Tracking gain control method and tracking control circuit

Details Tracking gain control method and tracking control circuit Tracking gain control method and tracking control circuit

2008-04-01

2008-04-01

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07352665

ABSTRACT:
A tracking signal circuit in an optical disc playback apparatus for performing tracking servo control in accordance with a tracking error signal generated from a first signal that is input from a first photodetector circuit and a second signal that is input from a second photodetector circuit comprises a tracking signal amplifier circuit that has variable gain and a gain control circuit for controlling the gain of the tracking signal amplifier circuit. The tracking gain control circuit comprises a peak hold circuit for performing a peak hold operation on the amplitude of the tracking error signal in a state where tracking servo control is not performed and an amplitude comparator circuit for comparing the amplitude that was held by the peak hold operation with a predetermined reference amplitude, and controls the gain in accordance with the amplitude comparison result. As a result, the tracking gain can be appropriately set for optical discs with each having a different reflectivity.

REFERENCES:
patent: 5610887 (1997-03-01), Arai et al.
patent: 7158453 (2007-01-01), Sameshima
patent: 0 654 785 (1995-05-01), None
patent: 7-147023 (1995-06-01), None
English Patent Abstract of 7-147023 from esp@cenet 1995.

Affiliated with

Also associated with

Rating

Tracking gain control method and tracking control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tracking gain control method and tracking control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking gain control method and tracking control circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2758031