发明名称 |
Optical disc drive and optical disc controller |
摘要 |
An optical disc drive includes: an optical head with an actuator and a photodetector; a tracking driver outputting a drive signal to the actuator; a first tracking error signal generator for generating a first tracking error signal based on an output signal of the photodetector; first and second lens position control sections for respectively outputting first and second lens position control signals to the tracking driver; and a selector for selectively supplying the first tracking error signal to the first or second lens position control section according to a moving velocity of the optical head during a seek operation. The first lens position control signal is obtained by extracting signal components, of which the frequencies are equal to or lower than a predetermined frequency, from the first tracking error signal. The second lens position control signal is obtained by extracting DC components of the first tracking error signal at on-track points thereof.
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申请公布号 |
US6925037(B2) |
申请公布日期 |
2005.08.02 |
申请号 |
US20030386612 |
申请日期 |
2003.03.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KISHIMOTO TAKASHI;YAMAMOTO TAKEHARU;KANDA YOSHIHIRO;KIKUCHI JUN |
分类号 |
G11B7/085;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/085 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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