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59 条记录 (耗时 0.021 秒)

    Actuator control apparatus and magnetic disk unit
    3.
    发明授权
    Actuator control apparatus and magnetic disk unit 失效
    执行器控制装置和磁盘装置

    公开(公告)号：US06216050B1

    公开(公告)日：2001-04-10

    申请号：US09032218

    申请日：1998-02-27

    申请人： Hiroyuki Ono ,  Tetsuo Ueda

    发明人： Hiroyuki Ono ,  Tetsuo Ueda

    IPC分类号： G05B1101

    CPC分类号： G11B5/5534

    摘要： An actuator control system and a magnetic disk device having a hybrid control system. The actuator control system includes an LPF that can be processed by the hardware architecture of a HDD that does not include a state estimator. The actuator control system includes an actuator 10, a VCM driver circuit 11 for driving the actuator 10, an ADC 12 for converting the position signal from the actuator 10 into a digital position signal, an MPU 13 for generating the control signal to the actuator 10 in response to the digital position signal, a DAC 14 for converting the control signal into an analog control signal, and an LPF 15 coupled between DAC 14 and VCM driver circuit 11. The MPU 13 compensates the phase delay resulting from the LPF 15 by digital control. Additionally, the digital control reconstructs the state model of a plant including the LPF 15 to a state model requiring no state estimator.

    摘要翻译： 一种致动器控制系统和具有混合控制系统的磁盘装置。 致动器控制系统包括可以由不包括状态估计器的HDD的硬件架构处理的LPF。 执行器控制系统包括致动器10，用于驱动致动器10的VCM驱动器电路11，用于将来自致动器10的位置信号转换为数字位置信号的ADC 12，用于向致动器10产生控制信号的MPU 13 响应于数字位置信号，将用于将控制信号转换为模拟控制信号的DAC 14以及耦合在DAC 14和VCM驱动电路11之间的LPF 15构成。MPU 13通过数字式补偿由LPF15产生的相位延迟 控制。 此外，数字控制将包括LPF 15的工厂的状态模型重建为不需要状态估计器的状态模型。

    Magnetic disk drive and method for seek operations with reduced noise
    5.
    发明授权
    Magnetic disk drive and method for seek operations with reduced noise 有权
    磁盘驱动器和噪声减小的寻道操作方法

    公开(公告)号：US07271976B2

    公开(公告)日：2007-09-18

    申请号：US11265004

    申请日：2005-11-01

    申请人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    发明人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    IPC分类号： G11B21/02

    CPC分类号： G11B5/5547

    摘要： Embodiments of the invention reduce the noise occurring when the lubricating layer on the magnetic disk is smoothed. In one embodiment, a magnetic disk drive has a read/write mode parameter table for generating an electric current to be supplied to a voice coil motor when the magnetic head performs data read/write operations on the magnetic disk. The magnetic disk drive also has a smoothing mode parameter table for generating another electric current to be supplied to the voice coil motor when neither a data read nor a write operation is performed on the magnetic disk. The CPU refers to either the read/write mode parameter table or the smoothing mode parameter table and controls the electric current to be supplied to the voice coil motor. When a lubricating-layer smoothing event occurs, the CPU refers to the smoothing mode parameter table and after generating the associated electric current to be supplied to the voice coil motor, moves the magnetic head to seek between the outermost and innermost tracks on the surface of the magnetic disk to perform a smoothing process for the lubricating layer.

    摘要翻译： 本发明的实施例减少了当磁盘上的润滑层平滑时产生的噪声。 在一个实施例中，当磁头对磁盘执行数据读/写操作时，磁盘驱动器具有用于产生要提供给音圈电机的电流的读/写模式参数表。 磁盘驱动器还具有平滑模式参数表，用于当不对磁盘执行数据读取或写入操作时，产生要提供给音圈电机的另一电流。 CPU指的是读/写模式参数表或平滑模式参数表，并控制提供给音圈电机的电流。 当发生润滑层平滑事件时，CPU参考平滑模式参数表，并且在产生要提供给音圈电机的相关联的电流之后，移动磁头以在表面上的最外侧和最内侧的轨道之间寻找 该磁盘对润滑层进行平滑处理。

    Semiconductor laser
    6.
    发明授权
    Semiconductor laser 有权
    半导体激光器

    公开(公告)号：US07142576B2

    公开(公告)日：2006-11-28

    申请号：US11198089

    申请日：2005-08-05

    申请人： Tetsuo Ueda ,  Keiji Yamane ,  Isao Kidoguchi ,  Shoji Fujimori

    发明人： Tetsuo Ueda ,  Keiji Yamane ,  Isao Kidoguchi ,  Shoji Fujimori

    IPC分类号： H01S5/00

    CPC分类号： H01S5/028

    摘要： A semiconductor laser includes an active layer formed on a substrate and a pair of cladding layers sandwiching the active layer. On at least one of resonator end faces of the semiconductor laser, a first dielectric film with hydrogen added therein is provided. Between the first dielectric film and the resonator end face, a second dielectric film for suppressing the diffusion of hydrogen is provided. Even when a semiconductor laser with an end face coating film including a hydrogen-added film is exposed to high temperatures, peeling of the end face coating film and deterioration of the end face coating film can be suppressed.

