Optical disc player with improved initial positioning operation

Details Optical disc player with improved initial positioning operation Optical disc player with improved initial positioning operation

1985-07-24

1987-09-29

Cardillo, Raymond F.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 33, 369 46, G11B 7085, G11B 7095, G11B 2108

Patent

active

046972560

ABSTRACT:
An optical disc player employs a counter preset with a preset value representative of 4 times the distance between an initial address position of an optical head block and a desired track address position. The counter decrements the absolute value of the preset value as the optical head block approaches the desired track. The counter value is converted into an analog signal and applied to a tracking driver which drives the optical head block toward the desired track. The absolute value is decremented by 4 each time the optical head is moved by one track spacing.

REFERENCES:
patent: 4138663 (1979-02-01), Lehureau et al.
patent: 4443869 (1984-04-01), Ammon
patent: 4484319 (1984-11-01), Koishi et al.
patent: 4541083 (1985-09-01), Maeda et al.

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