Periodic time self-adapting repeat controller used for blue-light high-density optical disk servo-system |
Title: |
Periodic time self-adapting repeat controller used for blue-light high-density optical disk servo-system |
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Application Number: |
200710176049 |
Application Date: |
2007/10/18 |
Announcement Date: |
2008/03/05 |
Pub. Date: |
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Publication Number: |
101136217 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
G11B 7/09, G11B 7/095 |
Applicant(s): |
Tsinghua University |
Inventor(s): |
Ni Yi, Shen Quanhong, Pan Longfa, Pei Jing, Xu Haizheng, Xiong Jianping |
Key Words: |
Periodic time self-adapting, repeat controller, blue-light high-density, optical disk, servo-system |
Abstract: |
A period self-adapted repeat controller adapted to various CD servo systems, especially adapted to blue light high-density CD system, is disclosed. A repeat controller is overlaid to a traditional phase correction controller in CD servo system, and the cut-off frequency of a low-pass filter in the repeat controller is reasonably designed to ensure the stability of the system. The link self-adapted CD rotation period can correct the link of delayed period of the repeat controller in real time. The repeat controller can be continuously, stably and effectively used in CD servo system. |
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