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公开(公告)号：US20120314321A1
公开(公告)日：2012-12-13
申请号：US13365098
申请日：2012-02-02
IPC分类号： G11B5/54
CPC分类号： G11B5/5547
摘要： According to one embodiment, a position demodulation method includes demodulating a first demodulation signal and a second demodulation signal having a phase difference of 90 degrees to the first demodulation signal based on a read-out signal obtained by reading out a servo pattern recorded on a medium by the head for positioning of a head with respect to the medium; correcting the first and second demodulation signals in which, when a trace of a Lissajous figure is drawn representing the first and second demodulation signals as values on coordinate axes different from each other on a plane, a ratio of respective lengths between intersections of the trace intersecting with two axes orthogonal at an origin of the plane is kept constant; and demodulating a positional signal for determining a position of the head based on the first and second demodulation signals after being corrected at the correcting.
摘要翻译： 根据一个实施例，位置解调方法包括基于通过读出记录在介质上的伺服模式而获得的读出信号来解调具有90度相位差的第一解调信号和第二解调信号与第一解调信号 通过头部相对于介质定位头部; 校正第一和第二解调信号，其中当绘制表示第一和第二解调信号的Lissajous图形的轨迹作为在平面上彼此不同的坐标轴上的值时，迹线的交点之间的相应长度的比率相交 在平面的原点处正交的两个轴保持恒定; 以及在校正后，基于所述第一和第二解调信号来解调用于确定所述头部的位置的位置信号。
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公开(公告)号：US08023219B2
公开(公告)日：2011-09-20
申请号：US12569593
申请日：2009-09-29
申请人： Tatsuhiko Kosugi
发明人： Tatsuhiko Kosugi
CPC分类号： G11B5/59605
摘要： According to one embodiment, a storage device includes an area demodulator and a head position demodulator. The area demodulator demodulates a first demodulation signal and a second demodulation signal having a phase difference of 90° from a read signal by a head of an area demodulation pattern recorded on a medium. The head position demodulator receives the first demodulation signal and the second demodulation signal, and outputs a phase angle indicating a direction of a vector formed in a phase plane by the first demodulation signal and the second demodulation signal as a head position signal.
摘要翻译： 根据一个实施例，存储设备包括区域解调器和头部位置解调器。 区域解调器通过记录在介质上的区域解调图案的头部将与读取信号相差90°的第一解调信号和第二解调信号解调。 头部位置解调器接收第一解调信号和第二解调信号，并且通过第一解调信号和第二解调信号作为头位置信号输出表示在相位平面中形成的矢量的方向的相位角。
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3.发明授权公开(公告)号：US07463438B2
公开(公告)日：2008-12-09
申请号：US11043492
申请日：2005-01-26
申请人： Tatsuhiko Kosugi , Masahide Kanegae
发明人： Tatsuhiko Kosugi , Masahide Kanegae
CPC分类号： G11B5/59633 , G11B5/59666 , G11B27/36 , G11B2220/20
摘要： An information storage apparatus that records servo information and user data on a recording face of a recording medium wherein a track density measuring unit measures the optimal track density for a recording face corresponding to each head targeting a storage medium on which the servo information has not yet been recorded and a recording density measuring unit measures the optimal linear density for each recording face. A servo frame writing unit writes the servo information varying a track pitch to a track pitch corresponding to the optimal track density measured by the track density measuring unit and a recording frequency to a recording frequency corresponding to the optimal linear density measured by the linear density measuring unit, for each head.
摘要翻译： 一种信息存储装置，其将伺服信息和用户数据记录在记录介质的记录面上，其中轨道密度测量单元测量与针对其上还存在伺服信息的存储介质的每个磁头相对应的记录面的最佳磁道密度 记录密度测量单元测量每个记录面的最佳线密度。 伺服帧写入单元将将轨道间距改变为对应于由轨道密度测量单元测量的最佳轨道密度的轨道音调和记录频率的伺服信息写入对应于通过线性密度测量测量的最佳线性密度的记录频率 单位，每个头。
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公开(公告)号：US07196865B2
公开(公告)日：2007-03-27
申请号：US10691336
申请日：2003-10-22
IPC分类号： G11B5/596
CPC分类号： G11B5/5547
摘要： A recording apparatus capable of securely reading out data for causing a head to follow along circular tracks set virtually. Therefore, on-track control along the virtual tracks is possible by the conversion data on the discoid record medium even when, for example, the printed circuit board in a recording apparatus has been replaced.
