发明授权
- 专利标题： Phase difference detection circuit, phase difference detecting method, optical disk drive, and optical disk drive controlling method
- 专利标题（中）： 相位差检测电路，相位差检测方法，光盘驱动器和光盘驱动器控制方法
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申请号： US11287435申请日： 2005-11-28
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公开(公告)号： US07817511B2公开(公告)日： 2010-10-19
- 发明人: Kenji Kobayashi
- 申请人： Kenji Kobayashi
- 申请人地址： JP Kawasaki, Kanagawa
- 专利权人： NEC Electronics Corporation
- 当前专利权人： NEC Electronics Corporation
- 当前专利权人地址： JP Kawasaki, Kanagawa
- 代理机构： McGinn IP Law Group, PLLC
- 优先权： JP2004-355730 20041208
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
An embodiment of the present invention provides a phase difference detection circuit for detecting a phase difference between input data and an input clock generated based on the input data, including: an input data edge position detecting part detecting an edge position of the input data based on an N-phase clock obtained by dividing a predetermined period into N areas (N is an integer of 2 or more); an input clock edge position detecting part detecting an edge position of the input clock based on the input clock and the N-phase clock; and a phase difference detecting part detecting the phase difference between the input data and the input clock based on the edge position of the input data and an edge position of the input clock.
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