Optical disc drive and optical disc controller

Details Optical disc drive and optical disc controller Optical disc drive and optical disc controller

2005-08-02

2005-08-02

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044280

Reexamination Certificate

active

06925037

ABSTRACT:
An optical disc drive includes: an optical head with an actuator and a photodetector; a tracking driver outputting a drive signal to the actuator; a first tracking error signal generator for generating a first tracking error signal based on an output signal of the photodetector; first and second lens position control sections for respectively outputting first and second lens position control signals to the tracking driver; and a selector for selectively supplying the first tracking error signal to the first or second lens position control section according to a moving velocity of the optical head during a seek operation. The first lens position control signal is obtained by extracting signal components, of which the frequencies are equal to or lower than a predetermined frequency, from the first tracking error signal. The second lens position control signal is obtained by extracting DC components of the first tracking error signal at on-track points thereof.

REFERENCES:
patent: 5270987 (1993-12-01), Kaku et al.
patent: 5442604 (1995-08-01), Osada
patent: 09-274726 (1997-10-01), None

Affiliated with

Also associated with

Rating

Optical disc drive and optical disc controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3445730