Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2011-05-17
2011-05-17
Corrielus, Jean B (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C360S039000, C708S446000
Reexamination Certificate
active
07945009
ABSTRACT:
A specialized structure measures clock-to-data jitter in an optical memory interface by averaging the result of two second-order estimates of zero crossing using measured signal values on either side of the zero crossing. In one embodiment, a first estimate uses two sample points before the zero crossing and one sample point after while the second estimate uses one sample point before the zero crossing and sample two points after. An existing clock associated with an internal analog-to-digital converter is used to evenly space the samples in time. To simplify the second-order estimate calculations, the three samples of the exemplary embodiment are give x values of −1, 0, and +1 respectively. Which of the two roots of the second-order estimates is used is based on the slope of the signal at the zero crossing.
REFERENCES:
patent: 5293369 (1994-03-01), Melas et al.
patent: 6587528 (2003-07-01), Wynn
patent: 6598004 (2003-07-01), Ishida et al.
patent: 6640193 (2003-10-01), Kuyel
patent: 7423948 (2008-09-01), Kawabe et al.
patent: 7561650 (2009-07-01), Ryue et al.
patent: 7668053 (2010-02-01), Haddad
patent: 2005/0185708 (2005-08-01), Yamaguchi et al.
Blu-ray Disc, “White Paper Blu-ray Disc Format: 1.A Physical Format Specifications for BD-RE,” 2nd Edition, Blu-ray Disc Association, Feb. 2006.
“Data Interchange on 120 mm and 80 mm Optical Disk Using +RW Format—Capacity: 4,7 and 1,46 Gbytes per Side (Recording speed up to 4X,” Standard ECMA—337, 3rd Edition, Dec. 2005.
“80 mm (1,46 Gbytes per side) and 120 mm (4,70 Gbytes per side) DVD Re-recordable Disk (DVD-RW),” Standard ECMA—330, Dec. 2002.
Liu Jingfeng
Song Hongwei
Corrielus Jean B
Marvell International Ltd.
LandOfFree
Jitter measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Jitter measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jitter measurement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2625710