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105 条记录 (耗时 0.026 秒)

    Optical receiving circuit and optical communication device
    3.
    发明授权
    Optical receiving circuit and optical communication device 失效
    光接收电路和光通信设备

    公开(公告)号：US06760552B1

    公开(公告)日：2004-07-06

    申请号：US09532420

    申请日：2000-03-23

    申请人： Akio Tajima ,  Hiroaki Takahashi ,  Soichiro Araki ,  Naoya Henmi ,  Yoshihiko Suemura ,  Yoshiharu Maeno ,  Seigo Takahashi

    发明人： Akio Tajima ,  Hiroaki Takahashi ,  Soichiro Araki ,  Naoya Henmi ,  Yoshihiko Suemura ,  Yoshiharu Maeno ,  Seigo Takahashi

    IPC分类号： H04B1006

    CPC分类号： H04B10/6931

    摘要： An optical receiving circuit 1 is composed of a preamplifier circuit 2, an output differential amplifier 3 and a mean value holding circuit 4. The optical receiving circuit 1 is connected to a photodetector 5 for receiving an input optical signal and outputting current. For the preamplifier circuit 2, a transimpedance type circuit may also be used. The preamplifier circuit 2 comprises a feedback resistor 21 and a resistor for detecting output voltage 22, the transimpedance gain is 55 dB &OHgr; and 3 dB bandwidth when the photodetector 5 the capacity of which is 0.2 pF is connected to its output is 8 GHz. The output differential amplifier 3 discriminates and regenerates data by regulating reference voltage Vref between the high level and the low level of the amplitude of an input signal. The mean value holding circuit 4 includes a sample-hold circuit 41 and capacity 42 for holding the mean value of voltage output from the preamplifier circuit 2. As a CR time constant based upon the capacity 42 and the resistor for detection 22 is 1 ns., the mean value level of a received signal can be detected in approximately one byte of the data of 10 Gb/s. The sample-hold circuit 41 samples the detected mean value level according to a sampling pulse from an external device and holds it. The output of the sample-hold circuit 41 is used for the reference voltage of the differential amplifier 3.

    摘要翻译： 光接收电路1由前置放大电路2，输出差分放大器3和平均值保持电路4组成。光接收电路1连接到用于接收输入光信号并输出​​电流的光电检测器5。 对于前置放大器电路2，也可以使用跨阻型电路。 前置放大器电路2包括反馈电阻器21和用于检测输出电压22的电阻器，当其电容为0.2pF的光电检测器5连接到其输出端时，跨阻增益为55dBΩ和3dB带宽为8GHz。 输出差分放大器3通过调节输入信号的幅度的高电平和低电平之间的参考电压Vref来识别和再生数据。 平均值保持电路4包括采样保持电路41和用于保持从前置放大器电路2输出的电压的平均值的电容42.由于基于电容42和检测电阻22的CR时间常数为1ns。 可以在10Gb / s的数据的大约一个字节中检测接收信号的平均值电平。 采样保持电路41根据来自外部设备的采样脉冲对检测到的平均值电平进行采样并保持。 采样保持电路41的输出用于差分放大器3的参考电压。

    Optical network
    4.
    发明授权
    Optical network 失效
    光网络

    公开(公告)号：US06429955B1

    公开(公告)日：2002-08-06

    申请号：US09218102

    申请日：1998-12-22

    申请人： Yoshihiko Suemura ,  Soichiro Araki ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    发明人： Yoshihiko Suemura ,  Soichiro Araki ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    IPC分类号： H04J1402

    CPC分类号： H04Q11/0001

    摘要： Disclosed is an optical network which has: wavelength tunable optical transmitters of number MN, where N is an integer of two or more, each of which outputs an optical signal with arbitrary one of M wavelengths &lgr;1, &lgr;2, . . . , &lgr;M, where M is an integer of two or more, that are different from one another; a MN×N optical switch whose input ports are connected to the respective wavelength tunable optical transmitters of number MN, and which allows optical signals input to different input ports to be output form its same output port; 1×M optical wavelength demultiplexers of number N which output demultiplexing optical signal with wavelengths &lgr;1, &lgr;2, . . . , &lgr;M input from output ports of the MN×N optical switch into each wavelength; and optical receivers of number MN which receive optical signals input from the 1×M optical wavelength demultiplexers of number N.

