利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

239 条记录 (耗时 0.03 秒)

    Methods and apparatus for efficiently controlling a read/write head in a computer disk drive
    31.
    发明授权
    Methods and apparatus for efficiently controlling a read/write head in a computer disk drive 失效
    用于有效地控制计算机磁盘驱动器中的读/写头的方法和装置

    公开(公告)号：US6101064A

    公开(公告)日：2000-08-08

    申请号：US21513

    申请日：1998-02-10

    申请人： Stanley H. Shepherd

    发明人： Stanley H. Shepherd

    IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10

    CPC分类号： G11B5/5534 ,  G11B21/085 ,  G11B21/106 ,  G11B5/59627 ,  G11B5/59644 ,  G11B5/59655 ,  G11B5/59688 ,  G11B5/5965

    摘要： Methods and apparatus for ascertaining a position of a read/write head relative to a reference position on a rotatable disk in a computer disk drive are disclosed. In one aspect of the present invention, a method for determining the position of a read/write head relative to a reference position on a rotatable disk in a computer disk drive includes reading amplitudes of a set of servo bursts embedded in tracks of the disk and classifying the servo bursts into a converging servo burst set and a detection servo burst set around the reference position. The method also includes forming a position error signal by augmenting a detection servo burst signal with a converging servo burst signal as well as a normalization factor. The converging servo burst signal is formed from amplitudes of the converging servo burst set at the position of the read/write head. The detection servo burst signal is formed from amplitudes of the detection servo burst set at the position of the read/write head. The position error signal represents an offset from the reference position.

    摘要翻译： 公开了用于确定读/写头相对于计算机磁盘驱动器中的可旋转盘上的参考位置的位置的方法和装置。 在本发明的一个方面，一种用于确定读/写磁头相对于计算机磁盘驱动器中的可旋转磁盘上的参考位置的位置的方法包括：读取嵌入在磁盘轨道中的一组伺服脉冲串的振幅;以及 将伺服脉冲串分类为聚合伺服脉冲组合和围绕参考位置设置的检测伺服脉冲串。 该方法还包括通过利用会聚伺服脉冲串信号增强检测伺服脉冲串信号以及归一化因子来形成位置误差信号。 会聚伺服脉冲串信号由设置在读/写头位置的会聚伺服脉冲串的幅度形成。 检测伺服脉冲串信号由在读/写头位置设置的检测伺服脉冲串的幅度形成。 位置误差信号表示与参考位置的偏移。

    Off-track PES calibration for a magneto-resistive element
    32.
    发明授权
    Off-track PES calibration for a magneto-resistive element 失效
    用于磁阻元件的离轨PES校准

    公开(公告)号：US5867353A

    公开(公告)日：1999-02-02

    申请号：US706441

    申请日：1996-08-30

    申请人： James A. Valent

    发明人： James A. Valent

    IPC分类号： G11B5/035 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08

    CPC分类号： G11B21/083 ,  G11B5/5534 ,  G11B5/59611 ,  G11B5/59644 ,  G11B5/5965 ,  G11B5/59655 ,  G11B5/59683 ,  G11B5/035 ,  G11B5/4886

    摘要： A method and apparatus for creating a position error signal (PES) voltage v. track distance curve for the head of a hard disk drive. The disk has a dedicated track which contains a plurality of servo bits that allow the head to be centered with the centerline of the track. The dedicated track also has a number of calibration bits each embedded at a known location off-set from the track centerline. The PES voltage v. track distance curve is generated by reading each calibration bit and storing the corresponding amplitude of the position error signal in a memory device of the disk drive. Each calibration bit is located from the track centerline a distance that is different from the other calibration bits so that there are provided multiple points on the track curve.

    摘要翻译： 一种用于产生硬盘驱动器的头部的位置误差信号（PES）电压v。轨迹距离曲线的方法和装置。 磁盘具有专用磁道，其包含允许磁头与轨道的中心线对中的多个伺服位。 专用轨道还具有多个校准位，每个校准位嵌入在与轨道中心线偏离的已知位置。 通过读取每个校准位并将位置误差信号的相应幅度存储在磁盘驱动器的存储器件中来产生PES电压v。轨迹距离曲线。 每个校准位从轨道中心线的距离与其他校准位不同，以便在曲线曲线上提供多个点。

    Adaptive calibration of read/write elements in a disc drive
    35.
    发明授权
    Adaptive calibration of read/write elements in a disc drive 失效
    磁盘驱动器中读/写元件的自适应校准

