Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1987-07-10
1988-11-15
McElheny, Jr., Donald
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
G11B 700, G11B 2110
Patent
active
047854421
ABSTRACT:
A light spot position control system of the invention uses an optical disc in which a servo area and a data area are alternately formed along a rotating direction of a rotary recording medium, wherein error signals obtained from the servo areas are sampled, the latest sample value is compared with at least one-preceding sample value, a check is made to see if the latest sample value is correct or incorrect, and when the latest sample value is decided to be incorrect, the preceding error signal held is directly used as a light spot position control signal without updating the current error signal holding value.
REFERENCES:
patent: 4321700 (1982-03-01), Russell
patent: 4408314 (1983-10-01), Yokota
patent: 4467462 (1984-08-01), Shibata
patent: 4504937 (1985-03-01), Yonezawa et al.
patent: 4544838 (1985-10-01), Musha et al.
patent: 4564929 (1986-01-01), Yonezawa et al.
patent: 4593386 (1986-06-01), Kuwabara et al.
patent: 4661942 (1987-04-01), Yoshimoto et al.
patent: 4682314 (1987-07-01), Nakagaki et al.
patent: 4707816 (1987-11-01), Yonezawa et al.
Abstract for the 45th Meeting of the Japan Society of Applied Physics, 13P-E-8 & 13P-E-9, (no translations).
Ohtake Masatoshi
Takasugi Wasao
Takeuchi Takashi
Tsuyoshi Toshiaki
Yonezawa Seiji
Hitachi , Ltd.
McElheny Jr. Donald
LandOfFree
Light spot position control system and method by sampling servo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light spot position control system and method by sampling servo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light spot position control system and method by sampling servo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1107593