公开(公告)号：US5757576A

公开(公告)日：1998-05-26

申请号：US681660

申请日：1996-07-29

申请人： Tatsuhiko Kosugi

发明人： Tatsuhiko Kosugi

IPC分类号： G11B21/10 ,  G11B5/55 ,  G11B5/596 ,  G11B19/28 ,  G11B21/08

CPC分类号： G11B5/5547 ,  G11B21/085 ,  G11B5/59605 ,  G11B5/59688

摘要： A disk apparatus in which the position of a head is detected using servo information recorded on a recording plane of a disk. A first phase difference detecting section uses a zero-cross signal, a master clock, servo patterns corresponding to N cylinders (N is an integer equal to or greater than 2) so as to discriminate the different polarity information items contained in servo patterns from one another and to output phase difference information. A second phase difference detecting section uses the zero-cross signal, the master clock, half the servo patterns corresponding to the N cylinders so as to output phase difference information without discriminating the different polarity information items contained in the servo patterns from one another. When seek operation is performed, a selecting section outputs the phase difference information delivered from the first phase difference detecting section. When on-track control is performed, the selecting section outputs the phase difference information delivered from the second phase difference detecting section. A phase difference information integrating section integrates the phase difference information selected by the selecting section and outputs a position control signal for controlling the positioning of the head. The position signal can be demodulated accurately during/high speed seek operation of the head, without increasing complexity of the processing for the demodulation of the positional signal. The object is to make it possible to demodulate a position signal accurately during high speed seek operation of a head, without increasing complexity of the processing for the demodulation of the positional signal, thereby increasing the reliability of the disk apparatus.

摘要翻译： 使用记录在盘的记录平面上的伺服信息来检测头的位置的盘装置。 第一相位差检测部分使用零交叉信号，主时钟，对应于N个汽缸的伺服模式（N是等于或大于2的整数），以便将包含在伺服模式中的不同极性信息项与一个 另一个并输出相位差信息。 第二相位差检测部分使用零交叉信号，主时钟，对应于N个气缸的一半的伺服模式，以输出相位差信息，而不区分伺服模式中包含的不同极性信息项。 当执行寻道操作时，选择部分输出从第一相位差检测部分输出的相位差信息。 当进行轨道控制时，选择部分输出从第二相位差检测部分发送的相位差信息。 相位差信息积分部分对由选择部分选择的相位差信息进行积分，并输出用于控制头部定位的位置控制信号。 可以在头部的高速寻道操作期间精确地解调位置信号，而不会增加用于解调位置信号的处理的复杂性。 本发明的目的是在头部的高速搜索操作期间能够精确地解调位置信号，而不会增加用于解调位置信号的处理的复杂性，从而增加盘装置的可靠性。

公开(公告)号：US5694265A

公开(公告)日：1997-12-02

申请号：US298052

申请日：1994-08-30

申请人： Tatsuhiko Kosugi ,  Susumu Yoshida ,  Makoto Chiba ,  Syuichi Hashimoto ,  Masahide Kanegae

发明人： Tatsuhiko Kosugi ,  Susumu Yoshida ,  Makoto Chiba ,  Syuichi Hashimoto ,  Masahide Kanegae

IPC分类号： G11B5/596 ,  G11B5/09

CPC分类号： G11B5/596

摘要： A duty pulse is formed by setting in response to a leading edge of a clock synchronized with a peak detection of a servo frame read signal by a peak detecting circuit and by resetting by a signal by which a zero-cross point of a read signal of a phase servo pattern was detected. A head position signal is formed by integrating the duty pulse. Since there is a deviation of the timings between the peak detection and the zero-cross detection, a duty ratio is measured so as to be adjusted to 50% in the on-track state of a target cylinder. The timings for a reference clock and a zero-cross detection pulse are delayed and adjusted accordingly.

摘要翻译： 通过响应于与由峰值检测电路的伺服帧读取信号的峰值检测同步的时钟的前沿设置响应于占空比脉冲，并且通过将信号的读取信号的零交叉点 检测到相位伺服模式。 通过对占空比脉冲进行积分来形成头位置信号。 由于峰值检测和过零检测之间的定时存在偏差，因此在目标气缸的导轨状态下测量占空比以便调整为50％。 参考时钟和零交叉检测脉冲的定时被相应地延迟和调整。

公开(公告)号：US20100134913A1

公开(公告)日：2010-06-03

申请号：US12568239

申请日：2009-09-28

申请人： Tatsuhiko Kosugi ,  Takeyori Hara ,  Toru Ikeda ,  Susumu Yoshida

发明人： Tatsuhiko Kosugi ,  Takeyori Hara ,  Toru Ikeda ,  Susumu Yoshida

IPC分类号： G11B5/09

CPC分类号： G11B5/59627

摘要： According to one embodiment, a frequency control apparatus includes an eccentric component storage module, a frequency correction amount calculating module, and an oscillator control module. The eccentric component storage module stores in advance an eccentric component calculated by a discrete Fourier transform of the number of clock signals measured for each servo frame. The frequency correction amount calculating module calculates the number of clock signals corresponding to the servo frame based on the eccentric component stored in the eccentric component storage module and calculates a frequency correction amount corresponding to the servo frame based on the number of clock signals. The oscillator control module controls the operation of a frequency oscillator such that a frequency for oscillating a clock signal in the frequency oscillator is adjusted according to the frequency correction amount calculated by the frequency correction amount calculating module.

