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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
Applicant: Hiroshi Oyabu , Tatsuhiko Kosugi , Kazuhiko Takaishi
Inventor： Hiroshi Oyabu , Tatsuhiko Kosugi , Kazuhiko Takaishi
CPC classification number: G11B5/5547
Abstract: 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.
Abstract translation: 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：US07443628B2
公开(公告)日：2008-10-28
申请号：US11435190
申请日：2006-05-16
Applicant: Hiroshi Oyabu
Inventor： Hiroshi Oyabu
CPC classification number: G11B19/247 , H02P6/06
Abstract: A default gain table stores values of loop gain of a spindle motor control unit predetermined for each number of media. A loop gain setting unit detects the number of media, reads out a loop gain corresponding to the detected number of media from the default gain table and sets it in the spindle motor control unit. A loop gain measuring unit measures the loop gain of the spindle motor control unit during a test in the manufacturing process, adjusts it into an optimum loop gain, and stores it as a default lop gain in the apparatus.
Abstract translation: 默认增益表存储针对每个媒体数预定的主轴电动机控制单元的环路增益的值。 环路增益设置单元检测介质数量，从默认增益表读出与检测到的介质数量相对应的环路增益，并将其设置在主轴电机控制单元中。 环路增益测量单元在制造过程中测试时测量主轴电机控制单元的回路增益，将其调整为最佳环路增益，并将其作为默认的lop增益存储在设备中。
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公开(公告)号：US20070290641A1
公开(公告)日：2007-12-20
申请号：US11588499
申请日：2006-10-27
Applicant: Hiroshi Oyabu , Takao Abe , Tetsuya Tabuchi
Inventor： Hiroshi Oyabu , Takao Abe , Tetsuya Tabuchi
Abstract: In a storage device, a BEMF control is not performed on a motor and the motor is stopped if the motor is in a BEMF-control possible state. Once the motor has completely stopped, a start-up control is performed on the motor.
Abstract translation: 在存储装置中，如果电动机处于BEMF控制可能状态，则不对电动机执行BEMF控制，并且电动机停止。 一旦电机完全停止，就对电机进行启动控制。
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公开(公告)号：US08625230B2
公开(公告)日：2014-01-07
申请号：US13370230
申请日：2012-02-09
Applicant: Tatsuhiko Kosugi , Kazuhiko Takaishi , Takeshi Hara , Hiroshi Oyabu
Inventor： Tatsuhiko Kosugi , Kazuhiko Takaishi , Takeshi Hara , Hiroshi Oyabu
IPC: G11B20/20
CPC classification number: G11B5/59644 , G11B20/10222 , G11B20/10268 , G11B2020/1281 , G11B2220/2516
Abstract: According to one embodiment, a position demodulator includes a demodulator, a phase corrector, and a position demodulating module. The demodulator demodulates a first demodulated signal and a second demodulated signal having a phase difference of 90 degrees from the first demodulated signal as a result of discrete Fourier transform operation on a read signal of a null servo pattern recorded in a servo area of a medium read out by a head. The phase corrector carries out correction to tilt respective vectors of the first demodulated signal and the second demodulated signal represented on a phase plane by a predetermined angle. The position demodulating module demodulates a positional signal for determining the position of the core of the head based on the first demodulated signal and the second demodulated signal corrected by the phase corrector.
