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    • 51. 发明授权
    • Optical fiber connector with retainer
    • 带保持架的光纤连接器
    • US4986625A
    • 1991-01-22
    • US391642
    • 1989-08-07
    • Hiromi YamadaEiji YoshidaKenji Takahasi
    • Hiromi YamadaEiji YoshidaKenji Takahasi
    • G02B6/38G02B6/42H01R4/24
    • G02B6/3801G02B6/3817G02B6/3887G02B6/4246G02B6/4292H01R4/2454
    • An optical fiber connector comprises a retaining plate (20,60,85,95,113,142,173) made of comparatively thin sheet metal and having a slot (22,61,86,113a,173a) fomred therein which has an opening at one end, the opening having a width smaller than an outer diameter of an optical fiber jacket (5a,101b,103a) and larger than a diameter of a fiber optic core (5a,101a, 103d). The retaining plate is inserted in a connector body (10,70,80,90,111,141,171) at almost a right angle to an axial direction of the optical fiber cable (5,101,103) disposed in the connector body with the opening of the slot facing toward the optical fiber cable, and the retaining plate is pressed into the connector body and the jacket of the optical fiber cable in the connector body.
    • 光纤连接器包括由比较薄的金属板制成并具有在其中具有开口的槽(22,61,86,113a,173a)的保持板(20,60,85,95,113,142,173),所述槽在一端具有开口,所述开口具有 宽度小于光纤护套(5a,101b,103a)的外径,大于光纤芯(5a,101a,103d)的直径。 保持板相对于设置在连接器主体中的光纤电缆(5,101,103)的轴向几乎成直角插入连接器主体(10,70,80,90,111,141,171)中,其中开口面向光学 光纤电缆,并且保持板被压入连接器主体中,并且光纤电缆的护套被压入连接器主体中。
    • 55. 发明申请
    • DIGITAL SIGNAL PROCESSING APPARATUS
    • 数字信号处理设备
    • US20130308960A1
    • 2013-11-21
    • US13983233
    • 2012-02-07
    • Kengo HorikoshiEtsushi YamazakiTakayuki KobayashiEiji YoshidaYutaka Miyamoto
    • Kengo HorikoshiEtsushi YamazakiTakayuki KobayashiEiji YoshidaYutaka Miyamoto
    • H04B1/10
    • H04B1/10H03H21/0012H03H2021/0092H04B10/616H04L25/03261
    • A parameter of an adaptive filter is optimized so that inter-symbol interference having an amount corresponding to an inserted fixed filter remains. A digital signal processing apparatus which is included in an optical signal receiver and processes a digital signal converted from an optical signal is provided with: a linear adaptive filter which applies a dynamically controllable linear transfer function to the digital signal; a maximum likelihood sequence decoder which applies a transfer function of a transmission-path model to a plurality of signal sequence candidates to generate a plurality of reference signals, and decodes a reception signal using maximum likelihood sequence estimation which evaluates the differences between an output signal of the linear adaptive filter and the reference signals to estimate the most likely transmission time sequence; a signal regenerator which generates a signal corresponding to decoded data from the maximum likelihood sequence decoder; a feedback distortion adding filter which adds distortion that is equivalent to the transmission-path model used in the maximum likelihood sequence decoder to an output signal of the signal regenerator; and an adaptive equalization filter control block which updates a tap coefficient of the linear adaptive filter in accordance with an LMS algorithm using the difference between a target signal that is an output signal of the feedback distortion adding filter and the digital signal as an error signal.
    • 对自适应滤波器的参数进行优化,使得具有与插入的固定滤波器相对应的量的符号间干扰保留。 包括在光信号接收机中并处理从光信号转换的数字信号的数字信号处理装置具有:向数字信号施加动态可控线性传递函数的线性自适应滤波器; 最大似然序列解码器,其将传输路径模型的传递函数应用于多个信号序列候选以产生多个参考信号,并且使用最大似然序列估计解码接收信号,所述最大似然序列估计用于评估接收信号的输出信号 线性自适应滤波器和参考信号来估计最可能的传输时间序列; 信号再生器,其生成对应于来自最大似然序列解码器的解码数据的信号; 将与最大似然序列解码器中使用的传输路径模型相当的失真与信号再生器的输出信号相加的反馈失真相加滤波器; 以及自适应均衡滤波器控制块,其使用作为反馈失真相加滤波器的输出信号的目标信号和数字信号之间的差作为误差信号,根据LMS算法来更新线性自适应滤波器的抽头系数。
    • 57. 发明授权
    • Semiconductor device and method of manufacturing semiconductor device
    • 半导体装置及其制造方法
    • US08421155B2
    • 2013-04-16
    • US13310298
    • 2011-12-02
    • Akira KatakamiEiji Yoshida
    • Akira KatakamiEiji Yoshida
    • H01L27/12H01L21/335
    • H01L21/3081H01L21/743H01L21/76229H01L29/665H01L29/7833
    • A semiconductor device includes a first device isolation insulating film formed in a semiconductor substrate, a first well having a first conductivity type, defined by the first device isolation insulating film, and shallower than the first device isolation insulating film, a second device isolation insulating film formed in the first well, shallower than the first well, and defining a first part of the first well and a second part of the first well, a gate insulating film formed above the first part, a gate electrode formed above the gate insulating film, and an interconnection electrically connected to the second part of the first well and the gate electrode, wherein an electric resistance of the first well in a first region below the second device isolation insulating film is lower than an electric resistance of the first well in a second region other than the first region on the same depth level.
