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公开(公告)号：US06534997B1
公开(公告)日：2003-03-18
申请号：US09685826
申请日：2000-10-10
Applicant: Masakazu Horishita , Kazunari Tsubaki , Kazuyoshi Shimizu
Inventor： Masakazu Horishita , Kazunari Tsubaki , Kazuyoshi Shimizu
IPC: G01R3111
CPC classification number: H04B10/07 , H04B10/071 , H04B10/27
Abstract: Locating a fault of a transmission line in a system which performs bidirectional optical communication between a station-side device and plural subscriber devices and in which a transmission line 1 extending from the station-side device is branched by a branching/coupling device into plural transmission lines 2 each connected to the subscriber devices. The present invention provides a supervisory unit to the transmission line 1 and attenuators to respective transmission lines 2. The supervisory unit emits an optical test signal, observes a reflected signal of the test signal while changing the attenuation of the attenuators and locates the fault based on a return time and a return loss when the test signal returns as a reflected signal.
Abstract translation: 在站侧设备与多个用户设备之间执行双向光通信的系统中定位传输线路故障，并且其中从站侧设备延伸的传输线路1由分支/耦合设备分支成多个传输 线路2每个连接到订户设备。 本发明提供了一种监控单元，用于传输线1和衰减器到相应的传输线2.监控单元发射一个光学测试信号，在改变衰减器衰减的同时观察测试信号的反射信号，并根据 当测试信号作为反射信号返回时，返回时间和回波损耗。
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公开(公告)号：US5892402A
公开(公告)日：1999-04-06
申请号：US741748
申请日：1996-11-05
Applicant: Kazunari Tsubaki , Norio Ueno
Inventor： Kazunari Tsubaki , Norio Ueno
Abstract: A drain terminal of a first N-channel MOS transistor is connected to an output side of a first current mirror input current via a voltage drop device, a first current mirror input current is supplied to the gate terminals of first, third, and fifth N-channel MOS transistors, and a second current mirror input current is supplied to the gate terminals of second and fourth N-channel MOS transistors.
Abstract translation: 第一N沟道MOS晶体管的漏极端子经由电压降装置连接到第一电流镜输入电流的输出侧，第一电流镜输入电流被提供给第一，第三和第五N的栅极端子 并且第二电流镜输入电流被提供给第二和第四N沟道MOS晶体管的栅极端子。
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Patent Agency Ranking
公开(公告)号：US07499212B2
公开(公告)日：2009-03-03
申请号：US11360582
申请日：2006-02-24
Applicant: Kazunari Tsubaki
Inventor： Kazunari Tsubaki
IPC: H04B10/17
CPC classification number: H01S3/06754 , H01S3/09415 , H01S3/10015 , H01S3/1305 , H04B10/296
Abstract: An optical amplifier is disclosed that includes an input monitoring part configured to monitor an input wavelength division multiplexed light; an amplification part configured to amplify and output the input wavelength division multiplexed light; an output monitoring part configured to monitor the wavelength division multiplexed light output from the amplification part; a gain control part configured to perform gain control so that the ratio of output light intensity monitored by the output monitoring part to input light intensity monitored by the input monitoring part is constant; and a response speed switching part configured to switch the response speed of the gain control.
Abstract translation: 公开了一种光放大器，其包括被配置为监视输入波分复用光的输入监视部分; 放大部，被配置为放大并输出所述输入波分复用光; 输出监视部，被配置为监视从放大部输出的波分复用光; 增益控制部，其被配置为执行增益控制，使得由所述输出监视部分监视的输出光强度与由所述输入监视部分监视的输入光强度的比率是恒定的; 以及响应速度切换部，被配置为切换所述增益控制的响应速度。
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公开(公告)号：US07330303B2
公开(公告)日：2008-02-12
申请号：US10804187
申请日：2004-03-19
Applicant: Takashi Sato , Kazunari Tsubaki , Tomoaki Takeyama , Keiko Sasaki , Shinya Inagaki
Inventor： Takashi Sato , Kazunari Tsubaki , Tomoaki Takeyama , Keiko Sasaki , Shinya Inagaki
CPC classification number: H04B10/296 , H01S3/06758 , H01S3/094003 , H01S3/094061 , H01S3/09415 , H01S3/10007 , H01S3/1608
Abstract: A wavelength division multiplexed optical amplifier, enabling elimination of the problems of oscillation and fluctuation in output due to ASE at the time of a rapid change in the number of input wavelengths, provided with a first-stage optical amplifying unit, second-stage optical amplifying unit, a common AGC circuit for common AGC of the first and second optical amplifying units, and a pumping light distribution means for applying pumping light to the first and second-stage optical amplifying units with a predetermined distribution ratio.
