公开(公告)号：US3976484A

公开(公告)日：1976-08-24

申请号：US469892

申请日：1974-05-14

申请人： Yujiro Ando ,  Katsunobu Ohara ,  Keiji Tanaka

发明人： Yujiro Ando ,  Katsunobu Ohara ,  Keiji Tanaka

IPC分类号： G03G15/05 ,  G03G13/22

CPC分类号： G03G15/051

摘要： This invention provides an electrophotographic process for forming an image using a photosensitive screen having a plurality of fine openings. The screen has a conductive material on which a photoconductive material is provided, wherein at least a part of the conductive material remains exposed. The peripheries of the openings of the screen are capable of retaining charges as a result of an image exposure to form a primary electrostatic latent image on the screen.

摘要翻译： 本发明提供一种使用具有多个细孔的感光屏形成图像的电子照相方法。 屏幕具有导电材料，其上提供光电导材料，其中至少一部分导电材料保持暴露。 屏幕的开口的周边能够保持作为图像曝光的结果，从而在屏幕上形成初级静电潜像。

公开(公告)号：US08721295B2

公开(公告)日：2014-05-13

申请号：US11813716

申请日：2006-04-07

申请人： Tetsuro Sugiura ,  Keiji Tanaka ,  Toshiharu Nakazawa ,  Koichi Kido ,  Tomoyuki Yamazaki

发明人： Tetsuro Sugiura ,  Keiji Tanaka ,  Toshiharu Nakazawa ,  Koichi Kido ,  Tomoyuki Yamazaki

IPC分类号： F04B37/14 ,  F04B49/00

CPC分类号： F04B51/00 ,  F04C18/126 ,  F04C18/16 ,  F04C23/001 ,  F04C25/02 ,  F04C2220/10 ,  F04C2270/80 ,  F04C2280/02

摘要： There are provided a vacuum pump self-diagnosis method, a vacuum pump self-diagnosis system, a vacuum pump central monitoring system capable of making self-diagnosis of a dry vacuum pump. A vacuum pump self-diagnosis method decides the occurrence of failure and generates an alarm when a predetermined alarm set value is exceeded by an integrated value or an average value of a current of a motor for rotating a rotor of said vacuum pump. In a vacuum pump self-diagnosis system for making self-diagnosis of a vacuum pump which comprises a casing and a rotor rotatably arranged in the casing for sucking and discharging a gas through rotations of the rotor, the rotor comprises a plurality of stages and a pressure sensor is provided between the rotor stages. A self-diagnosis unit is provided for calculating an integrated value or an average value of a current of a motor for rotating said rotor, and making self-diagnosis of the vacuum pump when the integrated value or average value exceeds a predetermined alarm set value. The self-diagnosis unit switches from one self-diagnosis calculation method to another or interrupts the self-diagnosis calculation based on a pressure value detected by said pressure sensor.

摘要翻译： 提供真空泵自诊断方法，真空泵自诊断系统，能够对干式真空泵进行自诊断的真空泵中央监控系统。 真空泵自诊断方法决定故障的发生，并且当超过预定的报警设定值的积分值或用于旋转所述真空泵的转子的电动机的电流的平均值时，产生报警。 在用于进行真空泵的自诊断的真空泵自诊断系统中，所述真空泵包括壳体和可转动地设置在所述壳体中的转子，用于通过所述转子的旋转吸入和排出气体，所述转子包括多个级和 压力传感器设置在转子级之间。 提供自诊断单元，用于计算用于旋转所述转子的电动机的电流的积分值或平均值，并且当所述积分值或平均值超过预定报警设定值时，进行所述真空泵的自诊断。 自诊断单元从一个自诊断计算方法切换到另一个，或者基于由所述压力传感器检测到的压力值中断自诊断计算。

公开(公告)号：US08406262B2

公开(公告)日：2013-03-26

申请号：US12984219

申请日：2011-01-04

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： H01S5/06 ,  H01S5/068

CPC分类号： H01S5/0428

摘要： An LD driver is disclosed, which improves the rising and falling times of the driving current for the LD. The LD driver includes an inverting amplifier, an emitter follower connected in down stream of the inverting amplifier, a driving transistor driven by the emitter follower, and a current-mirror circuit connected in series to the inverting amplifier. The mirror current generated from the current flowing in the inverting amplifier is provided to the output of the emitter follower served for discharging the input capacitance of the driving transistor.

