Track jump servo apparatus for disc reproducing system

Details Track jump servo apparatus for disc reproducing system Track jump servo apparatus for disc reproducing system

1995-09-25

1998-06-02

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 50, G11B 700

Patent

active

057611637

ABSTRACT:
A disc reproducing system having a pickup for reading data recorded on a disc that is rotated by a disc drive motor. The system, also has a clock signal generator for generating a clock signal that is phase-locked with the data read by a pickup, and a processor for processing the data read by the pickup based on the clock signal generated by the clock signal generating means. Further included in the system is a linear velocity signal generator for generating a linear velocity signal with a frequency that is related to the rotational speed of the disc, a servo controller for controlling the rotation speed of the disc drive motor so as to keep constant a relative speed between the pickup and the disc, and a pickup feed motor for moving the pickup in the radial direction of the disc. The apparatus is characterized by the fact that a capture range of the clock signal generator can be controlled to meet the clock signal with the data read by the pickup at a completion of the pickup feed operation.

REFERENCES:
patent: 4603412 (1986-07-01), Yamazaki
patent: 4672597 (1987-06-01), Yamazaki
patent: 4853914 (1989-08-01), Okano et al.
patent: 5036508 (1991-07-01), Okano
patent: 5535186 (1996-07-01), Niura et al.
patent: 5642342 (1997-06-01), Murata

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