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16 条记录 (耗时 0.023 秒)

    Disk drive employing a sync mark detector comprising a matched filter and a dual polarity correlator
    11.
    发明授权
    Disk drive employing a sync mark detector comprising a matched filter and a dual polarity correlator 有权
    采用包括匹配滤波器和双极性相关器的同步标记检测器的磁盘驱动器

    公开(公告)号：US06603622B1

    公开(公告)日：2003-08-05

    申请号：US09796838

    申请日：2001-02-28

    申请人： Grant S. Christiansen ,  Mark D. Hagen

    发明人： Grant S. Christiansen ,  Mark D. Hagen

    IPC分类号： G11B509

    CPC分类号： G11B27/3027 ,  G11B5/09 ,  G11B5/59683 ,  G11B2005/0016 ,  G11B2220/20

    摘要： The present invention may be regarded as a disk drive comprising a disk having a plurality of data tracks, each data track comprising a plurality of sectors. A sync mark detector detects a sync mark pattern in a sector by filtering a read signal with a matched filter having an impulse response substantially matched to a dibit response of the disk drive. The output of the matched filter is correlated with a dual polarity correlator to generate first and second correlated signals. The sync mark pattern is detected when either the first or second correlated signals exceeds a threshold.

    摘要翻译： 本发明可以被认为是包括具有多个数据磁道的磁盘的磁盘驱动器，每个数据磁道包括多个扇区。 同步标记检测器通过用具有与盘驱动器的双向响应基本匹配的脉冲响应的匹配滤波器对读取信号进行滤波来检测扇区中的同步标记模式。 匹配滤波器的输出与双极性相关器相关，以产生第一和第二相关信号。 当第一或第二相关信号超过阈值时，检测同步标记图案。

    Disk drive with method of constructing a continuous position signal and constrained method of linearizing such position signal while maintaining continuity
    12.
    发明授权
    Disk drive with method of constructing a continuous position signal and constrained method of linearizing such position signal while maintaining continuity 有权
    具有构造连续位置信号的方法的磁盘驱动器以及在保持连续性的同时线性化这种位置信号的约束方法

    公开(公告)号：US06369974B1

    公开(公告)日：2002-04-09

    申请号：US09248087

    申请日：1999-02-09

    申请人： Saeed Asgari ,  Mark D. Hagen

    发明人： Saeed Asgari ,  Mark D. Hagen

    IPC分类号： G11B5596

    CPC分类号： G11B5/59655

    摘要： A method for constructing and linearizing a position error signal (PES) derived from primary and quadrature servo burst pairs in an embedded servo disk drive. The construction method mathematically provides predetermined transition values at the commutation positions connecting adjacent PES segments so that the overall, indicated position signal is numerically continuous from segment to segment. The linearization method compensates for nonlinearity in the PES segments, and thereby in the indicated position signal, without affecting the predetermined transition values at all, or by modifying the predetermined transition values while maintaining continuity.

    摘要翻译： 一种用于构造和线性化从嵌入式伺服磁盘驱动器中的主要和正交伺服突发对导出的位置误差信号（PES）的方法。 该构造方法在连接相邻PES段的换向位置上以数学方式提供预定的转变值，使得总体指示的位置信号在分段之间是数字连续的。 线性化方法补偿PES段中的非线性，从而补偿指示位置信号，而不影响预定的转换值，或通过修改预定的转换值同时保持连续性。

    Calibration method for station orientation
    13.
    发明授权
    Calibration method for station orientation 有权
    车站定位校正方法

    公开(公告)号：US07389052B2

    公开(公告)日：2008-06-17

    申请号：US10060549

    申请日：2002-01-30

    申请人： Eric Gregory Oettinger ,  Mark David Heminger ,  Mark D. Hagen

    发明人： Eric Gregory Oettinger ,  Mark David Heminger ,  Mark D. Hagen

    IPC分类号： H04B10/10 ,  H04B10/24

    CPC分类号： H04B10/1123

    摘要： In optical wireless networks, light beams are transmitted over-the-air and maximum performance is achieved when light beams are aligned with corresponding light detectors. A feedback control system is created between transmitting and receiving units, wherein the receiving unit provides positional data about the light beam from the transmitting unit. The transmitting unit uses the data provided to make adjustments to its light beam. However, in order to use the positional data, the units must be operating with a common coordinate basis. A method is provided for determining the basis and generating the transformation needed to modify positional data from one unit into information that is useful for the other unit. Additionally, a method is presented for using the positional data to maintain proper alignment of the light beam.

