Disk recording/reporduction device and a method of operation...

Details Disk recording/reporduction device and a method of operation... Disk recording/reporduction device and a method of operation...

G - Physics

11

B

G11B 21/02 (2006.01) G11B 21/10 (2006.01)

Patent

CA 2091592

ABSTRACT OF THE DISCLOSURE The behavior of a linear motor with respect to disturbance vibration is reduced by detecting the moving speed of an optical head 1 (or a linear motor 2 moving the optical head 1) with a velocity sensor 11, amplifying the output thereof with an amplifier 13, and applying a negative feedback (velocity feedback) to the linear motor 2 via a driver 6. Because the gain of the tracking servo loop including the linear motor 2 is reduced by this velocity feedback, this gain reduction is compensated for by a phase lag compensating circuit 12 to improve anti- vibration performance. -36-

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