Disk rotation control device
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United States of America Patent
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-
Jul 10, 2001
Grant Date -
N/A
app pub date -
Dec 14, 1998
filing date -
Feb 10, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
When a detected value of the signal processing speed from a frequency comparator is larger than a prescribed value input from an input terminal, the rotation control of a disk is switched from constant linear velocity control to constant angular velocity control using an error signal from an arithmetic unit. Alternatively, when a detected value of the rotational velocity from a frequency comparator is larger than a prescribed value input form an input terminal, the rotation control of the disk is switched from the constant angular velocity control into the constant linear velocity control.
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