    摘要翻译： 半导体激光器包括形成在基板上的有源层和夹着有源层的一对包覆层。 在半导体激光器的至少一个谐振器端面上，提供了其中添加有氢的第一电介质膜。 在第一电介质膜和谐振器端面之间，提供了用于抑制氢的扩散的第二电介质膜。 即使当具有包含加氢膜的端面涂膜的半导体激光器暴露于高温时，也可以抑制端面涂膜的剥离和端面涂膜的劣化。

    Magnetic disk drive and method for executing seek operation
    7.
    发明申请
    Magnetic disk drive and method for executing seek operation 有权
    磁盘驱动器和执行寻道操作的方法

    公开(公告)号：US20060092549A1

    公开(公告)日：2006-05-04

    申请号：US11265004

    申请日：2005-11-01

    申请人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    发明人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    IPC分类号： G11B21/02

    CPC分类号： G11B5/5547

    摘要： Embodiments of the invention reduce the noise occurring when the lubricating layer on the magnetic disk is smoothed. In one embodiment, a magnetic disk drive has a read/write mode parameter table for generating an electric current to be supplied to a voice coil motor when the magnetic head performs data read/write operations on the magnetic disk. The magnetic disk drive also has a smoothing mode parameter table for generating another electric current to be supplied to the voice coil motor when neither a data read nor a write operation is performed on the magnetic disk. The CPU refers to either the read/write mode parameter table or the smoothing mode parameter table and controls the electric current to be supplied to the voice coil motor. When a lubricating-layer smoothing event occurs, the CPU refers to the smoothing mode parameter table and after generating the associated electric current to be supplied to the voice coil motor, moves the magnetic head to seek between the outermost and innermost tracks on the surface of the magnetic disk to perform a smoothing process for the lubricating layer.

    摘要翻译： 本发明的实施例减少了当磁盘上的润滑层平滑时产生的噪声。 在一个实施例中，当磁头对磁盘执行数据读/写操作时，磁盘驱动器具有用于产生要提供给音圈电机的电流的读/写模式参数表。 磁盘驱动器还具有平滑模式参数表，用于当不对磁盘执行数据读取或写入操作时，产生要提供给音圈电机的另一电流。 CPU指的是读/写模式参数表或平滑模式参数表，并控制提供给音圈电机的电流。 当发生润滑层平滑事件时，CPU参考平滑模式参数表，并且在产生要提供给音圈电机的相关联的电流之后，移动磁头以在表面上的最外侧和最内侧轨迹之间寻找 该磁盘对润滑层进行平滑处理。

    Method and apparatus for detecting servo timing marks in a magnetic disk system
    10.
    发明授权
    Method and apparatus for detecting servo timing marks in a magnetic disk system 失效
    用于检测磁盘系统中的伺服定时标记的方法和装置

    公开(公告)号：US07675701B2

    公开(公告)日：2010-03-09

    申请号：US11600593

    申请日：2006-11-15

    申请人： Hideki Ohzeki ,  Noboru Yoshida ,  Kazuyuki Ishibashi ,  Tetsuo Ueda ,  Isao Yoneda ,  Toshiaki Wada

    发明人： Hideki Ohzeki ,  Noboru Yoshida ,  Kazuyuki Ishibashi ,  Tetsuo Ueda ,  Isao Yoneda ,  Toshiaki Wada

    IPC分类号： G11B5/09

    CPC分类号： G11B5/59688

    摘要： Detection capability of a servo timing mark (STM) is improved. Long STM is configured by pseudo-STM forming part of an AGC/PLL pattern and intrinsic STM. When a system can not recognize the intrinsic STM, it keeps a state that a sector detection window is opened, and is operated in a long STM detection mode to recognize the long STM, thereby generates an STM detection signal. After the STM detection signal has been generated, an STM detection window is closed, and the system is operated in an intrinsic STM detection mode. Since the long STM has longer bit length than the intrinsic STM, it has high discriminating power with respect to other bit patterns. Therefore, even if the sector detection window is remained to be in an opened state, bit strings of data sector, address information in a servo sector or the like is not falsely recognized.

    摘要翻译： 提高伺服定时标志（STM）的检测能力。 长STM由构成AGC / PLL模式和固有STM的一部分的伪STM构成。 当系统不能识别本征STM时，它保持扇区检测窗口打开的状态，并且以长STM检测模式操作以识别长STM，从而生成STM检测信号。 在产生STM检测信号之后，关闭STM检测窗口，并以本征STM检测模式操作系统。 由于长的STM具有比固有的STM更长的位长度，所以它对于其他位模式具有很高的识别能力。 因此，即使扇区检测窗口保持为打开状态，也不会错误地识别数据扇区的位串，伺服扇区中的地址信息等。