发明公开
EP0353852A2 Method and circuitry to suppress additive disturbances in data channels containing MR sensors
失效
的方法和电路，用于抑制在包含数据信道的磁阻传感器添加剂错误。
- 专利标题： Method and circuitry to suppress additive disturbances in data channels containing MR sensors
- 专利标题（中）： 的方法和电路，用于抑制在包含数据信道的磁阻传感器添加剂错误。
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申请号： EP89306362.8申请日： 1989-06-23
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公开(公告)号： EP0353852A2公开(公告)日： 1990-02-07
- 发明人: Jove, Stephen Alan , Klaasen, Klaas Berend , Van Peppen, Jacobus Cornelis Leonardus
- 申请人： International Business Machines Corporation
- 申请人地址： Old Orchard Road Armonk, N.Y. 10504 US
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： Old Orchard Road Armonk, N.Y. 10504 US
- 代理机构： Burt, Roger James, Dr.
- 优先权： US226634 19880801
- 主分类号： G11B20/22
- IPC分类号： G11B20/22 ; G11B20/00
摘要：
A method and circuitry are disclosed for suppressing additive transient disturbances in a data channel; e.g., due to thermal transients caused by an MR transducer contacting a moving storage surface. Positive and negative envelope detectors (11, 12) each have their inputs connected to the channel, and provide respective outputs which are summed (13) and contain an envelope component and a residue component. A buffer (14) interconnects the detectors to allow both detectors (11, 12) to follow rapid positive excursions of the data channel signal. A nonlinear signal-adaptive filter (15) is connected to the summed output to further reduce the residue component. The data channel signal (or preferably the output from a delay means connected to the channel) is summed with the output from the filter. The relative amplitudes of these two outputs is set such that the resulting summed output signal is free of additive disturbances.
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