: 6384652 (2002-05-01), Shu
patent: 6452432 (2002-09-01), Kim
patent: 6466071 (2002-10-01), Kim et al.
patent: 6518809 (2003-02-01), Kotra
patent: 6639441 (2003-10-01), Ono et al.
patent: 6677792 (2004-01-01), Kwak
patent: 6680635 (2004-01-01), Lee
patent: 6765421 (2004-07-01), Brox et al.
patent: 6803826 (2004-10-01), Gomm et al.
patent: 6853225 (2005-02-01), Lee
patent: 6956418 (2005-10-01), Kwak et al.
patent: 7046059 (2006-05-01), Kwak
patent: 2004/0062121 (2004-04-01), Chung et al.
patent: 2004/0066873 (2004-04-01), Cho et al.
Blakely & Sokoloff, Taylor & Zafman
Nguyen Hai L.
LandOfFree
Delay locked loop and its control method for correcting a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Delay locked loop and its control method for correcting a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delay locked loop and its control method for correcting a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3677981