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    Device for generating high frequency magnetic fields in a rest-frame of a magnetic medium
    3.
    发明授权
    Device for generating high frequency magnetic fields in a rest-frame of a magnetic medium 有权
    用于在磁介质的静止框架中产生高频磁场的装置

    公开(公告)号：US08514519B2

    公开(公告)日：2013-08-20

    申请号：US12603443

    申请日：2009-10-21

    申请人： Bruce Alvin Gurney ,  Manfred Ernst Schabes ,  Bruce Alexander Wilson

    发明人： Bruce Alvin Gurney ,  Manfred Ernst Schabes ,  Bruce Alexander Wilson

    IPC分类号： G11B5/187 ,  G11B5/127

    CPC分类号： G11B5/3133 ,  G11B2005/001

    摘要： A magnetic head having a magnetic wiggler structure for initiating a high frequency magnetic oscillation in a magnetic to improve media-writeability and increase data density. The wiggler structure includes a plurality of magnetic layers that are antiparallel coupled with one another across non-magnetic antiparallel coupling layers. The wiggler structure is arranged just up-track from the point of data writing so that the high frequency oscillation is initiated just prior to the writing of data on the magnetic media.

    摘要翻译： 一种具有磁摆动结构的磁头，用于启动磁性中的高频磁振荡以提高介质可写性并增加数据密度。 摆动结构包括在非磁性反平行耦合层上彼此反平行耦合的多个磁性层。 摆动结构从数据写入的角度开始排列正好，从而在磁介质上写入数据之前开始高频振荡。

    Magnetic recording disk and disk drive with track identification using phase-type servo patterns
    4.
    发明授权
    Magnetic recording disk and disk drive with track identification using phase-type servo patterns 有权
    磁记录盘和磁盘驱动器，具有使用相位伺服模式的磁道识别

    公开(公告)号：US08000048B2

    公开(公告)日：2011-08-16

    申请号：US12634240

    申请日：2009-12-09

    申请人： Bruce Alexander Wilson

    发明人： Bruce Alexander Wilson

    IPC分类号： G11B5/09

    CPC分类号： G11B5/855 ,  B82Y10/00 ,  G11B5/59655 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82

    摘要： A magnetic recording disk drive has a disk with a head positioning servo pattern of multiple circumferentially-spaced chevron patterns of discrete patterned servo islands. The disk drive has servo electronics that decodes the chevron patterns to determine the absolute radial position of the head without the need for separate track identification fields. The chevron pattern with the smallest radial period has a radial period P1 and each of the other chevron patterns has a period which is a unique multiple of P1. In one embodiment the first chevron pattern read by the head has period P1 and each successive chevron pattern read by the head has a period that is greater than the period of the chevron pattern immediately preceding it such that the period of each chevron pattern progressively increases.

    摘要翻译： 磁记录盘驱动器具有具有离散图案化伺服岛的多个周向间隔的人字纹图案的头定位伺服图案的盘。 磁盘驱动器具有伺服电子装置，其解码人字形图案以确定头部的绝对径向位置，而不需要单独的轨迹识别区域。 具有最小径向周期的人字纹图案具有径向周期P1，并且其他人字形图案中的每一个具有作为P1的唯一倍数的周期。 在一个实施例中，由头部读取的第一人字纹图案具有周期P1，并且由头部读取的每个连续的人字纹图案具有比紧接在其前面的人字纹图案的周期大的周期，使得每个人字纹图案的周期逐渐增加。

    Data recording system with servo pattern having pseudo-random binary sequences
    8.
    发明授权
    Data recording system with servo pattern having pseudo-random binary sequences 失效
    具有伪随机二进制序列的伺服模式的数据记录系统

    公开(公告)号：US06967808B1

    公开(公告)日：2005-11-22

    申请号：US10845814

    申请日：2004-05-13

    申请人： Zvonimir Z. Bandic ,  Richard M. H. New ,  Bruce Alexander Wilson

    发明人： Zvonimir Z. Bandic ,  Richard M. H. New ,  Bruce Alexander Wilson

    IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B21/10 ,  G11B5/09

    CPC分类号： G11B5/59688 ,  G11B5/5526 ,  G11B20/1217 ,  G11B20/1403 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1287 ,  G11B2220/2516