    摘要翻译： 公开了一种光网络，其具有：号MN的波长可调光发射机，其中N是两个或更多个的整数，每个都输出具有M个波长lambd1，lambd2的任意一个的光信号。 。 。 ，lambdM，其中M是两个或更多个彼此不同的整数; 一个MNxN光开关，其输入端口连接到MN号的各波长可调光发射机，并允许输入到不同输入端口的光信号从其相同的输出端口输出; 数字N的1xM光学波长解复用器，其输出具有波长lambd1，lambd2的解复用光信号。 。 。 ，将MNxN光开关的输出端口的lambdM输入到每个波长; 数字MN的光接收器接收从数字N的1MM光波分复用器输入的光信号。

    Optical packet exchange system and optical switch
    5.
    发明授权
    Optical packet exchange system and optical switch 失效
    光分组交换系统和光开关

    公开(公告)号：US06957018B2

    公开(公告)日：2005-10-18

    申请号：US10151789

    申请日：2002-05-21

    申请人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    发明人： Soichiro Araki ,  Yoshihiko Suemura ,  Akio Tajima ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    IPC分类号： H04B10/27 ,  H04B10/00 ,  H04L12/931 ,  H04Q3/00 ,  H04Q3/52 ,  H04Q11/00 ,  H04J14/00

    CPC分类号： H04Q11/0001 ,  H04L49/25 ,  H04L49/30 ,  H04L49/50 ,  H04Q2011/0024 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/005

    摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.

    摘要翻译： 一种光分组交换装置和光开关，其中，在没有要发送的分组的输入单元和没有要接收的分组的输出单元之间的连接模式的搜索被减少以便能够快速切换控制，即使在 交换装置的信道数量增加或网络速度较高。 提供多个输入单元，多个输出单元和光学开关。 每个输入单元包括输入缓冲器单元，并行/串行转换单元，电/光转换单元和用于在不存在要发送的分组的情况下发送虚拟分组的虚拟分组插入单元。 每个输出单元包括用于控制交换对方的交换对方争用解决单元，光/电转换单元，串行/并行转换单元和分组消除单元。 交换对手争用解决单元控制分组消除单元以消除虚拟分组。

    Bit synchronization circuit
    7.
    发明授权
    Bit synchronization circuit 有权
    位同步电路

    公开(公告)号：US06373911B1

    公开(公告)日：2002-04-16

    申请号：US09239090

    申请日：1999-01-27

    申请人： Akio Tajima ,  Yoshihiko Suemura ,  Soichiro Araki ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    发明人： Akio Tajima ,  Yoshihiko Suemura ,  Soichiro Araki ,  Seigo Takahashi ,  Yoshiharu Maeno ,  Naoya Henmi

    IPC分类号： H03D324

    CPC分类号： H04L7/02 ,  H03L7/0812 ,  H04L7/0083 ,  H04L7/0337 ,  H04L7/0338 ,  H04L7/10

    摘要： A bit synchronization circuit operates at high speed range as high as Gb/s or higher and can establish synchronization within 10 bits with rejecting jitter to permit accurate bit synchronization. The bit synchronization circuit thus generates a plurality of clocks having mutually different phases in synchronism with an input reference clock. A phase relationship between a plurality of clocks and an input data to be decided is discriminated by a phase comparator circuit. The clock having optimal phase relationship, namely clock having level transition timing having at a substantially center portion of mutually adjacent level transition timing of the input data, is determined by a phase determination circuit. An decision circuit and selector are provided for deciding input data at the level transition timing of the determined clock.

