Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1984-04-05
1987-06-30
Cardillo, Raymond F.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 33, 369 41, 369 44, 369 46, G11B 7013, G11B 709, G11B 2108
Patent
active
046776028
ABSTRACT:
A device for controlling recording track jump operations includes a tracking servo loop which is activated when a data detecting point is traversed from an initial recording track on a recording disk to a target recording track. Circuitry is provided for accurate compensation in the event of overshooting the target recording track. A jump signal generating circuit may also be provided to reduce the frequency of generated traverse signals from a first frequency level to a second, lower frequency level when the data detecting point is a selected number of recording tracks away from the target recording track, or to gradually reduce the speed which the data detecting point traverses the recording tracks as the data detecting point moves from the initial recording track to the target recording track.
REFERENCES:
patent: 4138663 (1979-02-01), Lehureau et al.
SMPTE Journal, Feb. 1977, vol. 86, pp. 80-83, Mathieu, "A Random Access System . . . ".
Akiyama Tetsuo
Okano Takashi
Cardillo Raymond F.
Nguyen Hoa T.
Pioneer Electronic Corporation
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