    摘要： A data recording system, such as a magnetic recording hard disk drive, has a recording medium in which the data tracks have pseudo-random binary sequences for the servo information used to control the position of the recording head. A first pseudo-random binary sequence (PRBS) and a second PRBS identical to the first PRBS but shifted by a portion of the period of the first PRBS are located between the track boundaries in alternating tracks in a first region of the servo pattern and between the track centers in alternating tracks in a second region spaced along the track from said first region. A servo decoder has two correlators, one for each PRBS. Each correlator outputs a dipulse when its PRBS repeats. The difference in amplitude of the dipulses represents the head position signal. The dipulses also control the amplifier for the signal read back by the head and the timing of the track identification (TID) detector.

    摘要翻译： 诸如磁记录硬盘驱动器的数据记录系统具有其中数据轨道具有用于控制记录头的位置的伺服信息的伪随机二进制序列的记录介质。 第一伪随机二进制序列（PRBS）和与第一PRBS相同但被第一PRBS的周期的一部分移位的第二PRBS位于伺服模式的第一区域中的交替轨道中的轨道边界之间，并且位于 所述轨道在与所述第一区域沿所述轨道间隔开的第二区域中的交替轨道中心。 伺服解码器具有两个相关器，每个PRBS一个。 当PRBS重复时，每个相关器输出dipulse。 二次脉冲的幅度差表示磁头位置信号。 该信号还可控制放大器的头部读取信号和磁道识别（TID）检测器的定时。

    SHINGLED MAGNETIC RECORDING (SMR) DISK DRIVE WITH VERIFICATION OF WRITTEN DATA
    9.
    发明申请
    SHINGLED MAGNETIC RECORDING (SMR) DISK DRIVE WITH VERIFICATION OF WRITTEN DATA 有权
    磁带录音（SMR）磁带驱动器，具有书面数据验证功能

    公开(公告)号：US20130148225A1

    公开(公告)日：2013-06-13

    申请号：US13316629

    申请日：2011-12-12

    申请人： Jonathan Darrel Coker ,  Martin Aureliano Hassner ,  Kirk Hwang ,  Bruce Alexander Wilson ,  Roger William Wood

    发明人： Jonathan Darrel Coker ,  Martin Aureliano Hassner ,  Kirk Hwang ,  Bruce Alexander Wilson ,  Roger William Wood

    IPC分类号： G11B27/36

    CPC分类号： G11B19/045

    摘要： A “write-squeeze-verify” method is used for verification of the data that has been written in the annular bands of a shingled magnetic recording disk drive. The writing of data along a track overwrites a portion of the previously written track and thus “squeezes” the data of the previously written track to thereby form a “shingled data track” (SDT). The data in each SDT is read back and verified by performing an error correction check using error correction bits associated with the data written in the SDT, or by comparing the readback data with the data stored in memory. If the data read back is not verified, a write error counter is incremented and a write error frequency is calculated. One or more attempts to write the data can be performed. If the data in the SDT cannot be verified after the attempted rewrite(s), then a “re-try fail” is reported.

    摘要翻译： “写挤压验证”方法用于验证已写入带状磁记录磁盘驱动器的环形带中的数据。 沿着轨道的数据写入将覆盖先前写入的轨道的一部分，从而“挤压”先前写入的轨道的数据，从而形成“带状数据轨道”（SDT）。 通过使用与写入SDT的数据相关联的纠错位执行纠错检查，或通过将回读数据与存储在存储器中的数据进行比较来读取并校验每个SDT中的数据。 如果数据回读未被验证，则写入错误计数器递增，并计算写入错误频率。 可以执行一个或多个写入数据的尝试。 如果在尝试重写后无法验证SDT中的数据，则会报告“重试失败”。