Track jump control circuit for accessing optical disk drive

Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium

Reexamination Certificate

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Reexamination Certificate

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10669809

ABSTRACT:
In track jumping operation, an acceleration/deceleration pulse generation portion measures the TE signal amplitude during track jumping, and modifies the acceleration/deceleration time of the acceleration/deceleration pulse according to the measured amplitude to drive a tracking actuator. Also, the acceleration/deceleration pulse generation portion measures the movement time from the start of acceleration until a certain location is reached, and modifies the peak value of the deceleration pulse according to the measured time to drive the tracking actuator.

REFERENCES:
patent: 4932013 (1990-06-01), Kojima et al.
patent: 5101386 (1992-03-01), Kojima et al.
patent: 5195067 (1993-03-01), Yanagi
patent: 5195069 (1993-03-01), Nakano
patent: 5307333 (1994-04-01), Ikeda et al.
patent: 6181651 (2001-01-01), Kishimoto et al.
patent: 6628580 (2003-09-01), Kishimoto et al.
patent: 6721239 (2004-04-01), Kishimoto et al.
patent: 5-234103 (1993-09-01), None
patent: 2000-353324 (2000-12-01), None
Optical Recording and Reproducing Device, (JP, 2000-353,324), Kishimoto et al, Dec. 19, 2000, abstract only.

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