发明授权
US08824081B1 Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement
有权
采用径向相干参考图形进行伺服脉冲串解调和飞行高度测量的磁盘驱动器
- 专利标题： Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement
- 专利标题（中）： 采用径向相干参考图形进行伺服脉冲串解调和飞行高度测量的磁盘驱动器
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申请号： US13418966申请日： 2012-03-13
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公开(公告)号： US08824081B1公开(公告)日： 2014-09-02
- 发明人: Guoxiao Guo , Jie Yu
- 申请人： Guoxiao Guo , Jie Yu
- 申请人地址： US CA Irvine
- 专利权人： Western Digital Technologies, Inc.
- 当前专利权人： Western Digital Technologies, Inc.
- 当前专利权人地址： US CA Irvine
- 主分类号： G11B5/02
- IPC分类号： G11B5/02
摘要：
A disk drive is disclosed comprising a disk comprising a plurality of data tracks defined by servo sectors. Each servo sector comprises a periodic preamble recorded at a first frequency, servo data, a periodic reference pattern recorded at a second frequency different from the first frequency, and at least one servo burst. A servo sector is processed by processing the periodic preamble to extract the servo data, demodulating the servo burst in response to the periodic reference pattern, generating a position error signal based on the extracted servo data and the demodulated servo burst, and measuring a fly height of the head based on the periodic reference pattern.
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