Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1996-04-05
1998-03-10
Huber, Paul W.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 50, G11B 1722
Patent
active
057269580
ABSTRACT:
A method for controlling the gain of a spindle motor in a CD-ROM drive, includes the steps of: calculating a first number of tracks on a disc from a starting point of a program region to a reproduction position of data to be reproduced according to information received from a main controller; calculating a first rotational speed of the spindle motor corresponding to the reproduction position; reading a predetermined code to obtain information representative of a current position of a pickup; calculating a second number of tracks on the disc from the starting point of the program region to the current position of the pickup; calculating a second rotational speed of the spindle motor corresponding to the current position of the pickup; and driving a sled motor to move the pickup to the reproduction position and controlling the spindle motor based on a first quantity defining a difference between the first number of tracks and the second number of tracks, and further based on a second quantity defining a difference between the first rotational speed and the second rotational speed.
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Bushnell Esq. Robert E.
Huber Paul W.
Samsung Electronics Co,. Ltd.
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