发明名称 |
Magnetooptical disk focus and tracking servo for a magnetooptical disk servo device |
摘要 |
A magnetooptical disk focus servo and tracking servo which remain stable and which make various servo control gains uniform even when the amount of light detected in a photodetecting portion changes. An operator outputs a sum signal by adding signals corresponding to an amount of light detected in at least two photodiodes among a plurality of photodiodes of the photodetecting portion. A first divider divides a focus error signal by the sum signal. A second divider divides a tracking error signal by the sum signal. A focus servo portion controls a focus actuator using the output of the first divider, and a tracking servo portion for controlling a track actuator with the output of the second divider.
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申请公布号 |
US5894462(A) |
申请公布日期 |
1999.04.13 |
申请号 |
US19970791140 |
申请日期 |
1997.01.30 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
HWANGBO, MIN |
分类号 |
G11B11/10;G11B7/09;G11B11/105;(IPC1-7):G11B7/095 |
主分类号 |
G11B11/10 |
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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