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    • 1. 发明专利
    • 光通信システム、宅側通信装置、局側通信装置および光通信方法
    • 光通信系统,光网络单元,光线路终端和光通信方法
    • JP2015061270A
    • 2015-03-30
    • JP2013195456
    • 2013-09-20
    • 日本電信電話株式会社Nippon Telegr & Teleph Corp
    • IKEDA NAMIKOTERADA KAZUHIKOUZAWA HIROYUKIURANO MASAMIKOIZUMI HIROSHISHIGEMATSU SATOSHI
    • H04B10/079H04B10/272H04L12/44
    • 【課題】宅側通信装置の省電力化を実現する。【解決手段】送信側光通信装置1は、電気−光変換部10と、光−電気変換部11と、受信側光通信装置2からの光信号に含まれる指令命令に従って、電気−光変換部10から出力する光信号の強度を変更する出力変更部12とを備える。受信側光通信装置2は、光−電気変換部20と、送信側光通信装置1からの光信号の品質を評価するための性能値を測定する性能値測定部21と、性能値に基づいて送信側光通信装置1からの光信号の品質を評価し、評価結果に応じて送信側光通信装置1からの光信号の強度を変更するための指令命令を含む光信号を送信側光通信装置1へ出力させる受信側評価部22と、電気−光変換部23とを備える。【選択図】図1
    • 要解决的问题:实现光网络单元的功率节省。解决方案:发送侧光通信设备1包括:电光转换单元10; 光电转换单元11; 以及输出改变单元12,用于根据包括在来自接收侧光通信设备2的光信号中的指令顺序来改变从电光转换单元10输出的光信号的强度。接收侧光通信设备2包括: 光电转换单元20; 性能值测量单元21,用于测量来自发送侧光通信设备1的用于评估光信号质量的性能值; 接收侧评估单元22,用于在制作包括用于改变来自发送侧的光信号的强度的指令顺序的光信号之前,基于性能值来评估来自发送侧光通信设备1的光信号的质量 将根据评估结果的光通信装置1输出到发送侧光通信装置1; 和电光转换单元23。
    • 2. 发明专利
    • Communication system and communication method
    • 通信系统和通信方法
    • JP2014195217A
    • 2014-10-09
    • JP2013071257
    • 2013-03-29
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • NAKANO SHINSUKENOGAWA MASASHIKOIZUMI HIROSHI
    • H04B13/00H04B1/40H04L25/49
    • PROBLEM TO BE SOLVED: To allow a transceiver to reduce power consumption and to be miniaturized, and to transmit and receive a short pulse signal with wide frequency components as it is.SOLUTION: A communication system includes: a transmitter that transmits a short pulse signal to a dielectric waveguide 5; and a receiver that receives the short pulse signal having propagated through the dielectric waveguide 5 to restore a data signal. The transmitter comprises: an impulse generator 1 for generating a short pulse signal synchronized with the rise or fall of an input RZ data signal; and a transmission antenna 2 for transmitting the short pulse signal generated by the impulse generator 1 to the dielectric waveguide 5. The receiver comprises: a reception antenna 3 for receiving the short pulse signal having propagated through the dielectric waveguide 5; and a pulse detector 4 for converting the short pulse signal taken in by the reception antenna 3 into an RZ data signal or NRZ data signal.
    • 要解决的问题:使收发机能够降低功耗并小型化,并且以宽频率组件传输和接收短脉冲信号。解决方案:一种通信系统包括:发送短脉冲信号的发射机 介电波导5; 以及接收器,其接收通过介质波导5传播的短脉冲信号,以恢复数据信号。 发射机包括:脉冲发生器1,用于产生与输入RZ数据信号的上升或下降同步的短脉冲信号; 以及用于将由脉冲发生器1产生的短脉冲信号发送到介质波导5的发送天线2.接收机包括:接收天线3,用于接收通过电介质波导5传播的短脉冲信号; 以及用于将由接收天线3取入的短脉冲信号转换为RZ数据信号或NRZ数据信号的脉冲检测器4。
    • 3. 发明专利
    • Current switching circuit
    • 电流切换电路
    • JP2014045112A
    • 2014-03-13
    • JP2012187331
    • 2012-08-28
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • TOGASHI MINORUKOIZUMI HIROSHIOTOMO YUSUKE
    • H01S5/042H03F3/34H03F3/45
    • PROBLEM TO BE SOLVED: To allow a voltage lower than a withstand voltage to be added to a transistor even at shutdown while maintaining high-speed operation.SOLUTION: Transistors Q1P and Q1N and diodes D1P to DNP and D1N to DNN are provided in an input circuit, and transistors Q3 and Q5, resistors RLP, RLN, RQ3S, and RQ4S, and diodes DL1 to DLL are provided in an output circuit. Current-source transistors Q2P and Q2N, resistors RS1P and RS1N, bias current sources JBIAS1P and JBIAS1N, and switches SW1P and SW1N are provided in a constant-current-source circuit for the input circuit, and a transistor Q5, a resistor RSL, a bias current source JBIAS2, and a switch SW2 are provided in a constant-current-source circuit for the output circuit. During a normal operation, the switches SW1P, SW1N, and SW2 select terminals VCS1P, VCS1N, and VCS20, and during shutdown, the switches select terminals VOFF1P, VOFF1N, and VOFF2.
