Apparatus and method for controlling a tracking balance of an op

Details Apparatus and method for controlling a tracking balance of an op Apparatus and method for controlling a tracking balance of an op

1997-09-30

1999-11-23

Hindi, Nabil

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4435, G11B 700

Patent

active

059912480

ABSTRACT:
The apparatus for controlling the tracking balance of the optical disk player generates a tracking balance control signal removing a DC component from a tracking error caused by installing positions of a disk, a photo diode, a laser diode, and an object lens. A feed-back signal which is generated in a control part controls the tracking balance control signal. The control part measures a duration time of logic high from a logic error signal obtained from the tracking error signal and counts the number of the logic high which is in the predetermined time duration. When the counted value is equal to or smaller than a predetermined number, the feed-back signal for correcting the tracking balance is generated.

REFERENCES:
patent: 4817069 (1989-03-01), Shigemori
patent: 4899325 (1990-02-01), Kasuhara et al.
patent: 5710720 (1998-01-01), Algrain et al.

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