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8 条记录 (耗时 0.015 秒)

    Phase slip recovery
    1.
    发明授权
    Phase slip recovery 有权

    公开(公告)号：US10446185B2

    公开(公告)日：2019-10-15

    申请号：US15707396

    申请日：2017-09-18

    申请人： Seagate Technology LLC

    发明人： Richard P. Michel ,  Michael J. Link ,  Anand R. Kharpate ,  Guofang Xu

    IPC分类号： G11B20/18 ,  G11B20/10 ,  G06F11/08

    摘要： Systems, devices, and method for phase slip recovery may include reading a plurality of data portions of a data block and positioning a mask over one or more data portions of the data block. The data portions following the mask may be shifted to provide a masked, reframed data block, and then the data block may be attempted to be decoded, which may be repeated until the data block is decoded.

    Self-adapting phase-locked loop filter for use in a read channel
    2.
    发明授权
    Self-adapting phase-locked loop filter for use in a read channel 有权
    用于读通道的自适应锁相环滤波器

    公开(公告)号：US09525576B1

    公开(公告)日：2016-12-20

    申请号：US14808736

    申请日：2015-07-24

    申请人： Seagate Technology LLC

    发明人： Ara Patapoutian ,  Belkacem Derras ,  William Michael Radich ,  Michael J. Link ,  Bruce Douglas Buch

    IPC分类号： H04L27/148 ,  H04L7/033

    CPC分类号： H04L7/033 ,  H03L7/00 ,  H03L7/0807 ,  H03L7/091 ,  H03L7/093 ,  H03L7/107 ,  H04L1/0016 ,  H04L7/0332 ,  H04L27/148 ,  H04L43/16

    摘要： A phase-locked loop (PLL) filter of a read channel includes a filter portion having an input coupled to delay circuitry having an output. The input of the filter portion is configured to receive a phase error signal. A look-up table is coupled to the filter portion. The look-up table comprises phase coefficients and frequency coefficients associated with a plurality of phase error magnitudes. The look-up table is configured to provide one or both of a selected phase coefficient and a selected frequency coefficient based on a magnitude of the phase error signal. The PLL filter is configured to adjust a bandwidth of the filter portion using one or both of the selected phase coefficient and the selected frequency coefficient. A phase signal indicative of estimated phase disturbance is produced at the output of the delay circuitry.

    摘要翻译： 读通道的锁相环（PLL）滤波器包括具有耦合到具有输出的延迟电路的输入的滤波器部分。 滤波器部分的输入被配置为接收相位误差信号。 查找表连接到过滤器部分。 查找表包括与多个相位误差量值相关联的相位系数和频率系数。 查找表被配置为基于相位误差信号的幅度提供所选择的相位系数和所选择的频率系数中的一个或两个。 PLL滤波器被配置为使用选择的相位系数和所选频率系数中的一个或两个来调整滤波器部分的带宽。 在延迟电路的输出处产生指示估计相位扰动的相位信号。

    Noise cancellation using cross-track scans
    5.
    发明授权
    Noise cancellation using cross-track scans 有权
    使用交叉轨迹扫描消除噪音

    公开(公告)号：US08913341B1

    公开(公告)日：2014-12-16

    申请号：US13956043

    申请日：2013-07-31

    申请人： Seagate Technology LLC

    发明人： Jason C. Jury ,  Michael J. Link

    IPC分类号： G11B21/02 ,  G11B20/10

    CPC分类号： G11B20/10046

    摘要： Multiple signals are read, respectively, from multiple different cross-track positions of a track of a magnetic medium. Weighting coefficients for each of the multiple signals are determined. The weighting coefficients are applied to the respective signals to form weighted signals. The weighted signals are combined and the combined signal is used to recover data stored in the track.

    摘要翻译： 分别从磁介质的磁道的多个不同的交叉轨道位置读取多个信号。 确定多个信号中的每一个的加权系数。 加权系数被施加到各个信号以形成加权信号。 加权信号被组合，并且组合信号用于恢复存储在轨道中的数据。

    PHASE ERROR RECOVERY CIRCUITRY AND METHOD FOR A MAGNETIC RECORDING DEVICE
    8.
    发明申请
    PHASE ERROR RECOVERY CIRCUITRY AND METHOD FOR A MAGNETIC RECORDING DEVICE 有权
    相位误差恢复电路和磁记录装置的方法

    公开(公告)号：US20170025147A1

    公开(公告)日：2017-01-26

    申请号：US14808721

    申请日：2015-07-24

    申请人： Seagate Technology LLC

    发明人： Michael J. Link ,  Bruce Douglas Buch ,  Belkacem Derras

    IPC分类号： G11B20/10 ,  G11B20/18 ,  G11B5/09

    CPC分类号： G11B20/1024 ,  G11B5/09 ,  G11B20/1816 ,  G11B2005/0021 ,  G11B2020/183

    摘要： A recording head is configured to write and read data sectors to and from a recording medium, such as a heat-assisted recording medium. A read channel is coupled to the recording head. Phase-locked loop (PLL) circuitry of the read channel is configured to detect a change in a phase error at a location of the data sector. The phase error change may be indicative of a mode-hop that occurred while writing the data sector to the medium. The PLL circuitry is configured to determine a phase offset using the phase error. A controller is configured to effect re-reading of the data sector location using the phase offset to recover the data sector location.

    摘要翻译： 记录头被配置为向诸如热辅助记录介质的记录介质写入和读取数据扇区。 读通道耦合到记录头。 读通道的锁相环（PLL）电路被配置为检测数据扇区位置处的相位误差的变化。 相位误差变化可以指示在将数据扇区写入介质时发生的模式跳跃。 PLL电路被配置为使用相位误差来确定相位偏移。 控制器被配置为使用相位偏移来重新读取数据扇区位置，以恢复数据扇区位置。