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58 条记录 (耗时 0.027 秒)

    Circular polarized wave reception antenna
    1.
    发明授权
    Circular polarized wave reception antenna 有权
    圆极化波接收天线

    公开(公告)号：US06906683B2

    公开(公告)日：2005-06-14

    申请号：US10634385

    申请日：2003-08-04

    申请人： Masakazu Ikeda ,  Hisamatsu Nakano ,  Akira Miyoshi

    发明人： Masakazu Ikeda ,  Hisamatsu Nakano ,  Akira Miyoshi

    IPC分类号： H01Q19/10 ,  H01Q1/36 ,  H01Q9/30 ,  H01Q9/32

    CPC分类号： H01Q9/32

    摘要： A circular polarized wave reception antenna has a monopole antenna having a pole portion and an ground plate for grounding one terminal of the pole portion and a polarization converting arrangement disposed around the monopole antenna. The polarization converting arrangement has a plurality of helical leads extending in a helical fashion along the pole portion with apart from the pole portion by a predetermined distance. Each of the helical leads has an end grounded in said ground plate. The helical leads are disposed at equal angular spaces around the pole portion. When a resonance wavelength λ is equal to 128.3 mm, the predetermined space is equal to 20 mm. Each helical lead has a length of λ/4. A pitch angle included between the ground plate and each helical lead is equal to 40 degrees.

    摘要翻译： 圆极化波接收天线具有具有极部的单极天线和用于使极部的一个端子接地的接地板和设置在单极天线周围的偏振转换装置。 偏振转换装置具有多个螺旋引线，螺旋引线沿着极部分以螺旋方式延伸，与极部分离预定距离。 每个螺旋引线的端部接地在所述接地板中。 螺旋引线设置在极部周围相等的角度空间。 当共振波长λ等于128.3mm时，预定空间等于20mm。 每个螺旋引线的长度为λ/ 4。 接地板和每个螺旋引线之间的俯仰角等于40度。

    OPTICAL DISK REPRODUCING DEVICE AND PHASE-LOCKED LOOP CIRCUIT
    4.
    发明申请
    OPTICAL DISK REPRODUCING DEVICE AND PHASE-LOCKED LOOP CIRCUIT 审中-公开
    光盘再现设备和相位锁定环路

    公开(公告)号：US20120201111A1

    公开(公告)日：2012-08-09

    申请号：US13447975

    申请日：2012-04-16

    申请人： Yusuke Nakamura ,  Masakazu Ikeda ,  Koichiro Nishimura

    发明人： Yusuke Nakamura ,  Masakazu Ikeda ,  Koichiro Nishimura

    IPC分类号： G11B27/36 ,  G11B7/00

    CPC分类号： G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/10425 ,  G11B20/14 ,  G11B20/22 ,  G11B2220/2537

    摘要： An optical disk reproducing device for controlling false detection of synchronization signals due to intersymbol interference, and stably improving accuracy of frequency acquisition of a phase locked loop (PLL) even when offset and so on occur. A signal width close to an original mark length is obtained to use for frequency acquisition of the PLL by, for example, using two different slice thresholds and taking a width between a rising of a result of slicing at one threshold and a falling of a result of slicing at the other threshold as a synchronization signal width. When asymmetric properties due to offset, asymmetry, etc. occur, an amount of corrections on the slice threshold is calculated, and it is reflected on a threshold previously set to always obtain a correct synchronization signal width.

    摘要翻译： 一种用于控制由于符号间干扰导致的同步信号的错误检测的光盘再现装置，并且即使发生偏移等也能稳定地提高锁相环（PLL）的频率获取的精度。 获得接近原始标记长度的信号宽度，以便通过例如使用两个不同的切片阈值并且在一个阈值的切片结果的上升与结果的下降之间的宽度来使用PLL的频率采集 在另一阈值处切片为同步信号宽度。 当发生由于偏移，不对称等引起的不对称性质时，计算切片阈值上的校正量，并将其反映在预先设定为始终获得正确的同步信号宽度的阈值上。

    OPTICAL DISK REPRODUCING APPARATUS
    5.
    发明申请
    OPTICAL DISK REPRODUCING APPARATUS 有权
    光盘再现设备

    公开(公告)号：US20110228662A1

    公开(公告)日：2011-09-22

    申请号：US13150758

    申请日：2011-06-01

    申请人： Yusuke NAKAMURA ,  Masakazu Ikeda

    发明人： Yusuke NAKAMURA ,  Masakazu Ikeda

    IPC分类号： G11B20/10

    CPC分类号： G11B7/005 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10111 ,  G11B20/1012 ,  G11B20/10212 ,  G11B20/1496 ,  G11B2220/213 ,  G11B2220/2579

    摘要： The present invention relates to an optical disk reproducing apparatus, and provides a technology capable of supporting even a situation in which a reproduction signal characteristic is changed due to a factor other than recording density of an optical disk by using PRML of different constrained length and capable of improving reading accuracy. The optical disk reproducing apparatus includes a PRML circuit of first constrained length (for example, 4) and a PRML circuit of second constrained length (for example, 5). Equalization error values obtained during calculation of equalization learning in respective circuits are compared with each other in a determination circuit. Switching control of a switch is performed so that an output of one of the PRML circuits having a smaller equalization error value is selected.