    摘要翻译： 在光无线网络中，光束通过空中传输，并且当光束与对应的光检测器对准时获得最大的性能。 在发射和接收单元之间创建反馈控制系统，其中接收单元提供关于来自发射单元的光束的位置数据。 发送单元使用提供的数据来调整其光束。 然而，为了使用位置数据，单位必须以共同的坐标为基础进行操作。 提供了一种用于确定基础并产生将位置数据从一个单元修改为对其他单元有用的信息所需的变换的方法。 另外，提出了使用位置数据来保持光束的适当对准的方法。

    Disk drive that discerns the polarity of a head signal from a sync mark to enhance data detection
    14.
    发明授权
    Disk drive that discerns the polarity of a head signal from a sync mark to enhance data detection 有权
    从同步标记识别头信号的极性的磁盘驱动器，以增强数据检测

    公开(公告)号：US06639748B1

    公开(公告)日：2003-10-28

    申请号：US09796933

    申请日：2001-02-28

    申请人： Grant S. Christiansen ,  Mark D. Hagen

    发明人： Grant S. Christiansen ,  Mark D. Hagen

    IPC分类号： G11B509

    CPC分类号： G11B27/3027 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59616 ,  G11B2220/20

    摘要： The present invention may be regarded as a disk drive comprising a disk having a plurality of data tracks, each data track comprising a plurality of sectors. A sync mark detector detects a sync mark pattern in a sector, wherein when the sync mark pattern is detected a sync mark detect signal and a polarity signal are generated. The polarity signal represents an expected polarity of pulses in a read signal representing data stored in the sector, wherein the polarity signal enhances the detection of an estimated data sequence from the read signal.

    摘要翻译： 本发明可以被认为是包括具有多个数据磁道的磁盘的磁盘驱动器，每个数据磁道包括多个扇区。 同步标记检测器检测扇区中的同步标记图案，其中当检测到同步标记图案时，产生同步标记检测信号和极性信号。 极性信号表示表示存储在扇区中的数据的读取信号中的脉冲的预期极性，其中极性信号增强了从读取信号中的估计数据序列的检测。

    Disk drive having a write condition detector for suspending write operations while a transducer flying height deviates from its operating flying height
    15.
    发明授权
    Disk drive having a write condition detector for suspending write operations while a transducer flying height deviates from its operating flying height 失效
    磁盘驱动器具有写入状态检测器，用于在换能器飞行高度偏离其操作飞行高度时暂停写入操作

    公开(公告)号：US06249393B1

    公开(公告)日：2001-06-19

    申请号：US09098319

    申请日：1998-06-16

    申请人： Russell A. Billings ,  Shafa Dahandeh ,  Mark D. Hagen

    发明人： Russell A. Billings ,  Shafa Dahandeh ,  Mark D. Hagen

    IPC分类号： G11B2736

    CPC分类号： G11B19/04 ,  G11B5/012 ,  G11B5/6029 ,  G11B20/10009 ,  G11B27/36 ,  G11B2220/20

    摘要： A disk drive with a write condition detector generates a write condition signal from a reference signal to warn of a high fly write or a low fly write. The reference signal is generated by the disk drive read/write head by reading a reference segment. The write condition detector processes fly-height varying components from the reference signal. The write condition detector generates a write condition signal, responsive to the fly-height varying components and the threshold, that indicates that the writing of data in a user data segment during the write operation is unsafe when the head deviates from its operating flying-height. The threshold is computed using zone coefficients determined during an intelligent burn in of the disk drive, and is based on a nominal fly height. The write condition signal is processed by a microprocessor that instructs a disk controller to deactivate a write gate controlling the write operation. The disk drive then implements verification, diagnostics and recovery steps to complete the write operation.

    摘要翻译： 具有写入条件检测器的磁盘驱动器从参考信号产生写入条件信号，以警告高速写入或低速写入。 参考信号由磁盘驱动器读/写头通过读取参考段产生。 写状态检测器根据参考信号处理飞高变化的分量。 写条件检测器响应于飞高变化分量和阈值产生写入条件信号，其指示当写入操作期间在头部偏离其操作飞行高度时写入用户数据段中的数据是不安全的 。 使用在磁盘驱动器的智能刻录期间确定的区域系数来计算阈值，并且基于标称飞行高度。 写入状态信号由微处理器处理，微处理器指示磁盘控制器停止控制写入操作的写入门。 然后，磁盘驱动器实现验证，诊断和恢复步骤来完成写入操作。