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72 条记录 (耗时 0.025 秒)

    Pump light source for raman amplification
    1.
    发明授权
    Pump light source for raman amplification 有权
    泵浦光源用于拉曼放大

    公开(公告)号：US06966704B2

    公开(公告)日：2005-11-22

    申请号：US10098129

    申请日：2002-03-15

    申请人： Masami Ikeda ,  Shigeyuki Furuta ,  Koichi Murata

    发明人： Masami Ikeda ,  Shigeyuki Furuta ,  Koichi Murata

    IPC分类号： H01S3/0941 ,  H01S5/022 ,  H01S5/40 ,  G02B6/36

    CPC分类号： H01S5/4025 ,  H01S3/09415 ,  H01S5/02248 ,  H01S5/0683

    摘要： A pump light source for Raman amplification. The pump light source includes a fixed module with at least one laser diode module, an electronic device for driving and controlling the laser diode module and a photodiode for monitoring optical output in the at least one laser diode. The pump light source also includes an additional module which contains a prescribed number of module cards. Each of the module cards are removably connected to the fixed module.

    摘要翻译： 用于拉曼放大的泵浦光源。 泵浦光源包括具有至少一个激光二极管模块的固定模块，用于驱动和控制激光二极管模块的电子装置和用于监测至少一个激光二极管中的光输出的光电二极管。 泵浦光源还包括一个包含规定数量的模块卡的附加模块。 每个模块卡可拆卸地连接到固定模块。

    Current-switching cell and digital-to-analog converter
    3.
    发明授权
    Current-switching cell and digital-to-analog converter 有权
    电流开关单元和数模转换器

    公开(公告)号：US08493257B2

    公开(公告)日：2013-07-23

    申请号：US13145782

    申请日：2010-01-28

    申请人： Munehiko Nagatani ,  Hideyuki Nosaka ,  Shogo Yamanaka ,  Kimikazu Sano ,  Koichi Murata

    发明人： Munehiko Nagatani ,  Hideyuki Nosaka ,  Shogo Yamanaka ,  Kimikazu Sano ,  Koichi Murata

    IPC分类号： H03M1/66

    CPC分类号： H03M1/662 ,  H03M1/742

    摘要： Two D flip-flops (D-FFMA, D-FFMB) output two half-rate signals (DMR-A, DMR-B) by dividing a digital input signal (DM) into two signals and retiming them based on a clock signal (CLK) and a negative-phase clock signal (CLKB). First and second switches (SM1, SM2) are driven by the two half-rate signals (DMR-A, DMR-B). Third and fourth switches (SM3, SM4) are driven by a select signal SW and a negative-phase select signal SWB that have the same frequency as that of the clock signal (CLK) but a different phase from that of the clock signal (CLK). The current supplied from a current source (1) to a load (4) thus becomes a current signal corresponding to a conversion frequency twice the frequency of the clock signal (CLK).

    摘要翻译： 两个D触发器（D-FFMA，D-FFMB）通过将数字输入信号（DM）分成两个信号并基于时钟信号重新定时（DMR-A，D-FFMB）输出两个半速率信号 CLK）和负相位时钟信号（CLKB）。 第一和第二开关（SM1，SM2）由两个半速率信号（DMR-A，DMR-B）驱动。 第三和第四开关（SM3，SM4）由与时钟信号（CLK）频率相同的频率的选择信号SW和负相位选择信号SWB驱动，但与时钟信号（CLK ）。 因此，从电流源（1）提供给负载（4）的电流成为与时钟信号（CLK）的频率的两倍的转换频率相对应的电流信号。

    Phase plate and optical head device
    4.
    发明授权
    Phase plate and optical head device 有权
    相位板和光头装置

    公开(公告)号：US07782738B2

    公开(公告)日：2010-08-24

    申请号：US11874547

    申请日：2007-10-18

    申请人： Toshimasa Kakiuchi ,  Koichi Murata

    发明人： Toshimasa Kakiuchi ,  Koichi Murata

    IPC分类号： G11B7/00

    CPC分类号： G02B5/3083 ,  G02B27/288 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1381 ,  G11B2007/0006

    摘要： A phase plate and an optical head device are provided, which are capable of suppressing changes of the amount of light incident on a light-receiving unit even if the phase difference caused by transmission through a protective layer of an optical recording medium differs depending on the type of optical recording medium.The phase plate includes a birefringent medium and produces a phase difference in linearly polarized light incident on the phase plate between a polarization component having a polarization direction parallel to the optic axis of the birefringent medium and a polarization component having a polarization direction perpendicular to the optic axis. In the phase plate, the birefringent medium includes a plurality of types of phase areas disposed adjacently; at least two types of adjacent phase areas are different from each other in phase differences, optic axes, or both phase differences and optic axes; and each of the plurality of types of phase areas is disposed so as to have two-fold rotational symmetry with respect to the optical axis of the phase plate.

