发明授权
- 专利标题: Optical drive error tracking method and apparatus
- 专利标题(中): 光驱误差跟踪方法及装置
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申请号: US09169368申请日: 1998-10-09
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公开(公告)号: US06233210B1公开(公告)日: 2001-05-15
- 发明人: David L. Schell
- 申请人: David L. Schell
- 主分类号: G11B713
- IPC分类号: G11B713
摘要:
A method and apparatus provides an improved optical storage disk player. An improved method and apparatus for obtaining a tracking error signal for an optical disk player is disclosed which is general across the various data formats found in CD audio disks, CD-ROMs, and digital video disks. The present invention uses a photodetector with at least four active areas to sense the reflected laser beam. A differential amplitude tracking error signal is generated by comparing the signal strength in the different active areas.
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