Title:
駆動信号生成回路
Document Type and Number:
Japanese Patent JP4806393
Kind Code:
B2
Abstract:
A drive signal generation circuit comprising: a tracking signal output circuit to output a tracking signal based on an error signal indicating a track deviation of laser light output from the optical pickup relative to a track, the tracking signal being a signal for driving a motor to move an optical pickup in a radial direction of an optical disc to reduce the track deviation of the laser light; a stop signal output circuit to output a stop signal for driving the motor to stop moving the optical pickup in the radial direction; and a switch circuit to output the tracking signal as a drive signal for driving the motor when a level of an output signal from the optical pickup is higher than a predetermined level, and to output the stop signal as the drive signal when the level of the output signal is lower than the predetermined level.
Inventors:
Yoshiomi Zaibu
Application Number:
JP2007323507A
Publication Date:
November 02, 2011
Filing Date:
December 14, 2007
Export Citation:
Assignee:
ON Semiconductor Trading Limited
International Classes:
G11B7/09
Domestic Patent References:
| JP5144019A | ||||
| JP2000285487A | ||||
| JP7045023A |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation