Disc player using a servo loop with a variable transfer function

Details Disc player using a servo loop with a variable transfer function Disc player using a servo loop with a variable transfer function

1989-10-05

1993-09-14

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4436, 369 54, 369 58, G11B 7095

Patent

active

052455998

ABSTRACT:
A disc playing apparatus having a tracking servo loop and a focus servo loop is configured such that a transfer function of at least one of the servo loops is adjustable. Disc defect detection signals are generated in response to a change in a low frequency component and a high frequency component of a read signal output from the pickup, and the transfer function of at least one of the tracking servo loop and the focus servo loop is adjusted in response to the disc defect detection signals. According to another feature of the invention, the transfer function of at least one of the tracking servo loop and the focus servo loop is gradually changed each time an erroneous jumping movement of the information reading light spot is detected by information contained in the read signal output by the pickup.

REFERENCES:
patent: 4580255 (1986-04-01), Inoue et al.
patent: 4587644 (1986-05-01), Fujiie
patent: 4700334 (1987-10-01), Shinkai
patent: 4701603 (1987-10-01), Dakin et al.
patent: 4703468 (1987-10-01), Baba et al.
patent: 4722079 (1988-01-01), Matsumoto
patent: 4736354 (1988-04-01), Yoshio
patent: 5023854 (1991-06-01), Satoh et al.
patent: 5025434 (1991-06-01), Tateishi et al.

Affiliated with

Also associated with

Rating

Disc player using a servo loop with a variable transfer function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disc player using a servo loop with a variable transfer function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disc player using a servo loop with a variable transfer function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2033473