Abstract translation: 一种波分复用光放大器，能够消除在配置有第一级光放大单元的输入波长数迅速变化时由ASE引起的振荡问题和输出波动，第二级光放大 单元，用于第一和第二光学放大单元的公共AGC的公共AGC电路，以及用于以预定分配比将激励光施加到第一和第二级光放大单元的泵浦光分配装置。
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公开(公告)号：US20070064306A1
公开(公告)日：2007-03-22
申请号：US11360582
申请日：2006-02-24
Applicant: Kazunari Tsubaki
Inventor： Kazunari Tsubaki
CPC classification number: H01S3/06754 , H01S3/09415 , H01S3/10015 , H01S3/1305 , H04B10/296
Abstract: An optical amplifier is disclosed that includes an input monitoring part configured to monitor an input wavelength division multiplexed light; an amplification part configured to amplify and output the input wavelength division multiplexed light; an output monitoring part configured to monitor the wavelength division multiplexed light output from the amplification part; a gain control part configured to perform gain control so that the ratio of output light intensity monitored by the output monitoring part to input light intensity monitored by the input monitoring part is constant; and a response speed switching part configured to switch the response speed of the gain control.
Abstract translation: 公开了一种光放大器，其包括被配置为监视输入波分复用光的输入监视部分; 放大部，被配置为放大并输出所述输入波分复用光; 输出监视部，被配置为监视从放大部输出的波分复用光; 增益控制部，其被配置为执行增益控制，使得由所述输出监视部分监视的输出光强度与由所述输入监视部分监视的输入光强度的比率是恒定的; 以及响应速度切换部，被配置为切换所述增益控制的响应速度。
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公开(公告)号：US20050078358A1
公开(公告)日：2005-04-14
申请号：US10804187
申请日：2004-03-19
Applicant: Takashi Sato , Kazunari Tsubaki , Tomoaki Takeyama , Keiko Sasaki , Shinya Inagaki
Inventor： Takashi Sato , Kazunari Tsubaki , Tomoaki Takeyama , Keiko Sasaki , Shinya Inagaki
IPC: H01S3/00 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/23 , H04B10/07 , H04B10/2507 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02
CPC classification number: H04B10/296 , H01S3/06758 , H01S3/094003 , H01S3/094061 , H01S3/09415 , H01S3/10007 , H01S3/1608
Abstract: A wavelength division multiplexed optical amplifier, enabling elimination of the problems of oscillation and fluctuation in output due to ASE at the time of a rapid change in the number of input wavelengths, provided with a first-stage optical amplifying unit, second-stage optical amplifying unit, a common AGC circuit for common AGC of the first and second optical amplifying units, and a pumping light distribution means for applying pumping light to the first and second-stage optical amplifying units with a predetermined distribution ratio.
Abstract translation: 一种波分复用光放大器，能够消除在配置有第一级光放大单元的输入波长数迅速变化时由ASE引起的振荡问题和输出波动，第二级光放大 单元，用于第一和第二光学放大单元的公共AGC的公共AGC电路，以及用于以预定分配比将激励光施加到第一和第二级光放大单元的泵浦光分配装置。
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公开(公告)号：US06528981B1
公开(公告)日：2003-03-04
申请号：US09926717
申请日：2001-12-06
Applicant: Kazunari Tsubaki
Inventor： Kazunari Tsubaki
IPC: G05F316
Abstract: The low voltage current mirror circuit of the present invention including multiple circuit elements each forming a current mirror, and concatenating the multiple circuit elements to form a cascode current mirror circuit, comprises voltage dropping means for mutually connecting inter-control-electrode nodes of each of the multiple circuit elements, to cause the predetermined voltage drop between the inter-control-electrode nodes. According to such a simplified constitution, it is realized to lower the input voltage and output voltage of the current mirror circuit.
Abstract translation: 本发明的低电压电流镜电路包括各自形成电流镜的多个电路元件，并且连接多个电路元件以形成共源共栅电流镜电路，该电压反射镜电路包括用于相互连接各自的控制电极节点 多个电路元件，以引起控制间电极节点之间的预定电压降。 根据这种简化的结构，实现了降低电流镜电路的输入电压和输出电压。
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