Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2006-12-29

2009-02-24

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S147000, C327S156000

Reexamination Certificate

active

07495486

ABSTRACT:
A semiconductor memory device includes: a phase comparison unit for comparing a phase of a clock signal with a phase of a reference clock signal; a delay line for delaying the clock signal in response to the comparison result of the phase comparison unit to output the delayed clock signal as the reference clock signal; a first delay locking control unit for adjusting a delay amount of the delay line to generate a locking signal when a phase of an output signal output from the delay line is within a predetermined range; and a second delay locking control unit for adjusting a phase difference between the clock signal and the reference clock signal within a predetermined range in response to an activation of the locking signal so that the phase difference is corrected.

REFERENCES:
patent: 4590602 (1986-05-01), Wolaver
patent: 6038276 (2000-03-01), Dinh
patent: 6097227 (2000-08-01), Hayashi
patent: 6317161 (2001-11-01), Renner et al.
patent: 6437616 (2002-08-01), Antone et al.
patent: 6762633 (2004-07-01), Lee
patent: 6844761 (2005-01-01), Byun et al.
patent: 6912012 (2005-06-01), Renner et al.
patent: 6937664 (2005-08-01), Park et al.
patent: 6960949 (2005-11-01), Suzuki
patent: 6963234 (2005-11-01), Bidenbach
patent: 7015725 (2006-03-01), Yu et al.
patent: 7053683 (2006-05-01), Li
patent: 7084682 (2006-08-01), Jeon et al.
patent: 7167527 (2007-01-01), Park et al.
patent: 7221202 (2007-05-01), Yayla
patent: 7239188 (2007-07-01), Xu et al.
patent: 7336112 (2008-02-01), Sha et al.
patent: 7358784 (2008-04-01), Kim et al.
patent: 2003/0122598 (2003-07-01), Kim et al.
patent: 2004/0170245 (2004-09-01), Hairapetian et al.
patent: 2005/0093598 (2005-05-01), Jeon et al.
patent: 10-2004-0083342 (2004-10-01), None
patent: 10-2004-0098899 (2004-11-01), None
patent: 10-2004-0102282 (2004-12-01), None
patent: 10-2004-0103035 (2004-12-01), None
patent: 10-2005-0001152 (2005-01-01), None
patent: 10-2005-0067544 (2005-07-01), None
Korean Office Action, issued in Korean Patent Application No. KR 10-2006-0096352, dated on Feb. 1, 2008.

Affiliated with

Also associated with

Rating

Semiconductor memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor memory device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4087088