Timing recovery for optical disc drive high frequency...

Details Timing recovery for optical disc drive high frequency... Timing recovery for optical disc drive high frequency...

2008-12-09

2011-11-01

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S053340

Reexamination Certificate

active

08050157

ABSTRACT:
A method and apparatus for recovering clock timing from a bi-phase modulated portion of a high frequency modulation (HFM) signal. The HFM signal includes signal transitions between a high level and a low level. A clock count is initiated upon detection of a first signal transition in the bi-phase modulated portion of the HFM signal. The clock count corresponds to an expected clock timing of the HFM signal. The clock count is stopped upon detection of a second signal transition in the bi-phase modulated portion of the HFM signal subsequent to the first signal transition. An actual clock count includes a number of clock cycles occurring between the first and second signal transitions based on the expected clock timing. An expected clock count between signal transitions of the bi-phase modulated portion of the HFM signal is identified if the actual clock count between the first and second signal transitions falls within a range of clock counts. The range of clock counts includes the expected clock count and a subset of clock count deviations from the first expected clock count. An error between the actual clock count and the first expected clock count is determined.

REFERENCES:
patent: 4466089 (1984-08-01), Wachi
patent: 4628497 (1986-12-01), Bierhoff
patent: 4734900 (1988-03-01), Davie
patent: 4740940 (1988-04-01), Tanaka et al.
patent: 4864553 (1989-09-01), Sakakibara et al.
patent: RE33665 (1991-08-01), Ogawa
patent: 5475664 (1995-12-01), Shimizume et al.
patent: 2005/0232105 (2005-10-01), Konagai et al.
patent: 2006/0109756 (2006-05-01), Chen et al.
patent: 2006/0250915 (2006-11-01), Park
patent: 2006/0250918 (2006-11-01), Hsu et al.
patent: 2008/0101176 (2008-05-01), Mouri et al.
patent: WO 2004/017311 (2004-02-01), None
patent: WO 2004/066285 (2004-08-01), None
patent: WO 2004/107342 (2004-12-01), None

Affiliated with

Also associated with

Rating

Timing recovery for optical disc drive high frequency... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Timing recovery for optical disc drive high frequency..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing recovery for optical disc drive high frequency... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4270427