    摘要翻译： 位同步电路在高达Gb / s或更高的高速范围内工作，并且可以在10位内建立同步，同时抑制抖动以允许精确的位同步。 因此，比特同步电路产生与输入参考时钟同步的具有相互不同相位的多个时钟。 通过相位比较器电路鉴别多个时钟与待决定的输入数据之间的相位关系。 具有最佳相位关系的时钟，即具有在输入数据的相互相邻电平转换定时的大致中心部分处的电平转换定时的时钟由相位确定电路确定。 提供决定电路和选择器，用于在所确定的时钟的电平转换定时处决定输入数据。

    Data transmission system using specific pattern for synchronization
    8.
    发明授权
    Data transmission system using specific pattern for synchronization 失效
    数据传输系统采用特定的模式进行同步

    公开(公告)号：US5887039A

    公开(公告)日：1999-03-23

    申请号：US356555

    申请日：1994-12-15

    申请人： Yoshihiko Suemura ,  Naoya Henmi ,  Akio Tajima

    发明人： Yoshihiko Suemura ,  Naoya Henmi ,  Akio Tajima

    IPC分类号： H04J3/00 ,  H04J3/06 ,  H04L7/00 ,  H04L7/04 ,  H04L25/14

    CPC分类号： H04L25/14 ,  H04J3/0602

    摘要： Parallel digital data are transmitted along with a specific synchronization pattern added thereto. Each synchronization pattern adder adds the synchronization pattern at an equal timing for each channel. Parallel data after the synchronization pattern addition, are converted in parallel-to-serial converters into serial data which are in turn converted in an optical transmitter into optical signal. On the receiving side, the optical signal is converted in an optical receiver into an electric signal, from which the parallel data are restored in serial-to-parallel converters to be inputted to synchronization pattern detectors. The synchronization pattern detectors compare their shift register data and synchronization pattern and hold their synchronization pattern detection signal to be "1" for one time slot if the number of non-accord bits is within one. In the next time slot, a controller recognizes synchronization pattern detection when and only when all the synchronization pattern detection signals are "1". In this way, reliable synchronization pattern detection can be made regardless of the occurrence of any transmission error in the synchronization pattern.

    摘要翻译： 平行数字数据与添加到其中的特定同步模式一起发送。 每个同步模式加法器在每个通道的相同定时添加同步模式。 在同步模式添加之后的并行数据被并行转换为串行数据转换为串行数据，这些数据依次在光发射机中转换为光信号。 在接收侧，光信号在光接收机中被转换成电信号，并行数据在并行转换器中被还原，以被输入到同步模式检测器。 同步模式检测器比较它们的移位寄存器数据和同步模式，并且如果非协调位的数目在一个之内，则将它们的同步模式检测信号保持为一个时隙的“1”。 在下一个时隙中，当且当所有同步模式检测信号为“1”时，控制器识别同步模式检测。 以这种方式，可以进行可靠的同步模式检测，而不管同步模式中是否发生任何传输错误。

    Optical wavelength tunable filter
    9.
    发明授权
    Optical wavelength tunable filter 失效
    光波长可调滤波器

    公开(公告)号：US5506920A

    公开(公告)日：1996-04-09

    申请号：US188027

    申请日：1994-01-28

    申请人： Yoshihiko Suemura ,  Naoya Henmi ,  Akio Tajima ,  Haruo Takahashi ,  Hiroyuki Morimura

    发明人： Yoshihiko Suemura ,  Naoya Henmi ,  Akio Tajima ,  Haruo Takahashi ,  Hiroyuki Morimura

    IPC分类号： G01J3/26 ,  G02B5/28 ,  G02B7/00 ,  H01L41/09 ,  G02B6/26

    CPC分类号： G02B26/007 ,  H02N2/046

    摘要： An optical filter having a transmission wavelength to be tuned dependent on light incident angle is rotatively provided in a collimated light path. The optical filter is rotated by the displacement of a piezoelectric actuator by a structure in which the displacement is converted to the rotation of the optical filter. The converting structure comprises a displacement magnifying mechanism for magnifying the displacement to provide the magnified displacement and a motion converting mechanism for converting the magnified displacement to the rotation of the optical filter.

    摘要翻译： 具有根据光入射角调谐的透射波长的滤光器在准直光路中可旋转地设置。 滤光器通过压电致动器的位移而旋转，其结构是将位移转换为滤光器的旋转。 转换结构包括用于放大位移以提供放大位移的位移放大机构和用于将放大位移转换为滤光器的旋转的运动转换机构。