摘要翻译： 公开了LD驱动器，其改善了LD的驱动电流的上升和下降时间。 LD驱动器包括反相放大器，连接在反相放大器下游的射极跟随器，由射极跟随器驱动的驱动晶体管和与反相放大器串联连接的电流镜电路。 从在反相放大器中流动的电流产生的镜电流被提供给用于对驱动晶体管的输入电容进行放电的射极跟随器的输出端。

公开(公告)号：US08405461B2

公开(公告)日：2013-03-26

申请号：US13075474

申请日：2011-03-30

申请人： Akihiro Moto ,  Keiji Tanaka

发明人： Akihiro Moto ,  Keiji Tanaka

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H03F2200/411 ,  H03F2203/45528

摘要： A trans-impedance amplifier (TIA) for a light-receiving circuit is disclosed where the TIA reduces the power consumption as suppressing the degradation of the signal quality in high frequency regions. The TIA comprises a primary core, a dummy core, and a differential amplifier that receives each output of two cores in the differential mode. Two cores have an arrangement substantially same to each other except that the power consumption thereof is smaller in the dummy core. Because the output impedance of two cores becomes substantially equal, the scattering parameter of the common mode to the differential mode at the output of the primary core becomes small enough.

摘要翻译： 公开了一种用于光接收电路的跨阻放大器（TIA），其中TIA在抑制高频区域中的信号质量劣化的情况下降低了功耗。 TIA包括在差分模式下接收两个核心的每个输出的初级核心，虚拟核心和差分放大器。 两个芯具有彼此基本相同的布置，除了在虚拟芯中的功耗较小。 因为两个核的输出阻抗变得基本相等，所以在初级核的输出处的共模到差分模的散射参数变得足够小。

公开(公告)号：US08358938B2

公开(公告)日：2013-01-22

申请号：US12572794

申请日：2009-10-02

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： H04B10/06

CPC分类号： H04B10/07955 ,  H04B2210/071

摘要： An optical receiver able to generate the LOS alarm reliably is disclosed. The optical receiver module in the optical receiver provides a level monitor that monitors the average of the optical input, compares it with a reference and generates a decision signal that is provided to the squelching unit. The squelching unit, by receiving the decision signal, isolates the outputs of the output buffer from the inputs thereof and fixes the outputs of the receiver module in the level “0” or the level “1”. Even the main amplifier is coupled with the receiver optical module in the AC mode; no complicated response appears in the input of the main amplifier.

摘要翻译： 公开了能够可靠地生成LOS报警的光接收机。 光接收器中的光接收器模块提供监视光输入的平均值的电平监视器，将其与参考值进行比较，并产生提供给静噪单元的判定信号。 压缩单元通过接收判定信号将输出缓冲器的输出与其输入隔离，并将接收器模块的输出固定在电平0或电平1中。即使主放大器与接收器光模块耦合 交流模式; 在主放大器的输入端不出现复杂的响应。

公开(公告)号：US08073030B2

公开(公告)日：2011-12-06

申请号：US12508045

申请日：2009-07-23

申请人： Akihiro Moto ,  Keiji Tanaka

发明人： Akihiro Moto ,  Keiji Tanaka

IPC分类号： H01S3/00

CPC分类号： H01S5/06808 ,  H01S5/0427 ,  H01S5/06804 ,  H01S5/06832

摘要： A driver circuit for the laser diode is disclosed. The driver circuit has the shunt configuration with a switching transistor connected in parallel to the laser diode to shunt the current flowing in the laser diode. In the present invention, the bias for the switching transistor is varied as the operating temperature of the laser diode. In addition, the gate bias for the switching transistor is compensated for the temperature dependence of the switching transistor.

摘要翻译： 公开了一种用于激光二极管的驱动电路。 驱动器电路具有并联配置，其中开关晶体管并联连接到激光二极管以分流在激光二极管中流动的电流。 在本发明中，开关晶体管的偏置随着激光二极管的工作温度而变化。 此外，开关晶体管的栅极偏置被补偿了开关晶体管的温度依赖性。

公开(公告)号：US07835268B2

公开(公告)日：2010-11-16

申请号：US11493100

申请日：2006-07-25

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： G01R31/08 ,  G02F1/00

CPC分类号： H04J14/0291 ,  H04B10/032 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0297 ,  H04Q11/0067 ,  H04Q2011/0081

摘要： An optical termination system is provided. The optical termination system includes a working Optical Line Terminal (OLT) that communicates with a plurality of Optical Network Units (ONUs) near end users through an optical transmission line. The OLT includes a control information storage to store control information of the plurality of ONUs. In addition, the optical termination system includes a standby OLT, which includes a storage to store the control information to be transmitted from the working OLT. Furthermore, the optical termination system includes a controller that controls switching from the working OLT to the standby OLT.

