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13 条记录 (耗时 0.012 秒)

    Offset compensator and optical disc drive using the same
    1.
    发明公开
    Offset compensator and optical disc drive using the same 有权
    偏移补偿器和光盘驱动器，使得

    公开(公告)号：EP2061031A3

    公开(公告)日：2012-10-10

    申请号：EP08019953.2

    申请日：2008-11-14

    申请人： Hitachi Ltd. ,  Hitachi-LG Data Storage, Inc.

    发明人： Kikugawa, Atsushi

    IPC分类号： G11B20/10 ,  G11B7/005

    CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B20/10037 ,  G11B20/10203 ,  G11B20/10425 ,  G11B20/1403 ,  G11B2007/0013 ,  G11B2020/1457

    摘要： The generation of a pseudo-lock is prevented in a JFB offset compensator whose use has been conventionally limited due to a tendency to generate the pseudo-lock, and performance degradation of a PLL and a Viterbi decoder is suppressed. A means for monitoring an offset of a read signal is provided independently from the JFB offset compensator. With this configuration, the generation or a possibility of the generation of the pseudo-lock can be detected to reset an integrator. In order to reduce the influence of a large sporadic offset triggering the pseudo-lock, there may also be provided a limitter for limiting the absolute value of an offset signal inputted to the integrator or a limitter for limiting the absolute value of an offset compensation signal.

    Offset compensator and optical disc drive using the same
    3.
    发明公开
    Offset compensator and optical disc drive using the same 有权
    Offset-Kompensator und optisches Plattenlaufwerk damit

    公开(公告)号：EP2061031A2

    公开(公告)日：2009-05-20

    申请号：EP08019953.2

    申请日：2008-11-14

    申请人： Hitachi Ltd. ,  Hitachi-LG Data Storage, Inc.

    发明人： Kikugawa, Atsushi

    IPC分类号： G11B20/10 ,  G11B20/14

    CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B20/10037 ,  G11B20/10203 ,  G11B20/10425 ,  G11B20/1403 ,  G11B2007/0013 ,  G11B2020/1457

    摘要： The generation of a pseudo-lock is prevented in a JFB offset compensator whose use has been conventionally limited due to a tendency to generate the pseudo-lock, and performance degradation of a PLL and a Viterbi decoder is suppressed. A means for monitoring an offset of a read signal is provided independently from the JFB offset compensator. With this configuration, the generation or a possibility of the generation of the pseudo-lock can be detected to reset an integrator. In order to reduce the influence of a large sporadic offset triggering the pseudo-lock, there may also be provided a limitter for limiting the absolute value of an offset signal inputted to the integrator or a limitter for limiting the absolute value of an offset compensation signal.

    摘要翻译： 在由于产生伪锁定的趋势而通常限制其使用的JFB偏移补偿器中，防止生成伪锁定，并且抑制了PLL和维特比解码器的性能劣化。 独立于JFB偏移补偿器提供用于监视读取信号的偏移的装置。 利用这种配置，可以检测到生成伪锁定的可能性或复位积分器。 为了减少触发伪锁定的大量零星偏移的影响，还可以提供限制输入到积分器的偏移信号的绝对值或用于限制偏移补偿信号的绝对值的限幅器 。

    Surface observing apparatus and method
    6.
    发明公开
    Surface observing apparatus and method 失效
    Verfahren und Vorrichtung zum Beobachten einerFläche。

    公开(公告)号：EP0551814A1

    公开(公告)日：1993-07-21

    申请号：EP93100055.8

    申请日：1993-01-05

    申请人： HITACHI, LTD.

    发明人： Hosaka, Sumio ,  Kikugawa, Atsushi ,  Honda, Yukio ,  Koyanagi, Hajime ,  Hosoki, Shigeyuki ,  Hasegawa, Tsuyoshi

    IPC分类号： G01B7/34 ,  G01N27/00

    CPC分类号： G01Q20/02 ,  G01Q60/02 ,  G01Q60/08 ,  G01Q60/26 ,  G01Q60/32 ,  G11B5/00 ,  G11B9/1409 ,  G11B11/007 ,  G11B2005/0002 ,  G11B2005/0005 ,  Y10S977/849 ,  Y10S977/851 ,  Y10S977/852 ,  Y10S977/873 ,  Y10S977/953

    摘要： A surface observing apparatus for obtaining information of a specimen comprises a probe (17) disposed in the close vicinity of the specimen (2), a deformable cantilever (1) for holding the probe (17), a scanning mechanism for scanning a surface of the specimen with the probe (17), and detectors (3, 4, 5) for detecting displacements of the cantilever (1) to thereby allow information of the specimen to be derived on the basis of the displacement of the cantilever (1). The apparatus further comprise a first detector (9) for detecting a force acting on the probe from the displacement of the cantilever, and a second detector (7) for measuring a change in the force acting on the probe on the basis of the displacement of the cantilever.

