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    A READER STRUCTURE
    1.
    发明申请
    A READER STRUCTURE 审中-公开

    公开(公告)号：US20190088276A1

    公开(公告)日：2019-03-21

    申请号：US16081294

    申请日：2017-02-28

    Applicant: Agency for Science, Technology and Research

    Inventor： Chun Lian ONG ,  Zhimin YUAN ,  Shiming ANG

    IPC: G11B5/39 ,  G11B5/127 ,  G11B5/31

    Abstract: A reader structure, a method of biasing a free layer of a reader structure, and a read head are provided, the reader structure comprises a free layer having a reader edge for interacting with and being proximal to a magnetic media; a first magnetic bias member and a second magnetic bias member each provided adjacent to the free layer, the first and second magnetic bias members being configured to have a first magnetisation direction which is substantially parallel to the reader edge; an additional bias member disposed adjacent to the free layer, the additional bias member further being located proximal to at least one of the first magnetic bias member and the second magnetic bias member, and the additional bias member being configured to have a magnetisation direction that is substantially orthogonal to the first magnetisation direction.

    METHODS FOR READING DATA FROM A STORAGE MEDIUM USING A READER AND STORAGE DEVICES
    3.
    发明申请
    METHODS FOR READING DATA FROM A STORAGE MEDIUM USING A READER AND STORAGE DEVICES 有权
    使用读取器和存储设备从存储介质读取数据的方法

    公开(公告)号：US20140139940A1

    公开(公告)日：2014-05-22

    申请号：US13943726

    申请日：2013-07-16

    Applicant: Agency for Science, Technology and Research

    Inventor： Chun Lian ONG ,  Zhimin YUAN ,  Siang Huei LEONG ,  Bo LIU

    IPC: G11B5/09

    CPC classification number: G11B5/09 ,  G11B5/012 ,  G11B5/02 ,  G11B5/59694 ,  G11B20/10009 ,  G11B20/1217 ,  G11B2020/1238

    Abstract: According to various embodiments, a method for reading data from a storage medium using a reader may be provided. The method may include: reading a first signal with a reader head of the reader at a first position of the storage medium; reading a second signal with a reader head of the reader at a second position of the storage medium; and determining data stored at a pre-determined position of the storage medium based on the first signal and based on the second signal.

    Abstract translation: 根据各种实施例，可以提供一种使用读取器从存储介质读取数据的方法。 该方法可以包括：在存储介质的第一位置读取读取器的读取头的第一信号; 在所述存储介质的第二位置读取读取器的第二信号; 以及基于所述第一信号确定存储在所述存储介质的预定位置的数据，并且基于所述第二信号。

    Data Storage System and a Method for Measuring a Change in a Spacing Between a Head and a Storage Medium of a Data Storage System
    4.
    发明申请
    Data Storage System and a Method for Measuring a Change in a Spacing Between a Head and a Storage Medium of a Data Storage System 有权
    数据存储系统和测量数据存储系统的头部和存储介质间距变化的方法

    公开(公告)号：US20130114161A1

    公开(公告)日：2013-05-09

    申请号：US13666118

    申请日：2012-11-01

    Applicant: Agency for Science, Technology and Research

    Inventor： Zhimin YUAN ,  Bo LIU ,  Shengbin HU ,  Chun Lian ONG

    IPC: G11B27/36

    CPC classification number: G11B27/36 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/607

    Abstract: A method for measuring a change in a spacing between a head and a storage medium of a data storage system. The method includes obtaining a first readback signal from the storage medium using the head at a first spacing between the head and the storage medium, determining a first power spectrum density over a frequency range from the obtained first readback signal, obtaining a second readback signal from the storage medium using the head at a second spacing between the head and the storage medium, determining a second power spectrum density over the frequency range from the obtained second readback signal, and providing a measurement indicative of the change in the spacing based on the determined first power spectrum density and the determined second power spectrum density. A data storage system is also provided.

    Abstract translation: 一种用于测量数据存储系统的头部和存储介质之间的间隔的变化的方法。 该方法包括使用头部以头部和存储介质之间的第一间隔从存储介质获得第一回读信号，从获得的第一回读信号确定频率范围上的第一功率谱密度，从第 所述存储介质以所述头部和所述存储介质之间的第二间隔使用所述头部，从所获得的第二回读信号确定所述频率范围上的第二功率谱密度，并且基于所确定的所述第二回读信号提供指示所述间隔的变化的测量值 第一功率谱密度和确定的第二功率谱密度。 还提供了数据存储系统。

    A MAGNETIC ENCODER
    5.
    发明申请
    A MAGNETIC ENCODER 有权

    公开(公告)号：US20210255003A1

    公开(公告)日：2021-08-19

    申请号：US17253428

    申请日：2019-06-26

    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY, AND RESEARCH

    Inventor： Chun Lian ONG ,  Zhimin YUAN ,  Hongtao WANG ,  Budi SANTOSO

    IPC: G01D5/249 ,  G01D5/14 ,  G01B7/30

    Abstract: Disclosed is a magnetic encoder for determining a position of a first object relative to a second object. The encoder comprises a first magnetic member, a second magnetic member and a sensor member. The sensor member comprises a first sensor for measuring a change in magnetic field of the first magnetic member for deducing an unsigned absolute position of the first object relative to the second object, and a second sensor for measuring a change in magnetic field of the second magnetic member for deducing a sign for the unsigned absolute position. The first magnetic member and first sensor are coupled to respectively different ones of the first object and second object, and the second magnetic member and second sensor are coupled to respectively different ones of the first object and second object.

    METHOD AND SYSTEM FOR ESTIMATING THE POSITION ERROR SIGNAL (PES) METRIC FOR A MAGNETIC STORAGE SYSTEM
    6.
    发明申请
    METHOD AND SYSTEM FOR ESTIMATING THE POSITION ERROR SIGNAL (PES) METRIC FOR A MAGNETIC STORAGE SYSTEM 审中-公开
    用于估计磁存储系统的位置误差信号（PES）公制的方法和系统

    公开(公告)号：US20150055242A1

    公开(公告)日：2015-02-26

    申请号：US14464538

    申请日：2014-08-20

    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

    Inventor： Moulay Rachid ELIDRISSI ,  Kheong Sann CHAN ,  Zhimin YUAN

    IPC: G11B20/10 ,  G11B5/09

    CPC classification number: G11B20/10046 ,  G11B5/09 ,  G11B20/10305 ,  G11B20/10388 ,  G11B20/10472

    Abstract: A method and system for estimating the position error signal (PES) metric for a magnetic storage system. The method comprises the steps of reading multiple readback tracks from a storage medium of the magnetic storage system using respective readers of a multiple reader head positioned at or near a data track of interest; employing an adaptive SMR equalizer to equalize the signals from the multiple read head; and extracting information from the adaptive SMR equalizer sub-filters as an estimate of the PES metric.

    Abstract translation: 一种用于估计磁存储系统的位置误差信号（PES）度量的方法和系统。 该方法包括以下步骤：使用位于感兴趣的数据轨道上或附近的多个读取头的相应读取器从磁性存储系统的存储介质读取多个回读轨迹; 使用自适应SMR均衡器来均衡来自多个读取头的信号; 以及从所述自适应SMR均衡器子滤波器中提取信息作为所述PES度量的估计。

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