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Patent Searching and Data


Title:
TRACK JUMP CONTROL CIRCUIT AND OPTICAL DISK REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JP2000163763
Kind Code:
A
Abstract:

To suppress or stop the speed of a pickup and to more accurately control the moving speed by driving a second driving device by the opposite phase of the vibration of the pickup based on the output of a detection circuit for detecting the vibration of the pickup when a thread is moved.

Off track signals OT outputted by a signal processing circuit 7 based on the output of the pickup 3 are inputted to a vibration detection circuit 10 as well. An opposite phase calculation circuit 12 is a delay circuit for performing output for which the phase is shifted from input signals for 180° or an inversion circuit for inverting the polarity of the input signals and the vibration detection circuit 10 detects the vibration of the pickup 3 accompanying the movement of the thread 4 and outputs the signals of the opposite phase of a detected result to a control circuit 8. The control circuit 8 outputs a driving instruction TD2 to a second actuator 6 based on the output of the vibration detection circuit 10, supplies the driving force of the opposite phase of the vibration for canceling the detected vibration to the pickup 3 and suppresses or stops the vibration.


Inventors:
WATANABE KANEO
Application Number:
JP34049598A
Publication Date:
June 16, 2000
Filing Date:
November 30, 1998
Export Citation:
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Assignee:
SANYO ELECTRIC CO
International Classes:
G11B7/085; G11B7/09; (IPC1-7): G11B7/085; G11B7/09
Attorney, Agent or Firm:
Masano Shibano