    • 半导体器件包括形成在半导体衬底中的第一器件隔离绝缘膜,由第一器件隔离绝缘膜限定并且比第一器件隔离绝缘膜浅的具有第一导电类型的第一阱,第二器件隔离绝缘膜 形成在第一阱中,比第一阱浅,并且限定第一阱的第一部分和第一阱的第二部分,形成在第一部分上方的栅极绝缘膜,形成在栅极绝缘膜上方的栅电极, 以及电连接到第一阱和栅电极的第二部分的互连,其中在第二器件隔离绝缘膜下方的第一区域中的第一阱的电阻低于第二阱中的第一阱的电阻 区域以外的第一区域在相同的深度级别。
    • 60. 发明申请
    • CHROMATIC DISPERSION VALUE CALCULATING APPARATUS, OPTICAL SIGNAL RECEIVING APPARATUS, OPTICAL SIGNAL TRANSMITTING APPARATUS, AND CHROMATIC DISPERSION VALUE CALCULATION METHOD
    • 色散值计算装置,光信号接收装置,光信号传输装置和色散值计算方法
    • US20120099864A1
    • 2012-04-26
    • US13380432
    • 2010-07-14
    • Koichi IshiharaTakayuki KobayashiRiichi KudoYasushi TakatoriMunehiro MatsuiMasato MizoguchiTadao NakagawaEtsushi YamazakiAkihide SanoYutaka MiyamotoEiji YoshidaShogo Yamanaka
    • Koichi IshiharaTakayuki KobayashiRiichi KudoYasushi TakatoriMunehiro MatsuiMasato MizoguchiTadao NakagawaEtsushi YamazakiAkihide SanoYutaka MiyamotoEiji YoshidaShogo Yamanaka
    • H04J14/06H04B10/00
    • H04B10/0775H04B3/06H04B10/25133
    • In order to compensate for chromatic dispersion caused by optical fiber transmission in a communication system with coherent detection using optical signals, specific frequency band signals are used to enable estimation of a chromatic dispersion value. The chromatic dispersion value calculating apparatus is provided with: a signal distributing circuit which distributes, into a plurality of signal sequences, an electrical digital signal converted from received optical signals of an optical signal transmitted by an optical signal transmitting apparatus, in which a known signal with concentrated frequency components of a plurality of specific frequencies is appended to a signal generated from a transmission data sequence; a plurality of frequency band pass filter circuits, each of which separating only each of a plurality of specific frequency components in which the known signal is included from each of the signal sequences distributed by the signal distributing circuit, and passing each of the specific frequency components therethrough; a plurality of power calculating circuits which are provided so as to correspond respectively to the plurality of frequency band pass filter circuits and which calculate power values of signals output from the corresponding frequency band pass filter circuits; a delay time calculating circuit which detects times at which power has the maximum value or times at which the power exceeds a predetermined threshold value, respectively from signal sequences of the power values output from the plurality of power calculating circuits, and which compares the detected times; and a chromatic dispersion value calculating circuit which calculates a chromatic dispersion value based on a comparison result of the times by the delay time calculating circuit.
    • 为了补偿在使用光信号的相干检测的通信系统中由光纤传输引起的色散,使用特定的频带信号来使得能够估计色散值。 色散值计算装置具有:信号分配电路,其将由光信号发送装置发送的光信号的接收光信号转换成的数字信号分配成多个信号序列,其中已知信号 将多个特定频率的集中频率分量附加到从发送数据序列生成的信号上; 多个频带滤波器电路,每个频带通滤波器电路仅分离由信号分配电路分配的每个信号序列中包含已知信号的多个特定频率分量中的每一个,并且使每个特定频率分量 通过 多个功率计算电路,被设置为分别对应于所述多个频带滤波器电路,并且计算从相应的频带滤波器电路输出的信号的功率值; 延迟时间计算电路,分别从多个功率计算电路输出的功率值的信号序列中分别检测功率达到功率超过预定阈值的最大值或多次的时间,并且将延迟时间计算电路 ; 以及色散值计算电路,其基于延迟时间计算电路的时间的比较结果来计算色散值。