摘要翻译： 一种记录装置，其能够安全地读出用于使磁头沿着实际设置的圆形轨迹跟随的数据。 因此，即使例如记录装置中的印刷电路板已被更换，通过盘状记录介质上的转换数据也可以沿着虚拟轨道进行磁道轨迹控制。
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公开(公告)号：US20060221479A1
公开(公告)日：2006-10-05
申请号：US11152357
申请日：2005-06-14
申请人： Tatsuhiko Kosugi , Yoshiyuki Kagami
发明人： Tatsuhiko Kosugi , Yoshiyuki Kagami
IPC分类号： G11B20/10
CPC分类号： G11B20/1426 , G11B20/1217 , G11B27/3027 , G11B2020/1265 , G11B2020/1284 , G11B2220/2516
摘要： A servo-frame recording apparatus includes: a sector information rearranging section for rearranging serial bits of the sector information that is binary data; a first ExOR section for performing the ExOR (exclusive OR) on the sector information, the serial bits of which have been rearranged by said sector information rearranging section, and the track information, so that an exclusive logical sum is obtained; and a writing section for wiring the exclusive logical sum obtained by said ExOR section into the servo frame. With this configuration, a data length required for recording gray information and sector information can be shortened without lowering the reliability of a magnetic disk.
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公开(公告)号：US5675446A
公开(公告)日：1997-10-07
申请号：US353148
申请日：1994-12-09
CPC分类号： G11B5/012 , G11B19/02 , G11B19/12 , G11B25/043 , G11B33/121
摘要： A method of controlling a magnetic disk unit. The method controls the magnetic disk unit which comprises a disk enclosure part and a printed-circuit board part. The disk enclosure part includes at least one magnetic disk, at least one magnetic head and a mechanical part for driving each magnetic disk and each magnetic head. The printed-circuit board part includes a circuit part for controlling the disk enclosure part. The method includes the steps of writing on the magnetic disk version data indicating a type of disk enclosure part after the disk enclosure part and the printed-circuit board part are assembled, and automatically setting the circuit part of the printed-circuit board part depending on the version data which is read from the magnetic disk after the magnetic disk unit is completed.
摘要翻译： 一种控制磁盘单元的方法。 该方法控制包括盘盒部分和印刷电路板部分的磁盘单元。 盘盒部分包括至少一个磁盘，至少一个磁头和用于驱动每个磁盘和每个磁头的机械部件。 印刷电路板部件包括用于控制盘外壳部分的电路部分。 该方法包括以下步骤：在组装盘盒部分和印刷电路板部件之后，写入表示磁盘盒部分类型的磁盘版本数据，并根据来自自动设置印刷电路板部件的电路部分 在磁盘单元完成之后从磁盘读取的版本数据。
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公开(公告)号：US5432659A
公开(公告)日：1995-07-11
申请号：US23806
申请日：1993-02-25
CPC分类号： G11B19/04 , G11B5/5534 , G11B5/5565
摘要： In a magnetic disk unit, a magnetic head to be activated is switched from a first magnetic head to a second magnetic head in accordance with an instruction supplied from a host system in a state where a plurality of magnetic heads are positioned at a cylinder on magnetic disks. The magnetic disk unit includes a digital servo controller for monitoring at predetermined intervals whether or not the instruction for the changing of the magnetic head is supplied from the host system, a first output circuit for outputting a first signal for a predetermined time from a time at which the digital servo controller recognizes that the instruction for the changing of the magnetic head is supplied from the host system, and a second output circuit for outputting a second signal at least from a time at which the instruction for the changing of the magnetic head is input to the magnetic disk unit to a time at which the digital servo controller recognizes that the instruction is supplied from the host system. The first signal and the second signal indicate that the magnetic disk unit is busy adjusting the plurality of magnetic heads so that an off-track error of the second magnetic head is cancelled.