    摘要翻译： 用于获取样本信息的表面观察装置包括设置在样本（2）附近的探针（17），用于保持探针（17）的可变形悬臂（1），用于扫描探针 具有探针（17）的样本和用于检测悬臂（1）的位移的检测器（3,4,5），从而允许基于悬臂（1）的位移导出样本的信息。 所述装置还包括第一检测器（9），用于根据所述悬臂的位移检测作用在所述探头上的力;以及第二检测器（7），用于根据所述悬臂的位移来测量作用在所述探针上的力的变化 悬臂。

    High-speed optical disk drive
    7.
    发明公开
    High-speed optical disk drive 有权
    Optisches Hochgeschwindigkeitsplattenlaufwerk

    公开(公告)号：EP2088593A1

    公开(公告)日：2009-08-12

    申请号：EP09001241.0

    申请日：2009-01-29

    申请人： Hitachi Ltd. ,  Hitachi-LG Data Storage, Inc.

    发明人： Kikugawa, Atsushi

    IPC分类号： G11B7/125

    CPC分类号： G11B20/10046 ,  G11B7/126 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/10425 ,  G11B20/10481 ,  G11B2220/2541

    摘要： The invention relates to a high-speed optical disk drive.
    If the read speed is increased while the high-frequency modulated carrier is fixed at a constant frequency, it becomes difficult to separate the read signal from the carrier by using bandwidth limitation of the analog system because the upper limit of the read signal band nears to the carrier frequency. Moreover, if the separation between them is eased by raising the carrier frequency, a problem that write-waveform controls become difficult arises. However, the carrier amplitude can be suppressed simultaneously preventing leakage to the read signal band by converting the carrier frequency into the stop-band of the adaptive equalizer by making the use of aliasing that occurs at the A/D conversion.

    摘要翻译： 本发明涉及一种高速光盘驱动器。 如果在高频调制载波固定为恒定频率的情况下增加读取速度，则由于读取信号频带的上限接近于模拟系统的带宽限制，难以将读取信号与载波分开 载波频率。 此外，如果通过提高载波频率来缓解它们之间的间隔，则会产生写波形控制变得困难的问题。 然而，通过使用在A / D转换时发生的混叠，能够同时抑制载波振幅，从而将载波频率转换成自适应均衡器的阻带，从而泄漏到读取信号频带。

    Scanning probe microscope and method of control error correction
    9.
    发明公开
    Scanning probe microscope and method of control error correction 失效
    Rasterabtastmikroskop und Verfahren zum Steuerfehlerkorrektur。

    公开(公告)号：EP0596494A2

    公开(公告)日：1994-05-11

    申请号：EP93117906.3

    申请日：1993-11-04

    申请人： HITACHI, LTD. ,  HITACHI CONSTRUCTION MACHINERY CO., LTD.

    发明人： Hosaka, Sumio ,  Kikugawa, Atsushi ,  Honda, Yukio ,  Koyanagi, Hajime ,  Nagasawa, Kiyosi

    IPC分类号： G01N27/00 ,  G01B7/34

    CPC分类号： G01Q70/04 ,  G01Q30/06 ,  Y10S977/849 ,  Y10S977/85 ,  Y10S977/86 ,  Y10S977/868 ,  Y10S977/87 ,  Y10S977/872 ,  Y10S977/873

    摘要： A scanning probe microscope in which the deflection of a cantilever (1, 104) caused by the proximity between a stylus (17, 109) and a sample (2) is detected, the relative distance between the sample and a probe at which the level of the deflection detection signal coincides with a reference level is subjected to servo control thereby to control the force exerted on the stylus to a constant level, and the relative positions of the sample and the probe are scanned to produce a three-dimensional image of the surface of the sample. In order to eliminate the error of servo control attributable to the deformation of the cantilever, the deflection detection signal is held with the cantilever set in free standing state, and the signal thus held is used to correct the level of the cantilever deflection detection signal. The servo control is effected by the detection signal thus corrected.

    摘要翻译： 一种扫描探针显微镜，其中检测由触针（17,109）和样品（2）之间的接近度引起的悬臂（1,104）的偏转，所述样品与所述探针之间的相对距离 与参考水平重合的偏转检测信号经受伺服控制，从而将施加在触针上的力控制到一定水平，扫描样品和探针的相对位置，以产生三维图像 样品表面。 为了消除由于悬臂变形引起的伺服控制的误差，偏转检测信号由悬臂设定为独立状态而被保持的信号用于校正悬臂偏转检测信号的电平。 伺服控制由如此校正的检测信号来实现。