发明申请
US20070025216A1 Apparatus and method for detecting tracking error signal using multiple phase clocks
有权
使用多个相位时钟检测跟踪误差信号的装置和方法
- 专利标题: Apparatus and method for detecting tracking error signal using multiple phase clocks
- 专利标题(中): 使用多个相位时钟检测跟踪误差信号的装置和方法
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申请号: US11492804申请日: 2006-07-26
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公开(公告)号: US20070025216A1公开(公告)日: 2007-02-01
- 发明人: Je-kook Kim , Jun-ho Huh , Sang-hoon Moon
- 申请人: Je-kook Kim , Jun-ho Huh , Sang-hoon Moon
- 优先权: KR10-2005-0068539 20050727
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An apparatus and method for digitally detecting a tracking error signal using multiple phase clocks. The apparatus includes a phase extractor receiving four divided outputs in response to light reflected from an optical disk and extracting four divided phases, respectively, a phase difference detector detecting phase differences between two phases among the four divided phases, a multiple phase clock generator generating a plurality of phase clocks in response to a predetermined clock signal, a phase error detector counting phase differences in response to each of the plurality of phase clocks, summing the counted phase differences, and detecting a phase error, and a tracking error output unit detecting the tracking error signal in response to the phase error and outputting the detected tracking error signal.