摘要翻译： 在磁盘单元中，在多个磁头位于磁盘上的磁体的状态下，根据从主机系统提供的指令，将被激活的磁头从第一磁头切换到第二磁头 磁盘。 磁盘单元包括数字伺服控制器，用于以预定间隔监视是否从主机系统提供用于改变磁头的指令;第一输出电路，用于从第一输出电路输出预定时间 数字伺服控制器识别出从主机系统提供改变磁头的指令，以及至少从磁头改变指令的时刻输出第二信号的第二输出电路是 输入到磁盘单元到数字伺服控制器识别出从主机系统提供指令的时间。 第一信号和第二信号表示磁盘单元忙于调整多个磁头，从而消除第二磁头的偏离磁道误差。
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公开(公告)号：US08553345B2
公开(公告)日：2013-10-08
申请号：US13365098
申请日：2012-02-02
CPC分类号： G11B5/5547
摘要： According to one embodiment, a position demodulation method includes demodulating a first demodulation signal and a second demodulation signal having a phase difference of 90 degrees to the first demodulation signal based on a read-out signal obtained by reading out a servo pattern recorded on a medium by the head for positioning of a head with respect to the medium; correcting the first and second demodulation signals in which, when a trace of a Lissajous figure is drawn representing the first and second demodulation signals as values on coordinate axes different from each other on a plane, a ratio of respective lengths between intersections of the trace intersecting with two axes orthogonal at an origin of the plane is kept constant; and demodulating a positional signal for determining a position of the head based on the first and second demodulation signals after being corrected at the correcting.
摘要翻译： 根据一个实施例，位置解调方法包括基于通过读出记录在介质上的伺服模式而获得的读出信号来解调具有90度相位差的第一解调信号和第二解调信号与第一解调信号 通过头部相对于介质定位头部; 校正第一和第二解调信号，其中当绘制表示第一和第二解调信号的Lissajous图形的轨迹作为在平面上彼此不同的坐标轴上的值时，迹线的交点之间的相应长度的比率相交 在平面的原点处正交的两个轴保持恒定; 以及在校正后，基于所述第一和第二解调信号来解调用于确定所述头部的位置的位置信号。
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公开(公告)号：US06556368B1
公开(公告)日：2003-04-29
申请号：US09412039
申请日：1999-10-04
申请人： Kazunori Mori , Tatsuhiko Kosugi
发明人： Kazunori Mori , Tatsuhiko Kosugi
IPC分类号： G11B2102
CPC分类号： G11B5/59627 , G11B5/5565 , G11B21/106
摘要： A method for controlling a disk apparatus in which a head scans tracks on a disk to record or retrieve information. The method includes a position error detection procedure which detects a position error between said head and said track, a phase control procedure which advances a phase of said position error detected by said position error detection procedure by a predetermined value and a head control procedure which controls a position of said head according to the position error which is advanced in phase by said phase control procedure.
摘要翻译： 一种用于控制磁盘装置的方法，其中磁头扫描磁盘上的磁迹以记录或检索信息。 该方法包括：检测所述头部和所述轨道之间的位置误差的位置误差检测过程，将通过所述位置误差检测过程检测到的所述位置误差的相位推进预定值的相位控制过程，以及控制 所述头部根据通过所述相位控制程序进行同步的位置误差的位置。
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公开(公告)号：US06535348B1
公开(公告)日：2003-03-18
申请号：US09413649
申请日：1999-10-06
申请人： Yoshiyuki Kagami , Tatsuhiko Kosugi
发明人： Yoshiyuki Kagami , Tatsuhiko Kosugi
IPC分类号： G11B5596
CPC分类号： G11B5/596
摘要： A servo control method and an information storage device are provided. In the method and device, positional information is detected in accordance with servo information including a plurality of positional regions having phase differences between tracks. The positional regions consist of a first positional region in which the phase difference between tracks is +90°, a second positional region in which the phase difference between tracks is −90°, a third positional region in which the phase difference between tracks is +90°, and a fourth positional region in which the phase difference between tracks is −135°. A deviation from a reference track is detected from the phase difference between the vector of a reproduction signal of the second positional region and the vector of a reproduction signal of the fourth positional region. Thus, a wide range of deviation can be detected.
摘要翻译： 提供伺服控制方法和信息存储装置。 在该方法和装置中，根据包括轨道之间具有相位差的多个位置区域的伺服信息来检测位置信息。 位置区域由轨道之间的相位差为+ 90°的第一位置区域，轨道之间的相位差为-90°的第二位置区域，轨道之间的相位差为+ 90°，轨道之间的相位差为-135°的第四位置区域。 根据第二位置区域的再现信号的向量与第四位置区域的再现信号的向量之间的相位差来检测与参考轨迹的偏差。 因此，可以检测到宽范围的偏差。
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