摘要翻译： 提供光终端系统。 光终端系统包括通过光传输线路与终端用户附近的多个光网络单元（ONU）进行通信的工作的光线路终端（OLT）。 OLT包括用于存储多个ONU的控制信息的控制信息存储。 此外，光终端系统包括备用OLT，其包括用于存储要从工作OLT发送的控制信息的存储器。 此外，光终端系统包括控制器，其控制从工作OLT到备用OLT的切换。

公开(公告)号：US07782137B2

公开(公告)日：2010-08-24

申请号：US12232015

申请日：2008-09-09

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F3/45183 ,  H03F3/45748 ,  H03F3/45973 ,  H03F2203/45138 ,  H03F2203/45212 ,  H03F2203/45441 ,  H03F2203/45521 ,  H03F2203/45588 ,  H03F2203/45682

摘要： A new offset canceling circuit for a differential circuit is disclosed whose input offset voltage may be cancelled independent of the variation of the input level, accordingly, enables the cut-off frequency of the canceling circuit unchanged. The offset canceller of the invention provides a buffer amplifier and a filter. The filter includes a capacitance multiplier including an operational amplifier (Op-Amp) operating in the inverting mode and a capacitor connected between the input and output of the Op-Amp. The Op-Amp operating in the inverting mode whose closed loop gain is solely determined by resistors, and the capacitance of the capacitor is multiplied by the closed loop gain of the Op-Amp by the Miller effect.

摘要翻译： 公开了一种用于差分电路的新的偏移消除电路，其输入偏移电压可以被取消，而与输入电平的变化无关，因此能够使取消电路的截止频率不变。 本发明的偏移消除器提供缓冲放大器和滤波器。 滤波器包括电容乘法器，其包括以反相模式工作的运算放大器（Op-Amp）和连接在运算放大器的输入和输出端之间的电容器。 运算在反相模式下的运算放大器，其闭环增益仅由电阻器确定，电容器的电容乘以运算放大器的闭环增益乘以米勒效应。

公开(公告)号：US20100209100A1

公开(公告)日：2010-08-19

申请号：US12772585

申请日：2010-05-03

申请人： Katsumi Uesaka ,  Keiji Tanaka

发明人： Katsumi Uesaka ,  Keiji Tanaka

IPC分类号： H04B10/08 ,  H04B10/06

CPC分类号： H04B10/66 ,  H04B10/0799

摘要： The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode to generate a photocurrent Ipd, a current mirror circuit to reflect the photocurrent into a mirrored current Imon, a current-to-voltage converter to convert the mirrored current Imon to a voltage signal, switch to connect/cut the current mirror circuit with the current-to-voltage converter, and a correction unit for subtracting a signal when the switch is connected from a signal when the switch is cut.

摘要翻译： 本发明提供一种即使当该电平相当小时也能够准确地监视光输入信号的电平的光接收器。 光接收器包括光电二极管以产生光电流Ipd，将光电流反射成镜像电流Imon的电流镜电路，用于将镜像电流Imon转换成电压信号的电流 - 电压转换器，切换到连接/切割 具有电流 - 电压转换器的电流镜电路，以及用于当开关切断时从信号连接开关时减去信号的校正单元。

公开(公告)号：US07558482B2

公开(公告)日：2009-07-07

申请号：US11251608

申请日：2005-10-13

申请人： Keiji Tanaka ,  Noboru Edagawa

发明人： Keiji Tanaka ,  Noboru Edagawa

IPC分类号： H04J14/08

CPC分类号： H04L12/12 ,  Y02D50/40

摘要： The invention is applied to a PON system including an optical line terminal (OLT) at a center station, a plurality of optical network units (ONUs) at subscribers' sites, and an optical transmission line shared by the plurality ONUs to optically connect between the OLT and the plurality of ONUs. Each of the ONUs requests the OLT to assign a logical link according to start-up of an application.

摘要翻译： 本发明应用于包括中心站的光线路终端（OLT），用户站点处的多个光网络单元（ONU）和由多个ONU共享的光传输线的PON系统，以在 OLT和多个ONU。 每个ONU请求OLT根据应用的启动分配逻辑链路。