Method for setting the loop gain of servo loops in a disc player

Details Method for setting the loop gain of servo loops in a disc player Method for setting the loop gain of servo loops in a disc player

1989-11-08

1992-01-28

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, G11B 700

Patent

active

050848496

ABSTRACT:
A loop gain setting method automatically sets the loop gain of a focus servo loop and a tracking servo loop of a disc player for playing a disc. Firstly the loop gains of the focus servo loop and the tracking servo loop are set, and subsequently the appropriateness of the set values of loop gains is judged by comparing the set values of the loop gains with each other. According to another aspect of the present invention the loop gains of the focus servo loop and the tracking servo loop are set, and subsequently the appropriateness of the set values of loop gains is judged by comparing at least one of the set values of the loop gains with a sensed value of the amplitude of the envelope of an RF signal read-out from the disc.

REFERENCES:
patent: 4707648 (1987-11-01), Minami
patent: 4787076 (1988-11-01), Deguchi et al.
patent: 5003521 (1991-03-01), Yoshida et al.

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