Delay locked loop circuit for semiconductor memory apparatus

Details Delay locked loop circuit for semiconductor memory apparatus Delay locked loop circuit for semiconductor memory apparatus

2007-07-19

2009-06-16

Zweizig, Jeffrey S (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S156000, C327S293000

Reexamination Certificate

active

07548101

ABSTRACT:
A delay locked loop circuit for a semiconductor memory apparatus includes a duty cycle correcting part that corrects and outputs duty cycles of internal clocks. A clock pulse width detecting part detects a pulse width of an external clock and outputs a pulse width detecting signal. A driving part divides a phase of the output of the duty cycle correcting part, adjusts a pulse width of at least one of two signals, which are obtained by dividing the phase, in accordance with the pulse width detecting signal, and outputs the two signals as delay locked loop clocks.

REFERENCES:
patent: 5133064 (1992-07-01), Hotta et al.
patent: 6798248 (2004-09-01), Hazucha et al.
patent: 6813197 (2004-11-01), Park
patent: 6989700 (2006-01-01), Kim
patent: 7103133 (2006-09-01), Jung
patent: 7154311 (2006-12-01), Lim
patent: 7170313 (2007-01-01), Shin
patent: 2006/0267649 (2006-11-01), Park et al.
patent: 2005251370 (2005-09-01), None
patent: 1020040091975 (2004-11-01), None
patent: 1020040095965 (2004-11-01), None

Affiliated with

Also associated with

Rating

Delay locked loop circuit for semiconductor memory apparatus 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 circuit for semiconductor memory apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delay locked loop circuit for semiconductor memory apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4058072