Tilt servo device in optical disc player

Details Tilt servo device in optical disc player Tilt servo device in optical disc player

1989-05-19

1992-04-07

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4435, G11B 700

Patent

active

051034360

ABSTRACT:
Optical disk player with tilt servo including means wherein the transfer frequency characteristic of a feedback circuit for controlling a tilt adjust mechanism is changed to a wide bandwidth transfer characteristic while in a search operation mode, and is changed to a narrow bandwidth transfer characteristic while in a play operation mode. Accordingly, the transfer frequency characteristic of the feedback circuit in the tilt servo system is changed according to the operation mode of the disk player, so that a suitable loop characteristic is selected for the tilt servo system.

REFERENCES:
patent: 4607357 (1986-08-01), Okano
patent: 4608680 (1986-08-01), Yano
patent: 4637005 (1987-01-01), Naito et al.
patent: 4703468 (1987-10-01), Baba et al.
patent: 4707817 (1987-11-01), Yoshio
patent: 4736354 (1988-04-01), Yoshio
Japanese Utility Model App. No. 27231/1988.

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