Pickup control device and method for fast or slow reproduction in a disk reading system
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United States of America Patent
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Jan 15, 1985
Grant Date -
N/A
app pub date -
Jul 23, 1981
filing date -
Aug 4, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pickup control device for a data reading device in which, for fast or slow reproduction modes, a slider motor is forcibly driven to change the relative position of the pickup and the disk in a radial direction of the disk after which the pickup is set to a normal or center position thereof. A slider motor for changing the relative position of the pickup and the disk is driven in response to a fast or slow reproduction instruction and a position signal representative of the position of the pickup is produced with which a tracking servo loop is opened for a predetermined period of time during which the pickup is returned to its normal position. With this construction, the pickup is prevented from returning to a first track from a second track to which it has jumped through a scratch or the like.
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