发明名称 |
TRACKING SYSTEM AND METHOD |
摘要 |
Tracking system for guiding an optical beam on tracks on an optical disc, said tracking system comprising a photodetector (A1, A2) for detecting optical beams derived from said optical beam, said photodetector generating a first output signal (A) and a second output signal (B), said tracking system comprising first processing means for generating a first differential signal (PP(DC)) corresponding to the low-frequency part of a difference between said first and second output signals. The tracking system comprises second processing means for generating a tracking error signal (PP(AC/DC)) defined by the addition of said first differential signal (PP(DC)) to a second differential signal (PP'(AC)), said second differential signal corresponding to a fraction of the difference in amplitude of the high-frequency components of said first and second output signals. Use: Optical disc player/writer. |
申请公布号 |
WO2004019332(A1) |
申请公布日期 |
2004.03.04 |
申请号 |
WO2003IB03363 |
申请日期 |
2003.08.05 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;STALLINGA, SJOERD;KUIJPER, MAARTEN;STEK, AALBERT |
发明人 |
STALLINGA, SJOERD;KUIJPER, MAARTEN;STEK, AALBERT |
分类号 |
G11B7/085;G11B7/09;G11B7/095 |
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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