公开(公告)号：US06236527B1

公开(公告)日：2001-05-22

申请号：US09103758

申请日：1998-06-24

申请人： Hiroshi Uchiike ,  Kenji Ogasawara ,  Yoshiro Amano ,  Masahiro Shimizu ,  Shusuke Kurihara ,  Kazunari Tsuchimto ,  Nobuyuki Kitazaki ,  Shinji Ueno ,  Isao Yoneda ,  Yuji Yokoe ,  Fuminori Sai

发明人： Hiroshi Uchiike ,  Kenji Ogasawara ,  Yoshiro Amano ,  Masahiro Shimizu ,  Shusuke Kurihara ,  Kazunari Tsuchimto ,  Nobuyuki Kitazaki ,  Shinji Ueno ,  Isao Yoneda ,  Yuji Yokoe ,  Fuminori Sai

IPC分类号： G11B2102

CPC分类号： G11B19/04 ,  G11B5/54 ,  G11B21/12

摘要： A disk drive with means to prevent accidental landing of a head/slider on the disk surface is described. In one embodiment a shock sensor is provided to sense external shocks received by the mechanism. During loading (positioning) of the actuator bearing the head/slider over the disk, if a shock is sensed, loading is stopped and an immediate unloading is performed to return the actuator to the withdrawn position. In another embodiment the unload operation is performed when the rotational speed of the disk is changed. In another embodiment the unload operation is performed when the rotational speed of the disk drops below a threshold. A circuit and method for detecting when the rotational speed of the disk drops below a threshold is also provided. The unloading in the various embodiments may be performed using velocity control or without velocity control.

摘要翻译： 描述了具有防止头/滑块在盘表面上意外着落的装置的磁盘驱动器。 在一个实施例中，提供了一种震动传感器来感测由机构接收的外部冲击。 在将头/滑块轴承到盘上的执行器的装载（定位）期间，如果感测到冲击，则停止加载，并立即执行卸载以将执行器返回到撤回位置。 在另一个实施例中，当盘的旋转速度改变时执行卸载操作。 在另一个实施例中，当盘的转速下降到阈值以下时，执行卸载操作。 还提供了一种用于检测盘的转速何时下降到阈值以下的电路和方法。 各种实施例中的卸载可以使用速度控制或无速度控制来执行。

公开(公告)号：US5923491A

公开(公告)日：1999-07-13

申请号：US681411

申请日：1996-07-22

申请人： Masashi Kisaka ,  Nobuyuki Kitazaki ,  Takashi Nakamura ,  Yuji Yokoe ,  Isao Yoneda

发明人： Masashi Kisaka ,  Nobuyuki Kitazaki ,  Takashi Nakamura ,  Yuji Yokoe ,  Isao Yoneda

IPC分类号： G11B5/596 ,  G11B21/10

CPC分类号： G11B21/106 ,  G11B5/59627 ,  G11B5/59633

摘要： The present invention determines whether a filter is used for reading and writing on a disk to correct repeatable runout. The invention estimates the magnitude of repeatable runout for each disk by measuring the maximum absolute value of a state variable of a filter when the disk is turned on or when the disk returns from a sleep mode, and compares the measured value to a predetermined criterion such as the track width. If the magnitude of the repeatable runout is less than or equal to the predetermined criterion, the filter is not used. If the magnitude of the repeatable runout exceeds the predetermined criterion, the invention reads and writes data using the filter.

摘要翻译： 本发明确定滤波器是否用于读取和写入磁盘以校正可重复的跳动。 本发明通过测量当盘被打开时或当盘从睡眠模式返回时的过滤器的状态变量的最大绝对值，来估计每个盘的可重复跳动的幅度，并将测量值与预定标准 作为轨道宽度。 如果可重复跳动的幅度小于或等于预定标准，则不使用滤波器。 如果可重复跳动的幅度超过预定标准，本发明使用滤波器读取和写入数据。

公开(公告)号：US6141173A

公开(公告)日：2000-10-31

申请号：US095506

申请日：1998-06-10

申请人： Nobuyuki Kitazaki ,  Yoshiro Amano ,  Kenjo Ogasawara ,  Shinji Ueno

发明人： Nobuyuki Kitazaki ,  Yoshiro Amano ,  Kenjo Ogasawara ,  Shinji Ueno

IPC分类号： G11B21/12 ,  G11B21/02

CPC分类号： G11B21/12

摘要： The present invention is an apparatus and method to reliably unload a head slider from a recording medium. Transistor Tr5 is on. If the main power supply Vdd is turned off at time t1, Tr1, Tr2, and D1 are turned off and the level of the control signal Ret becomes higher than the threshold voltage Vth of Tr3 and Tr4, turning on Tr3 and Tr4. C1 also starts to discharge. The control signal InRet changes to a "L"-level, and the control signal OutRet remains to be at the "L"-level. This allows the IR driver to feed a negative-polarity VCM current through the voice coil to preliminarily move the head arm in the direction opposite to the unload direction. Then, at time t2 when the level of Ret becomes equal to or lower than Vth, both InRet and OutRet change to a "H"-level, the IR driver becomes inoperative, and the OR driver feeds a positive-polarity VCM current through the voice coil to reverse the moving direction of the head arm.

