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    • 8. 发明申请
    • Optical disk tracking servo circuit enabled to compensate for non-continuous track segments or prolonged defect
    • 光盘跟踪伺服电路能够补偿非连续轨道段或延长缺陷
    • US20050270942A1
    • 2005-12-08
    • US10887985
    • 2004-07-09
    • Francis KingJeffrey Liu
    • Francis KingJeffrey Liu
    • G11B7/00G11B7/09G11B19/04G11B20/18
    • G11B20/18G11B7/0948G11B19/04
    • The invention pertains to an improvement for a tracking and focusing servo and defect management circuit that controls the tracking and focusing of an optical head on an optical media in an apparatus for reproducing a data, sound or image recorded on the optical media. The invention characterizes by the provision of a circuit for managing modulation of an RF signal from the optical pickup head caused when the optical pickup head encounters a non-continuous track in segment arrangement or a very long extended defect such as a extended flaw in the disc resulted discontinuous track segment thereon, and an adjusting circuit which manages the loop gain of the tracking servo circuit per the track arrangement of defect detection and a tracking profile, whereby the responsiveness of the optical pickup head is improved and track skipping prevented or recovered.
    • 本发明涉及跟踪和聚焦伺服和缺陷管理电路的改进,其控制在用于再现记录在光学介质上的数据,声音或图像的装置中的光学介质上的光学头的跟踪和聚焦。 本发明的特征在于提供一种用于管理来自光学拾取头的RF信号的调制的电路,当光学拾取头在片段布置中遇到不连续的轨道或非常长的扩展缺陷(例如盘中的延长缺陷)时 在其上形成不连续的轨道段,以及调整电路,其管理每个缺陷检测的轨道布置跟踪轮廓的跟踪伺服电路的环路增益,从而提高光学拾取头的响应性并防止或恢复轨迹跳跃。