    公开(公告)号：US5774299A

    公开(公告)日：1998-06-30

    申请号：US696120

    申请日：1996-08-13

    申请人： Michael E. Baum ,  James J. Touchton ,  Keith W. Malang

    发明人： Michael E. Baum ,  James J. Touchton ,  Keith W. Malang

    IPC分类号： G11B5/596 ,  G11B21/10

    CPC分类号： G11B5/59622 ,  G11B21/106 ,  G11B5/59627 ,  G11B5/59644

    摘要： The track follow gain control of an actuator controller is calibrated by injecting a sinusoidal signal into the position error signal during a servo burst interrupt. The injected signal is bandpass filtered to optimize the coherence of the measurement. A sine error signal is derived based on the filtered (sine actual) signal and a sine desired signal. The sine error signal is applied to the track follow gain control to adjust the amplitude of the control signal to the actuator based on the sine error signal. The sine error is derived by averaging the peaks of the filtered injected signal and subtracting the averaged signal from the desired signal which represents the expected error of the sinusoidal signal under ideal conditions. The recording surfaces may be segmented into a plurality of radial zones in which case a central track is identified in one zone on a selected disc surface. The sine error signal is derived for that zone, after which the process is repeated for the corresponding zone of each other recording surface. The sine error signals derived from the several disc surfaces are averaged to adjust the track follow gain control for the common zone of all disc surfaces.

    摘要翻译： 通过在伺服突发中断期间将正弦信号注入位置误差信号来校准致动器控制器的跟踪增益控制。 被注入的信号被带通滤波以优化测量的相干性。 基于滤波（正弦实际）信号和正弦期望信号导出正弦误差信号。 正弦误差信号被施加到跟踪跟随增益控制，以基于正弦误差信号来调节到致动器的控制信号的幅度。 正弦误差是通过对滤波后的注入信号的峰值进行平均而从理想条件下的正弦信号的期望误差的期望信号中减去平均信号得到的。 记录表面可以被分割成多个径向区域，在这种情况下，在所选择的盘表面上的一个区域中识别出中心轨迹。 对于该区域导出正弦误差信号，之后对每个其他记录表面的相应区域重复该过程。 从几个盘表面导出的正弦误差信号被平均以调整所有盘表面的公共区域的跟踪增益控制。

    Radial self propagation pattern generation for disk file servowriting
    36.
    发明授权
    Radial self propagation pattern generation for disk file servowriting 失效
    径向自传模式生成磁盘文件伺服驱动

    公开(公告)号：US5659436A

    公开(公告)日：1997-08-19

    申请号：US405261

    申请日：1995-03-16

    申请人： Edward John Yarmchuk ,  Mark Delorman Schultz ,  Bucknell C. Webb ,  Timothy Joseph Chainer

    发明人： Edward John Yarmchuk ,  Mark Delorman Schultz ,  Bucknell C. Webb ,  Timothy Joseph Chainer

    IPC分类号： G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B21/10

    CPC分类号： G11B5/5534 ,  G11B21/10 ,  G11B21/106 ,  G11B5/59633 ,  G11B5/59644

    摘要： A mechanism for servowriting on a storage medium of a storage device. The storage device has a transducer and a servo loop for positioning the transducer with respect to the storage medium. At least one transition is written on a track of the storage medium, while servoing on other transitions previously recorded on the storage medium. A reference waveform is derived as a function of a closed loop response of the servo loop and a position error waveform. The position error waveform corresponds to one or more position errors of the transducer relative to the previously recorded transitions. The reference waveform is usable in writing subsequent tracks on the storage medium. Using the reference waveform for writing subsequent tracks provides a substantial rejection of mechanical disturbances by the servo loop.

    摘要翻译： 一种用于在存储设备的存储介质上进行伺服驱动的机制。 存储装置具有用于相对于存储介质定位换能器的换能器和伺服回路。 至少一个转换被写在存储介质的轨道上，同时伺服在先前记录在存储介质上的其它转换。 作为伺服环路的闭环响应和位置误差波形的函数导出参考波形。 位置误差波形对应于传感器相对于先前记录的转换的一个或多个位置误差。 参考波形可用于将后续轨道写入存储介质上。 使用参考波形写入后续轨道可以显着抑制伺服回路的机械扰动。

    Servo burst controller for a magnetic disk
    37.
    发明授权
    Servo burst controller for a magnetic disk 失效
    用于磁盘的伺服突发控制器

    公开(公告)号：US5612834A

    公开(公告)日：1997-03-18

    申请号：US454907

    申请日：1995-05-31

    申请人： Clifford E. Strang, Jr.

    发明人： Clifford E. Strang, Jr.