    • 要解决的问题:即使在关闭时也允许将低于耐压的电压加入到晶体管中,同时保持高速运行。解决方案:晶体管Q1P和Q1N以及二极管D1P至DNP和D1N至DNN提供在输入端 电路,晶体管Q3和Q5,电阻器RLP,RLN,RQ3S和RQ4S以及二极管DL1至DLL都设置在输出电路中。 电流源晶体管Q2P和Q2N,电阻RS1P和RS1N,偏置电流源JBIAS1P和JBIAS1N以及开关SW1P和SW1N设置在用于输入电路的恒流源电路中,晶体管Q5,电阻RSL, 偏置电流源JBIAS2和开关SW2设置在用于输出电路的恒流源电路中。 在正常操作期间,开关SW1P,SW1N和SW2选择端子VCS1P,VCS1N和VCS20,并且在关断期间,开关选择端子VOFF1P,VOFF1N和VOFF2。
    • 4. 发明专利
    • Low power laser drive circuit
    • 低功率激光驱动电路
    • JP2011146469A
    • 2011-07-28
    • JP2010004899
    • 2010-01-13
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • TOGASHI MINORUKOIZUMI HIROSHI
    • H01S5/062
    • PROBLEM TO BE SOLVED: To provide a laser drive circuit in which low-power consumption is enabled at laser extinction, without disturbing the high-speed operation of a laser drive circuit.
      SOLUTION: As a bias control signal which adjusts the current of current sources I10, I20 of a modulation circuit 10 and a bias circuit 20, a control voltage Vh, which makes a predetermined current output from the current sources I10, I20, when a transmitting enable signal TX_EN is ON; and a control voltage Vl which intercepts the current of the current sources I10, I20; when the transmitting enable signal TX_EN is OFF are prepared; and these control voltages Vh, Vl are set to have a relation, where Vh, Vl are such that Vh>Von>Vl>0 V holds to the operation minimum voltage Von of the current sources I10, I20.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种在激光灭绝时能够实现低功耗的激光驱动电路,而不会干扰激光驱动电路的高速操作。 解决方案:作为调整电路10的电流源I10,I20和偏置电路20的电流的偏置控制信号,从电流源I10,I20输出预定电流的控制电压Vh, 当发送使能信号TX_EN为ON时; 以及截止电流源I10,I20的电流的控制电压V1; 当发送使能信号TX_EN为OFF时; 并且这些控制电压Vh,V1被设定为具有关系,其中Vh,V1对于电流源I10,I20的操作最小电压Von保持Vh> Von> V1> 0V。 版权所有(C)2011,JPO&INPIT
    • 5. 发明专利
    • Laser driving circuit
    • 激光驱动电路
    • JP2010267924A
    • 2010-11-25
    • JP2009120223
    • 2009-05-18
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • TOGASHI MINORUKOIZUMI HIROSHIOTOMO YUSUKE
    • H01S5/062
    • PROBLEM TO BE SOLVED: To provide a laser driving circuit achieving a high-speed burst response and a power reduction at laser extinction. SOLUTION: The laser driving circuit includes: a modulation circuit 10 for supplying a modulation current to a laser diode LD according to input burst data; a bias circuit 20 for applying a bias current to the laser diode LD; and an APC circuit 30 for controlling the modulation current and the bias current so as to obtain a desired emission intensity and a desired extinction ratio in the laser diode LD. When a transmission enable signal TX_EN is on, the laser diode LD is burst-driven according to the input burst data, and when the transmission enable signal TX_EN is off, the laser diode LD is extinguished. The modulation circuit 10 includes a modulation current cutoff circuit 15 for cutting off the modulation current when the transmission enable signal TX_EN is off, and a bias circuit 20 includes a bias current cutoff circuit 21 for cutting off the bias current when the transmission enable signal TX_EN is off. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供实现激光灭绝时的高速突发响应和功率降低的激光驱动电路。 解决方案:激光驱动电路包括:调制电路10,用于根据输入的突发数据向激光二极管LD提供调制电流; 用于向激光二极管LD施加偏置电流的偏置电路20; 以及用于控制调制电流和偏置电流以便在激光二极管LD中获得期望的发光强度和期望的消光比的APC电路30。 当发送使能信号TX_EN导通时,激光二极管LD根据输入的脉冲串数据进行突发驱动,当发送使能信号TX_EN关闭时,激光二极管LD熄灭。 调制电路10包括调制电流切断电路15,用于在发送使能信号TX_EN为关闭时切断调制电流,偏置电路20包括用于在发送使能信号TX_EN时切断偏置电流的偏置电流切断电路21 已关闭。 版权所有(C)2011,JPO&INPIT