摘要翻译： 本发明是一种从记录介质上可靠地卸载磁头滑块的装置和方法。 晶体管Tr5导通。 如果在时间t1断开主电源Vdd，则Tr1，Tr2和D1关闭，并且控制信号Ret的电平变得高于Tr3和Tr4的阈值电压Vth，打开Tr3和Tr4。 C1也开始放电。 控制信号InRet变为“L”级，控制信号OutRet保持为“L”级。 这允许IR驱动器通过音圈馈送负极性的VCM电流，以便在与卸载方向相反的方向上预先移动头臂。 然后，在Ret的电平等于或等于Vth的时刻t2，InRet和OutRet均变为“H”电平，IR驱动器变为不工作，OR驱动器通过该驱动器馈送正极性VCM电流 音圈反转头臂的移动方向。

公开(公告)号：US06515813B2

公开(公告)日：2003-02-04

申请号：US09764538

申请日：2001-01-17

申请人： Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Yutaka Ozawa ,  Isao Yoneda

发明人： Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Yutaka Ozawa ,  Isao Yoneda

IPC分类号： G11B509

CPC分类号： G11B5/59611 ,  G11B19/28 ,  G11B20/14

摘要： A method to enable servo information to be detected surely and stably even when a time interval between servo sectors is changed due to disk shifting. A time interval TS(i) is calculated according to an internal variable value, which is in proportion to a displacement &Dgr;r(i) of a servo area SF(i) in a radial direction of a subject disk (step S6). The displacement &Dgr;r(i) is calculated from already detected servo information[, thereby]. Thereby, a time interval for detecting servo information is adjusted according to the above described time interval TS(i) (steps S7 and S4). The time interval TS(i) is the time interval between passing of a servo sector in the servo area SF(i) under the head H and passing of a servo sector in the servo area SF(i+1) under the head H.

摘要翻译： 即使伺服扇区之间的时间间隔由于盘移动而改变，也能够确保和稳定地检测伺服信息。 时间间隔TS（i）根据内部变量值计算，该内部变量值与目标盘的径向方向上的伺服区域SF（i）的位移量DELTAr（i）成比例（步骤S6）。 从已经检测的伺服信息[由此]计算位移ΔTATA（i）。 由此，根据上述时间间隔TS（i）来调整用于检测伺服信息的时间间隔（步骤S7和S4）。 时间间隔TS（i）是在头部H下的伺服区域SF（i）中的伺服扇区通过之间的时间间隔，并且在头部H下的伺服区域SF（i + 1）中伺服扇区通过之间的时间间隔。

公开(公告)号：US06891692B2

公开(公告)日：2005-05-10

申请号：US10068602

申请日：2002-02-05

申请人： Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Masahiro Shimizu

发明人： Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Masahiro Shimizu

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

CPC分类号： G11B5/5547

摘要： A position control system for a magnetic head improves servo tracking characteristics in a low frequency range without impairing the stability of seek operations. The position control system is equipped with two integrators: a first integrator 43 and second integrator 45. The gain K3′ of the second integrator 45 is set larger than the gain K3 of the first integrator 43. The first integrator 43 plays the role of offsetting the bias force acting on the magnetic head while the second integrator 45 plays the role of improving the servo tracking characteristics in the low frequency range.

摘要翻译： 用于磁头的位置控制系统可以在低频范围内提高伺服跟踪特性，而不会影响寻道操作的稳定性。 位置控制系统配备有两个积分器：第一积分器43和第二积分器45.第二积分器45的增益K 3'被设置为大于第一积分器43的增益K 3。第一积分器43起作用 抵消作用在磁头上的偏压力，而第二积分器45起到提高低频范围内的伺服跟踪特性的作用。

公开(公告)号：US06344943B1

公开(公告)日：2002-02-05

申请号：US09280384

申请日：1999-03-29

申请人： Nobuyuki Kitazaki ,  Kiyoshi Satoh ,  Arun Sharma ,  Sri Muthuthamby Sri-Jayantha ,  Isao Yoneda

发明人： Nobuyuki Kitazaki ,  Kiyoshi Satoh ,  Arun Sharma ,  Sri Muthuthamby Sri-Jayantha ,  Isao Yoneda

IPC分类号： G11B5596

CPC分类号： G11B5/59605 ,  G11B5/59627 ,  G11B5/5965

摘要： A method and system for reducing positioning noise in a data storage system are provided. An access device is positioned over a data storage medium using a stream of bursts stored on the medium. The bursts are sensed at a frequency determined by the rate at which the medium is moved relative to a sensing device. Output positioning values are provided to position the access device at a frequency higher than the frequency at which the positioning bursts are sensed, and/or at random times. The random times may be calculated as random advances or delays from time points occurring at a fixed frequency.