    摘要翻译： 光盘重放装置技术领域本发明涉及光盘重放装置，并且提供了一种能够通过使用不同约束长度的PRML而能够支持再现信号特性由于光盘的记录密度而不是由记录密度而变化的情况的技术 提高阅读精度。 光盘再现装置包括第一约束长度（例如4）的PRML电路和第二约束长度的PRML电路（例如5）。 在各个电路中的均衡学习计算中获得的均衡误差值在确定电路中彼此进行比较。 执行开关的开关控制，使得选择具有较小均衡误差值的PRML电路之一的输出。

    Thermal spray material and and thermal sprayed member using the same
    7.
    发明授权
    Thermal spray material and and thermal sprayed member using the same 失效
    热喷涂材料和使用其的热喷涂构件

    公开(公告)号：US5032557A

    公开(公告)日：1991-07-16

    申请号：US547696

    申请日：1990-07-02

    申请人： Hatsuo Taira ,  Masakazu Ikeda ,  Yoshio Harada ,  Hiroshi Hagiwara

    发明人： Hatsuo Taira ,  Masakazu Ikeda ,  Yoshio Harada ,  Hiroshi Hagiwara

    IPC分类号： C04B35/22 ,  C23C4/10

    CPC分类号： C04B35/22 ,  C23C4/11 ,  Y10T428/12618

    摘要： The present invention relates to a novel thermal spray material in any one of the forms of a particle mixture material, a granule material, and an electric fused material of 2CaO.multidot.SiO.sub.2 and CaO.multidot.ZrO.sub.2. As 2CaO.multidot.O.multidot.SiO.sub.2, .gamma.-2CaO.multidot.SiO.sub.2 is used. The ratio of .gamma.-2CaO.multidot.SiO.sub.2 to CaO.multidot.ZrO.sub.2 is specified by weight %. This invention relates also to a thermal sprayed member formed by thermal spraying this thermal spray material on a thermal resistant substrate.

    摘要翻译： 本发明涉及一种以2CaOxSiO2和CaOxZrO2的颗粒混合材料，颗粒材料和电熔体材料的任何一种形式的新型热喷涂材料。 作为2CaOxOxSiO2，使用γ-2CaOxSiO2。 γ-CaOxSiO 2与CaO x ZrO 2的比例以重量％表示。 本发明还涉及通过将该热喷涂材料热喷涂在耐热基材上形成的热喷涂部件。

    Semiconductor device, write strategy generating method, and write strategy generating program
    9.
    发明授权
    Semiconductor device, write strategy generating method, and write strategy generating program 有权
    半导体器件，写策略生成方法和写策略生成程序

    公开(公告)号：US08681591B2

    公开(公告)日：2014-03-25

    申请号：US13410052

    申请日：2012-03-01

    申请人： Atsushi Neo ,  Yasuo Mutsuro ,  Masakazu Ikeda ,  Junichi Tanjima

    发明人： Atsushi Neo ,  Yasuo Mutsuro ,  Masakazu Ikeda ,  Junichi Tanjima

    IPC分类号： G11B7/0045

    CPC分类号： G11B7/00456 ,  G11B7/00458 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/10398 ,  G11B20/10407 ,  G11B20/10481 ,  G11B20/225 ,  G11B2220/2537

    摘要： A semiconductor device mounted in an optical disk apparatus controls writing and reading of data in and from an optical disk. The device performs first processing for adjusting a write strategy in such a manner that based on error information corresponding to a shift in the phase of a reproduction signal with respect to a channel clock signal for data reproduction, which is generated based on the reproduction signal read from the optical disk, the value of the error information related to a plurality of recording marks to be evaluated becomes minimum as a whole. The device also performs second processing for adjusting a write strategy in such a manner that the value of the error information related to a desired recording mark becomes small.

    摘要翻译： 安装在光盘装置中的半导体装置控制从光盘读出数据的数据。 该装置执行用于调整写入策略的第一处理，使得基于与基于再现信号读取生成的数据再现的通道时钟信号相对应的再现信号的相位移相对应的误差信息 从光盘开始，要评估的多个记录标记相关的错误信息的值整体上变得最小。 该装置还执行用于调整写入策略的第二处理，使得与所需记录标记相关的错误信息的值变小。