发明授权
US07289284B2 Stray field detector, magnetic disk drive, and method of head escaping
失效
杂散场检测器，磁盘驱动器和头部逃逸方法
- 专利标题： Stray field detector, magnetic disk drive, and method of head escaping
- 专利标题（中）： 杂散场检测器，磁盘驱动器和头部逃逸方法
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申请号： US11195202申请日： 2005-08-01
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公开(公告)号： US07289284B2公开(公告)日： 2007-10-30
- 发明人: Reiko Arai , Takehiko Hamaguchi , Atsushi Kikugawa , Hideaki Maeda , Liping Shen , Mikio Suzuki
- 申请人： Reiko Arai , Takehiko Hamaguchi , Atsushi Kikugawa , Hideaki Maeda , Liping Shen , Mikio Suzuki
- 申请人地址： NL Amsterdam
- 专利权人： Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人： Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人地址： NL Amsterdam
- 代理机构： Townsend and Townsend and Crew LLP
- 代理商 Matthew Zieses
- 优先权： JP2004-226319 20040803
- 主分类号： G11B5/02
- IPC分类号： G11B5/02
摘要：
Embodiments of the invention prevent demagnetization or degaussing of recorded magnetizations, even if a stray field is applied. In one embodiment, an output of a read head including a magneto-resistive effect element is inputted to a stray field detector through a DC amplifier and a DC filter. The stray field detector monitors dc components of the output from the read head, and escapes a head from above a magnetic recording medium.
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