摘要翻译： 提供了一种用于降低数据存储系统中定位噪声的方法和系统。 访问设备使用存储在介质上的突发流来定位在数据存储介质上。 以由介质相对于感测装置移动的速率确定的频率感测脉冲串。 提供输出定位值以将访问设备定位在高于感测定位脉冲串的频率的频率处和/或随机时间。 随机时间可以被计算为在固定频率发生的时间点的随机前进或延迟。

公开(公告)号：US06181507B2

公开(公告)日：2001-01-30

申请号：US08692164

申请日：1996-08-05

申请人： Nobuyuki Kitazaki ,  Kiyoshi Satoh ,  Arun Sharma ,  Sri Muthuthamby Sri-Jayantha ,  Isao Yoneda

发明人： Nobuyuki Kitazaki ,  Kiyoshi Satoh ,  Arun Sharma ,  Sri Muthuthamby Sri-Jayantha ,  Isao Yoneda

IPC分类号： G11B5596

CPC分类号： G11B5/59605 ,  G11B5/59627 ,  G11B5/5965

摘要： A method and system for reducing positioning noise in a data storage system are provided. An access device is positioned over a data storage medium using a stream of bursts stored on the medium. The bursts are sensed at a frequency determined by the rate at which the medium is moved relative to a sensing device. Output positioning values are provided to position the access device at a frequency higher than the frequency at which the positioning bursts are sensed, and/or at random times. The random times may be calculated as random advances or delays from time points occurring at a fixed frequency.

摘要翻译： 提供了一种用于降低数据存储系统中的定位噪声的方法和系统。 访问设备使用存储在介质上的突发流来定位在数据存储介质上。 以由介质相对于感测装置移动的速率确定的频率感测脉冲串。 提供输出定位值以将访问设备定位在高于感测定位脉冲串的频率的频率处和/或随机时间。 随机时间可以被计算为在固定频率发生的时间点的随机前进或延迟。

公开(公告)号：US06532129B1

公开(公告)日：2003-03-11

申请号：US09330180

申请日：1999-06-11

申请人： Sri Muthuthamby Sri-Jayantha ,  Hien P. Dang ,  Arun Sharma ,  Isao Yoneda ,  Nobuyuki Kitazaki

发明人： Sri Muthuthamby Sri-Jayantha ,  Hien P. Dang ,  Arun Sharma ,  Isao Yoneda ,  Nobuyuki Kitazaki

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A disk drive system, includes a head, a controller for controlling an operation of the head, at least one feedback filter coupled in relation to the controller, and a mechanism for keeping a function of the at least one of the feedback filter active during any of an absence of a valid position error signal (PES) and a position error signal being unavailable due to a defect during an operation of the head.

摘要翻译： 磁盘驱动器系统包括磁头，用于控制磁头的操作的控制器，相对于控制器耦合的至少一个反馈滤波器，以及用于保持反馈滤波器中的至少一个功能在任何 没有有效位置误差信号（PES）和位置误差信号由于在头部的操作期间的缺陷而不可用。

公开(公告)号：US07133237B2

公开(公告)日：2006-11-07

申请号：US10652477

申请日：2003-08-29

申请人： Masaomi Ikeda ,  Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Hirofumi Yanase

发明人： Masaomi Ikeda ,  Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Hirofumi Yanase

IPC分类号： G11B21/02

CPC分类号： G11B5/59666 ,  G11B5/59633

摘要： The read/write offset between the read head and write head is used to determine the head width ratio between the read head width and write head width. The servo information is written onto the magnetic disk in accordance with the APC value and track pitch that are derived from the determined head with ratio.

摘要翻译： 读头和写头之间的读/写偏移用于确定读头宽度和写头宽度之间的头宽比。 伺服信息根据从确定的磁头的比例导出的APC值和磁道间距写入磁盘。

公开(公告)号：US07054090B2

公开(公告)日：2006-05-30

申请号：US10601168

申请日：2003-06-19

申请人： Masaomi Ikeda ,  Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Atsushi Takeichi ,  Hirofumi Yanase

发明人： Masaomi Ikeda ,  Nobuyuki Kitazaki ,  Kenji Ogasawara ,  Atsushi Takeichi ,  Hirofumi Yanase

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B21/02

摘要： Disclosed is a data storage device to provide servo patterns of a track pitch individually consistent with head characteristics (writing width, and reading width) in a recording medium of a hard disk device. The data storage device is provided with a disk having pitch information indicating a track pitch recorded in a predetermined area, and a head for scanning the disk to read the TPI ID and reading/writing data from/in the disk by being subjected to seeking control based on the TPI ID. The TPI ID is recorded as a part of a servo pattern in a TPI ID embedded area provided in an outer periphery of a data area of the disk.

摘要翻译： 公开了一种数据存储装置，用于提供与硬盘装置的记录介质中的头部特性（写入宽度和读取宽度）独立一致的轨道间距的伺服模式。 数据存储装置设置有具有指示记录在预定区域中的轨道间距的音高信息的盘，以及用于扫描盘以读取TPI ID并通过进行寻道控制从盘读取/写入数据的头 基于TPI ID。 在设置在盘的数据区的外围的TPI ID嵌入区域中记录TPI ID作为伺服模式的一部分。