Abstract translation: 根据一个实施例，位置解调器包括解调器，相位校正器和位置解调模块。 解调器作为对记录在介质读取的伺服区域中的无效伺服模式的读取信号的离散傅立叶变换操作的结果，将与第一解调信号相差90度的第一解调信号和第二解调信号解调 出头。 相位校正器执行校正，以将相位平面上表示的第一解调信号和第二解调信号的各矢量倾斜预定角度。 位置解调模块基于由相位校正器校正的第一解调信号和第二解调信号来解调用于确定头的核心的位置的位置信号。
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公开(公告)号：US20120293885A1
公开(公告)日：2012-11-22
申请号：US13370230
申请日：2012-02-09
Applicant: Tatsuhiko KOSUGI , Kazuhiko Takaishi , Takeshi Hara , Hiroshi Oyabu
Inventor： Tatsuhiko KOSUGI , Kazuhiko Takaishi , Takeshi Hara , Hiroshi Oyabu
IPC: G11B5/09
CPC classification number: G11B5/59644 , G11B20/10222 , G11B20/10268 , G11B2020/1281 , G11B2220/2516
Abstract: According to one embodiment, a position demodulator includes a demodulator, a phase corrector, and a position demodulating module. The demodulator demodulates a first demodulated signal and a second demodulated signal having a phase difference of 90 degrees from the first demodulated signal as a result of discrete Fourier transform operation on a read signal of a null servo pattern recorded in a servo area of a medium read out by a head. The phase corrector carries out correction to tilt respective vectors of the first demodulated signal and the second demodulated signal represented on a phase plane by a predetermined angle. The position demodulating module demodulates a positional signal for determining the position of the core of the head based on the first demodulated signal and the second demodulated signal corrected by the phase corrector.
Abstract translation: 根据一个实施例，位置解调器包括解调器，相位校正器和位置解调模块。 解调器作为对记录在介质读取的伺服区域中的无效伺服模式的读取信号的离散傅立叶变换操作的结果，将与第一解调信号相差90度的第一解调信号和第二解调信号解调 出头。 相位校正器执行校正，以将相位平面上表示的第一解调信号和第二解调信号的各矢量倾斜预定角度。 位置解调模块基于由相位校正器校正的第一解调信号和第二解调信号来解调用于确定头的核心的位置的位置信号。
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Patent Agency Ranking
6.发明申请Track pitch examination method of storage apparatus, program, and storage apparatus 失效存储装置，程序和存储装置的跟踪音调检查方法公开(公告)号：US20070263312A1
公开(公告)日：2007-11-15
申请号：US11880170
申请日：2007-07-20
Applicant: Takeshi Hara , Hiroshi Oyabu
Inventor： Takeshi Hara , Hiroshi Oyabu
CPC classification number: G11B5/5556 , G11B5/4555 , G11B5/59688
Abstract: Track pitches of all the tracks of a disk medium provided in a storage apparatus are examined in a manufacturing examination step. First of all, a target position path which varies a target track position so that the position crosses the tracks is generated, and a head actuator is subjected to feedback control so that head detection positions track the target position path. Track pitch abnormality is determined when an error between the target position path and the head detection positions exceeds a predetermined threshold value, and the track number is recorded in a track skip table of the medium. As the target position path, a target position sine-wave path having the amplitude of the width of plural tracks is generated in synchronization with rotation of the medium. As another target position path, a target position straight-line path which passes each track interval in certain time between the outermost and the innermost of the medium is generated.
Abstract translation: 在制造检查步骤中检查设置在存储装置中的盘介质的所有轨道的轨道间距。 首先，产生使目标轨迹位置变化以使得位置越过轨道的目标位置路径，并且对头致动器进行反馈控制，使得头部检测位置跟踪目标位置路径。 当目标位置路径和头部检测位置之间的误差超过预定阈值时确定轨道间距异常，并且轨道号被记录在介质的轨道跳过表中。 作为目标位置路径，与介质的旋转同步地产生具有多个轨道的宽度的幅度的目标位置正弦波路径。 作为另一个目标位置路径，产生在介质的最外侧和最内侧之间的特定时间内通过每个轨迹间隔的目标位置直线路径。
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7.发明申请Switch drive motor apparatus, magnetic disk apparatus, method of decreasing electromagnetic noise of switch drive motor apparatus, and method of decreasing electromagnetic noise of magnetic disk apparatus 审中-公开开关驱动电动机装置，磁盘装置，降低开关驱动电动机装置的电磁噪声的方法以及降低磁盘装置的电磁噪声的方法公开(公告)号：US20050093495A1
公开(公告)日：2005-05-05
申请号：US10973234
申请日：2004-10-26
Applicant: Hiroaki Kobayashi , Hiroshi Oyabu
Inventor： Hiroaki Kobayashi , Hiroshi Oyabu
CPC classification number: G11B19/20
Abstract: A switch drive motor apparatus, includes: a switch drive motor which is rotatable by making a sequential switching; and a motor speed controller configured to drive the switch drive motor while varying a speed of the switch drive motor.