摘要翻译： 根据一个实施例，频率控制装置包括偏心分量存储模块，频率校正量计算模块和振荡器控制模块。 偏心部件存储模块预先存储通过对每个伺服帧测量的时钟信号的数量的离散傅里叶变换计算出的偏心分量。 频率校正量计算模块基于存储在偏心分量存储模块中的偏心分量来计算与伺服帧对应的时钟信号的数量，并且基于时钟信号的数量计算与伺服帧对应的频率校正量。 振荡器控制模块控制频率振荡器的操作，使得根据由频率校正量计算模块计算出的频率校正量来调整振荡频率振荡器中的时钟信号的频率。

公开(公告)号：US20060082918A1

公开(公告)日：2006-04-20

申请号：US11043492

申请日：2005-01-25

申请人： Tatsuhiko Kosugi ,  Masahide Kanegae

发明人： Tatsuhiko Kosugi ,  Masahide Kanegae

IPC分类号： G11B21/02 ,  G11B5/09 ,  G11B27/36

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。

公开(公告)号：US5592353A

公开(公告)日：1997-01-07

申请号：US343229

申请日：1994-11-22

申请人： Toru Shinohara ,  Tatsuhiko Kosugi

发明人： Toru Shinohara ,  Tatsuhiko Kosugi

IPC分类号： G06F1/26 ,  G05F1/00 ,  G05F1/10 ,  G06F1/30 ,  H02J1/00 ,  H02H3/00

CPC分类号： G06F1/305

摘要： A power supply system includes load circuits connected to a power source circuit through respective power lines. Each of the power lines is provided with a breaker element such as a FET that connects and disconnects the power line to and from the load circuit, and an overcurrent detection resistor for detecting an overcurrent in the load circuit. If an overcurrent is detected according to a signal from the overcurrent detection resistor, a short-circuit protection controller opens the breaker element to cut off the power line from the load circuit. A voltage monitor circuit monitors the voltage of the load circuit, and a control circuit controls the load circuit.

摘要翻译： 电源系统包括通过相应电力线连接到电源电路的负载电路。 每个电源线设置有断开元件，例如连接和断开负载电路的电力线的FET，以及用于检测负载电路中的过电流的过电流检测电阻。 如果根据来自过电流检测电阻器的信号检测到过电流，则短路保护控制器打开断路器元件以从负载电路切断电力线。 电压监视电路监视负载电路的电压，控制电路控制负载电路。

公开(公告)号：US5523900A

公开(公告)日：1996-06-04

申请号：US194663

申请日：1994-02-08

申请人： Tatsuhiko Kosugi ,  Shuichi Hashimoto ,  Toru Shinohara

发明人： Tatsuhiko Kosugi ,  Shuichi Hashimoto ,  Toru Shinohara

IPC分类号： G11B19/28 ,  G11B5/596 ,  G11B20/14 ,  G11B20/18 ,  G11B21/10

CPC分类号： G11B21/106 ,  G11B5/59616

摘要： A head position detecting method and apparatus for detecting a phase difference from servo data on a recording medium to detect the position of a head. This head position detecting method and apparatus detect the phase differences between the read pulse of the servo data read by the head and reference clocks, and average the phase differences to detect the head position. A training area having a timing signal recorded therein is provided before the servo data on the recording medium. A phase-lock loop circuit for generating reference clocks is synchronized with the timing signal to accurately detect the phase differences. An integrator is used to average the phase differences. This design ensures accurate detection of the head position even under fast seek. Further, a phase difference signal around a target cylinder is obtained by selecting the phase of the reference clock in accordance with the position of the target cylinder.