    IPC分类号： G06F3/06 ,  G11B5/55 ,  G11B5/596 ,  G11B19/02 ,  G11B19/04 ,  G11B19/12 ,  G11B20/10 ,  G11B27/30

    CPC分类号： G06F3/0601 ,  G11B19/02 ,  G11B19/04 ,  G11B19/12 ,  G11B20/10 ,  G11B27/3027 ,  G11B5/5526 ,  G11B5/553 ,  G11B5/5534 ,  G11B5/59633 ,  G11B5/59644 ,  G06F2003/0692 ,  G11B2220/20

    摘要： A novel disk controller and method performed by a disk controller is disclosed which provides a highly efficient means of interrupting the reading or writing of a field in a sector on a magnetic disk for skipping over a servo burst located anywhere within the field. The servo burst may be located at a different location in the fields of successive sectors. In the preferred embodiment, the servo burst skipping operation is controlled by microcode in the disk controller's sequencer RAM, and the servo burst skipping operation is initiated by a servo interrupt signal. The servo interrupt signal is generated by the disk controller when a servo burst is to occur. This servo interrupt signal may be generated at fixed time intervals, using a count from a disk clock, or by counting the bytes in a sector leading to the servo burst. The number of bytes leading to the servo burst may vary, and, in one embodiment, the number of bytes before the servo burst occurs within a sector is contained in the ID field for that sector. The servo burst skipping operation performs the steps necessary for skipping over the servo burst and causing the microcode to return to an appropriate instruction in the microcode.

    摘要翻译： 公开了一种由磁盘控制器执行的新颖的磁盘控制器和方法，该磁盘控制器和方法提供了一种高效的方式来中断在磁盘上的扇区中的磁场的读取或写入，用于跳过位于该场内任何位置的伺服突发。 伺服脉冲串可以位于连续扇区的不同位置。 在优选实施例中，伺服突发跳过操作由盘控制器的定序器RAM中的微码来控制，伺服突发跳过操作由伺服中断信号启动。 当伺服脉冲发生时，伺服中断信号由磁盘控制器产生。 可以使用来自磁盘时钟的计数，或通过对导致伺服脉冲串的扇区中的字节进行计数，以固定的时间间隔生成该伺服中断信号。 导致伺服脉冲串的字节数可以变化，并且在一个实施例中，扇区内发生伺服突发之前的字节数被包含在该扇区的ID字段中。 伺服突发跳过操作执行跳过伺服脉冲串所必需的步骤，并使微代码返回到微代码中的适当指令。

    MAGNETIC DISK DEVICE
    38.
    发明公开
    MAGNETIC DISK DEVICE 审中-公开

    公开(公告)号：US20240087603A1

    公开(公告)日：2024-03-14

    申请号：US18515762

    申请日：2023-11-21

    申请人： Kabushiki Kaisha Toshiba ,  Toshiba Electronic Devices & Storage Corporation

    发明人： Nobuhiro MAETO

    IPC分类号： G11B5/596 ,  G11B20/12

    CPC分类号： G11B5/59644 ,  G11B20/1217 ,  G11B2020/1281 ,  G11B2220/2516

    摘要： According to one embodiment, a magnetic disk device includes a disk that has a track including a first servo sector and a second servo sector that is different from the first servo sector, a head that writes data to the disk and reads data from the disk, and a controller that records first signal strength record data related to a signal strength at which first target servo data that is a target of the first servo sector is read, and standardizes first signal strength data related to a signal strength at which the first target servo data is read when the first target servo data is read.

    Disk drive correcting an error in a detected gray code
    39.
    发明授权
    Disk drive correcting an error in a detected gray code 有权
    磁盘驱动器校正检测到的灰色代码中的错误

    公开(公告)号：US09424871B1

    公开(公告)日：2016-08-23

    申请号：US14576063

    申请日：2014-12-18

    申请人： Western Digital Technologies, Inc.

    发明人： Guoxiao Guo ,  Donald Brunnett ,  Jianguo Zhou ,  Wai Ee Wong

    IPC分类号： G11B5/596 ,  G11B20/10

    CPC分类号： G11B5/59655 ,  G11B5/59627 ,  G11B5/59644 ,  G11B20/10268 ,  G11B20/1403 ,  G11B20/18 ,  G11B2020/10916

    摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by a plurality of servo sectors. An estimated track ID is generated and a plurality of proximate track IDs is generated having values proximate the estimated track ID. A set of Gray codes is generated each corresponding to the estimated track ID and the proximate track IDs, wherein each Gray code in the set of Gray codes comprises N bits, and M bits out of a high order of the N bits comprise the same value. A recorded Gray code is detected in a first servo sector to generate a detected Gray code, and an error in the detected Gray code is corrected by inverting at least one bit in the detected Gray code comprising a value that is different from the value of the corresponding bit in the M bits.

    摘要翻译： 公开了一种磁盘驱动器，包括在包括由多个伺服扇区限定的多个磁道的盘上驱动的磁头。 产生估计的轨道ID，并且生成具有接近估计轨道ID的值的多个邻近轨道ID。 产生一组格雷码，每组格对应于估计的轨道ID和邻近轨道ID，其中格雷码组中的每个格雷码包括N比特，并且N比特的高阶中的M比特包含相同的值 。 在第一伺服扇区中检测到记录的格雷码，以产生检测到的格雷码，并且通过将检测到的格雷码中的至少一个比特反相来校正检测格雷码中的误差，该比特包括不同于 M位中的相应位。