    摘要翻译： 提供一种相位板和光学头装置，其能够抑制入射在光接收单元上的光量的变化，即使由于通过光记录介质的保护层的透射引起的相位差根据 类型的光记录介质。 相位板包括双折射介质，并且在具有平行于双折射介质的光轴的偏振方向的偏振分量和具有垂直于光学元件的偏振方向的偏振分量之间产生入射在相位板上的线偏振光的相位差 轴。 在相位板中，双折射介质包括相邻设置的多个相位区域; 至少两种类型的相邻区域在相位差，光轴或相位差和光轴两者中彼此不同; 并且多个类型的相位区域中的每一个被设置成相对于相位板的光轴具有双重旋转对称。

    Perfluoropolyether derivative
    6.
    发明申请
    Perfluoropolyether derivative 失效
    全氟聚醚衍生物

    公开(公告)号：US20050197408A1

    公开(公告)日：2005-09-08

    申请号：US11107980

    申请日：2005-04-18

    申请人： Daisuke Shirakawa ,  Takashi Okazoe ,  Kazuya Oharu ,  Shu-zhong Wang ,  Koichi Murata ,  Kengo Kawahara

    发明人： Daisuke Shirakawa ,  Takashi Okazoe ,  Kazuya Oharu ,  Shu-zhong Wang ,  Koichi Murata ,  Kengo Kawahara

    IPC分类号： A61K31/08 ,  C08G65/00 ,  C10M107/38

    CPC分类号： C08G65/007 ,  C10M107/38 ,  C10M2213/043 ,  C10M2213/0606 ,  C10N2240/204

    摘要： A novel perfluoropolyether derivative which is less likely to undergo decomposition, which is free from a problem of deterioration during its use, and which is useful as a lubricating oil or a coating agent, is provided. A compound represented by the following formula (1): HO—(CH2CH2O)r.(CH2CH (OH)CH2O)p—CH2CF2O(CF2CF2O)mCF2CH2O——(CH2CH(OH)CH2O)q.(CH2CH2O)s—H  Formula (1) wherein m represents an integer of from 3 to 200, and each of p, q, r and s which are independent of one another, represents an integer of from 0 to 100, provided that when each of p, q, r and s which are independent of one another, is an integer of at least 1, the arrangement of —(CH2CH2O)— and —(CH2CH(OH)CH2O)— units is not particularly limited, and when one of r and p is an integer of at least 2 and the other is an integer of at least 1, or when one of q and s is an integer of at least 2 and the other is an integer of at least 1, these units may be arranged in a block form or at random.

    摘要翻译： 提供了一种不太可能分解的新型全氟聚醚衍生物，其在使用中没有劣化的问题，并且其可用作润滑油或涂层剂。 由下式（1）表示的化合物：<？in-line-formula description =“In-line formula”end =“lead”？> HO-（CH 2 CH 2 （CH 2 CH（OH）CH 2 O）CH 2 CH（OH）CH 2 CH 2 2 CF 2 O 2（CF 2 CF 2 O）CF 2 O（CF 2 O 2 CF 2） 2 CH 2 - （CH 2 CH（OH）CH 2 O）q 其中m表示3〜200的整数，p，q，r和s彼此独立地表示0〜100的整数，条件是每当 彼此独立的p，q，r和s的整数为至少1的整数， - （CH 2 CH 2 CH 2 O）的排列 - 和 - （CH 2 CH（OH）CH 2 O） - 单元没有特别限制，当r和p中的一个为至少2的整数，另一个为 是至少为1的整数，或者q和s之一的整数 是至少为2的整数，另一个是至少为1的整数，这些单元可以以块形式或随机排列。

    Automatic gain control circuit
    9.
    发明授权
    Automatic gain control circuit 有权
    自动增益控制电路

    公开(公告)号：US09143110B2

    公开(公告)日：2015-09-22

    申请号：US14114519

    申请日：2012-06-29

    申请人： Kimikazu Sano ,  Hiroyuki Fukuyama ,  Makoto Nakamura ,  Hideyuki Nosaka ,  Miwa Mutoh ,  Koichi Murata