    • 6. 发明专利
    • Laser output automatic control circuit
    • 激光输出自动控制电路
    • JP2010199218A
    • 2010-09-09
    • JP2009040940
    • 2009-02-24
    • Nippon Telegr & Teleph Corp Ntt Electornics CorpNttエレクトロニクス株式会社日本電信電話株式会社
    • KOIZUMI HIROSHITOGASHI MINORUKANDA ATSUSHITERADA JUNENDO MASAHIRO
    • H01S5/0683H04B10/07H04B10/272H04B10/293H04B10/40H04B10/50H04B10/564H04B10/572H04B10/60
    • PROBLEM TO BE SOLVED: To provide a laser output automatic control circuit capable of performing APC initialization at high speed and also holding a laser bias control value for a long time.
      SOLUTION: The laser output automatic control circuit includes: an analog holding circuit which, according to a burst ON/OFF signal, operates the level of a laser bias control signal until laser output intensity reaches a predetermined value in a burst ON state and holds the level of the laser bias control signal in a holding capacitor in a burst OFF state; and a digital holding circuit which inputs the level of the laser bias control signal in the burst ON state and holds the level of the laser bias control signal in the burst OFF signal to supply the held level of the laser bias control signal to the holding capacitor of the analog holding circuit during transition from the burst OFF state to the burst ON state.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种能够高速执行APC初始化并且长时间保持激光偏压控制值的激光输出自动控制电路。 解决方案:激光输出自动控制电路包括:模拟保持电路,根据突发ON / OFF信号,操作激光偏压控制信号的电平,直到激光输出强度达到突发ON状态下的预定值 并且将保持电容器中的激光偏置控制信号的电平保持在突发关断状态; 以及数字保持电路,其在脉冲串导通状态下输入激光偏置控制信号的电平,并将激光偏置控制信号的电平保持在脉冲串关断信号中,以将激光偏置控制信号的保持电平提供给保持电容器 在从突发关闭状态转换到突发接通状态期间的模拟保持电路。 版权所有(C)2010,JPO&INPIT
    • 9. 发明专利
    • Sphygmomanometer
    • 血压计
    • JP2007105132A
    • 2007-04-26
    • JP2005297098
    • 2005-10-12
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • KOIZUMI HIROSHIMINO SHINJISHIMADA JUNICHITATARA NAOYOSHIHAYASHIDA SHOICHI
    • A61B5/022
    • PROBLEM TO BE SOLVED: To provide a sphygmomanometer capable of increasing the signal strength of pulse waves without increasing noise in the sphygmomanometer for detecting the pulse waves using a photoelectric pulse wave system. SOLUTION: The sphygmomanometer is provided with a photoelectric sensor in which a light receiving element receives emitted light emitted by a light emitting element, and detects the pulse waves by detecting the scattered light which is the emitted light scattered in a living body by the light receiving element. The sphygmomanometer is provided with a reflector for reflecting the emitted light emitted by the light emitting element or the scattered light scattered in the living body to the photoelectric sensor. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种能够增加脉波的信号强度而不增加血压计中的噪声的血压计,用于使用光电脉冲波系统检测脉搏波。 解决方案:血压计设置有光接收元件,其中光接收元件接收由发光元件发射的发射光,并且通过检测作为在活体中散射的发射光的散射光来检测脉波 光接收元件。 血压计设置有用于将由发光元件发射的发射光或散射在生物体中的散射光反射到光电传感器的反射器。 版权所有(C)2007,JPO&INPIT