Abstract translation: 一种开关驱动电动机装置，包括：通过进行顺序切换而旋转的开关驱动电动机; 以及电动机速度控制器，被配置为在改变开关驱动电动机的速度的同时驱动开关驱动电动机。
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公开(公告)号：US06577569B1
公开(公告)日：2003-06-10
申请号：US09544813
申请日：2000-04-07
Applicant: Yoshihiro Yamamoto , Hiroshi Oyabu
Inventor： Yoshihiro Yamamoto , Hiroshi Oyabu
IPC: G11B2024
CPC classification number: G11B27/105 , G11B20/1426 , G11B20/18 , G11B27/10 , G11B2220/2545
Abstract: An optical disk reproducing device, comprises a judgement circuit which, under an operating condition in which demodulated data amounting for one frame are being stored in a memory in synchronism with internally supplemented synchronous signals, and when an external first synchronous signal is detected from read-out signals, judges whether the external first synchronous signal appears in the first half or in the second half in the period of the internally supplemented synchronous signal, and when the judgement circuit judges that the external first synchronous signal appeared in the first half of the period of the internally supplemented synchronous signal, the demodulated data amounting for one frame are stored in the memory at a memory position for the immediately previous frame.
Abstract translation: 一种光盘再现装置，包括判断电路，在与内部补充的同步信号同步的情况下，将与一帧相关的解调数据正在存储在存储器中的操作条件下，以及当从读取单元检测到外部第一同步信号时， 在内部补充的同步信号的周期中判断外部第一同步信号是否出现在前半部分或后半部分，并且当判断电路判断外部第一同步信号出现在周期的前半段时 对于内部补充的同步信号，一帧的解调数据被存储在存储器中，用于紧接在前一帧的存储位置。
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公开(公告)号：US06490234B1
公开(公告)日：2002-12-03
申请号：US09525015
申请日：2000-03-14
Applicant: Naruhiro Okamoto , Hiroshi Oyabu
Inventor： Naruhiro Okamoto , Hiroshi Oyabu
IPC: G11B700
CPC classification number: G11B7/0945 , G11B7/08511 , G11B7/094
Abstract: Through a provision of a level holding circuit in a focus servo mechanism for an optical disk reproducing device, a detection signal level with regard to a focusing position error, when a detection signal corresponding to a received optical beam amount shows a maximum value under a condition when not being changed over to an automatic focus loop, is sampled as an offset amount and, is held in advance in the level holding circuit, and the thus held level is utilized for effecting an automatic focusing under a just focusing servo condition.
Abstract translation: 通过在光盘再现装置的聚焦伺服机构中设置电平保持电路，当对应于接收光束量的检测信号在条件下显示最大值时，关于聚焦位置误差的检测信号电平 当没有切换到自动对焦环时，被采样为偏移量，并且被预先保持在电平保持电路中，并且由此保持的电平用于在刚刚聚焦伺服条件下进行自动聚焦。
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公开(公告)号：US07479747B2
公开(公告)日：2009-01-20
申请号：US11588499
申请日：2006-10-27
Applicant: Hiroshi Oyabu , Takao Abe , Tetsuya Tabuchi
Inventor： Hiroshi Oyabu , Takao Abe , Tetsuya Tabuchi
IPC: H02P7/00
Abstract: In a storage device, a BEMF control is not performed on a motor and the motor is stopped if the motor is in a BEMF-control possible state. Once the motor has completely stopped, a start-up control is performed on the motor.
Abstract translation: 在存储装置中，如果电动机处于BEMF控制可能状态，则不对电动机执行BEMF控制，并且电动机停止。 一旦电机完全停止，就对电机进行启动控制。
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