    发明人： Kimikazu Sano ,  Hiroyuki Fukuyama ,  Makoto Nakamura ,  Hideyuki Nosaka ,  Miwa Mutoh ,  Koichi Murata

    IPC分类号： H03G3/10 ,  H03F1/08 ,  H03G3/30

    CPC分类号： H03G3/30 ,  H03G3/3084

    摘要： An automatic gain control circuit (5a) includes a peak detector circuit (10) that detects the peak voltage of the output signal from a variable gain amplifier (3), an average value detection and output amplitude setting circuit (11) that detects the average voltage of the output signals from the variable gain amplifier (3) and adds a voltage ½ the desired output amplitude of the variable gain amplifier (3) to the average voltage, and a high gain amplifier (12) that amplifies the difference between the output voltage of the peak detector circuit (10) and the output voltage of the average value detection and output amplitude setting circuit (11) and controls the gain of the variable gain amplifier (3) using the amplification result as a gain control signal. The peak detector circuit (10) includes transistors (Q1, Q2, Q3), a current source (I1), and a filter circuit. The filter circuit includes a series connection of a resistor (Ra) and a capacitor (C1).

    摘要翻译： 自动增益控制电路（5a）包括检测来自可变增益放大器（3）的输出信号的峰值电压的峰值检测电路（10），检测平均值的平均值检测和输出幅度设定电路（11） 来自可变增益放大器（3）的输出信号的电压，并将可变增益放大器（3）的期望输出幅度的电压½加到平均电压上;以及高增益放大器（12），放大输出 峰值检测器电路（10）的电压和平均值检测和输出幅度设置电路（11）的输出电压，并且使用放大结果来控制可变增益放大器（3）的增益作为增益控制信号。 峰值检测器电路（10）包括晶体管（Q1，Q2，Q3），电流源（I1）和滤波器电路。 滤波电路包括电阻（Ra）和电容器（C1）的串联连接。

    Vector sum phase shifter, optical transceiver, and control circuit
    10.
    发明授权
    Vector sum phase shifter, optical transceiver, and control circuit 有权
    矢量和移相器，光收发器和控制电路

    公开(公告)号：US08687968B2

    公开(公告)日：2014-04-01

    申请号：US13059226

    申请日：2009-08-12

    申请人： Hideyuki Nosaka ,  Munehiko Nagatani ,  Shogo Yamanaka ,  Kimikazu Sano ,  Koichi Murata ,  Kiyomitsu Onodera ,  Takatomo Enoki

    发明人： Hideyuki Nosaka ,  Munehiko Nagatani ,  Shogo Yamanaka ,  Kimikazu Sano ,  Koichi Murata ,  Kiyomitsu Onodera ,  Takatomo Enoki

    IPC分类号： H04B10/00

    CPC分类号： H03H11/20 ,  H03H2007/0192 ,  H03H2011/0494 ,  H04B10/505 ,  H04B2210/517

    摘要： A vector sum phase shifter includes a 90° phase shifter (1) which generates an in-phase signal (VINI) and a quadrature signal (VINQ) from an input signal (VIN), a four-quadrant multiplier (2I) which changes the amplitude of the in-phase signal (VINI) based on a control signal (CI), a four-quadrant multiplier (2Q) which changes the amplitude of the quadrature signal (VINQ) based on a control signal (CQ), a combiner (3) which combines the in-phase signal (VINI) and the quadrature signal (VINQ), and a control circuit (4). The control circuit (4) includes a voltage generator which generates a reference voltage, and a differential amplifier which outputs the difference signal between a control voltage (VC) and the reference voltage as the control signal (CI, CQ). The differential amplifier performs an analog operation of converting the control voltage (VC) into the control signal (CI, CQ) similar to a sine wave or a cosine wave.

    摘要翻译： 矢量和移相器包括从输入信号（VIN）产生同相信号（VINI）和正交信号（VINQ）的90°移相器（1），四象限乘法器（2I），其改变 基于控制信号（CI）的同相信号（VINI）的幅度，基于控制信号（CQ）改变正交信号（VINQ）的幅度的四象限乘法器（2Q），组合器 3），其组合了同相信号（VINI）和正交信号（VINQ），以及控制电路（4）。 控制电路（4）包括产生参考电压的电压发生器和输出控制电压（VC）和基准电压之间的差分信号作为控制信号（CI，CQ）的差分放大器。 差分放大器进行与正弦波或余弦波相似的将控制电压（VC）转换为控制信号（CI，CQ）的模拟操作。