摘要翻译： 一种头位置检测方法和装置，用于检测与记录介质上的伺服数据的相位差以检测头的位置。 这种头部位置检测方法和装置检测由头部和参考时钟读取的伺服数据的读取脉冲之间的相位差，并且平均相位差以检测头部位置。 在记录介质上的伺服数据之前提供其中记录有定时信号的训练区域。 用于产生参考时钟的锁相环电路与定时信号同步，以准确地检测相位差。 积分器用于平均相位差。 这种设计确保即使在快速寻找下也能准确检测头部位置。 此外，通过根据目标气缸的位置选择参考时钟的相位来获得目标气缸周围的相位差信号。

公开(公告)号：US07742253B2

公开(公告)日：2010-06-22

申请号：US11975945

申请日：2007-10-23

申请人： Tatsuhiko Kosugi

发明人： Tatsuhiko Kosugi

IPC分类号： G11B21/02

CPC分类号： G11B5/59605 ,  G11B5/5547

摘要： A storage device and a control device include a first DSP, a second DSP, and a Servo MPU for controlling a position of a head with respect to a storage medium. The Servo MPU instructs the first DSP and the second DSP. The first DSP carries out calculation of at least any of a demodulation calculation that is a calculation relating to demodulation of servo information and a digital filter calculation based on the instruction from the Servo MPU. The first DSP carries out a correction calculation that is a calculation relating to correction of the position based on the instruction from the Servo MPU. The Servo MPU carries out control of the position based on a result of the calculation carried out by the first DSP and the second DSP.

摘要翻译： 存储装置和控制装置包括第一DSP，第二DSP和用于控制磁头相对于存储介质的位置的伺服MPU。 伺服MPU指示第一个DSP和第二个DSP。 第一DSP执行基于来自伺服MPU的指令的与伺服信息的解调和数字滤波器计算有关的计算的解调计算中的至少一个的计算。 第一DSP执行校正计算，其是基于来自伺服MPU的指令的与位置校正有关的计算。 伺服MPU基于由第一DSP和第二DSP进行的计算的结果来执行位置的控制。

公开(公告)号：US20100073807A1

公开(公告)日：2010-03-25

申请号：US12569593

申请日：2009-09-29

申请人： Tatsuhiko Kosugi

发明人： Tatsuhiko Kosugi

IPC分类号： G11B20/20

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。

公开(公告)号：US20090086598A1

公开(公告)日：2009-04-02

申请号：US12212310

申请日：2008-09-17

申请人： Tatsuhiko Kosugi

发明人： Tatsuhiko Kosugi

IPC分类号： G11B5/58

CPC分类号： G11B5/59655

摘要： One aspect of the embodiment utilizes a servo frame interval correction apparatus which includes a detection unit for detecting a first servo frame formed on said recording medium. The apparatus includes an acquiring unit acquiring a detection time interval between said first servo frame and a second servo frame detected subsequently to the first servo frame from a table storing a detection time interval between a specific servo frame and a servo frame detected subsequently to the specific servo frame. The apparatus includes a differential calculation unit calculating a differential between the detection time interval acquired by said acquiring unit and a reference time interval; and a correction unit correcting an estimated position of said second servo frame based on the differential calculated by said differential calculation unit.

摘要翻译： 本实施例的一个方面利用了伺服帧间隔校正装置，其包括用于检测形成在所述记录介质上的第一伺服帧的检测单元。 该装置包括获取单元，从存储特定伺服帧和随后特定伺服帧检测到的伺服帧之间的检测时间间隔的表中获取所述第一伺服帧和随后的第一伺服帧所检测的第二伺服帧之间的检测时间间隔 伺服框架 该装置包括：差分计算单元，计算由所述获取单元获取的检测时间间隔与参考时间间隔之间的差值; 以及校正单元，基于由所述差分计算单元计算的差分来校正所述第二伺服帧的估计位置。

公开(公告)号：US20080174903A1

公开(公告)日：2008-07-24

申请号：US11975945

申请日：2007-10-23

申请人： Tatsuhiko Kosugi

发明人： Tatsuhiko Kosugi

IPC分类号： G11B21/02

CPC分类号： G11B5/59605 ,  G11B5/5547

摘要： A storage device and a control device include a DSP 21, a DSP 22, and a Servo MPU 12 for controlling a position of a head with respect to a storage medium. The Servo MPU 12 instructs the DSP 21 and the DSP 22. The DSP 21 carries out calculation of at least any of a demodulation calculation that is a calculation relating to demodulation of servo information and a digital filter calculation based on the instruction from the Servo MPU 12. The DSP 22 carries out a correction calculation that is a calculation relating to correction of the position based on the instruction from the Servo MPU. The Servo MPU 12 carries out control of the position based on a result of the calculation carried out by the DSP 21 and the DSP 22.

摘要翻译： 存储装置和控制装置包括用于控制头相对于存储介质的位置的DSP 21，DSP 22和伺服MPU 12。 伺服MPU12指示DSP21和DSP22。 DSP21执行基于来自伺服MPU 12的指令的与伺服信息的解调和数字滤波器计算有关的计算的解调计算中的至少一个的计算。 DSP22进行基于来自伺服MPU的指示的与位置的校正有关的计算的校正计算。 伺服MPU12基于由DSP21和DSP22执行的计算结果来执行位置的控制。