公开(公告)号：US08385752B2

公开(公告)日：2013-02-26

申请号：US12689827

申请日：2010-01-19

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： H04B10/12

CPC分类号： H04B10/504 ,  H01S5/042

摘要： An LD-Driver with a back termination circuit is disclosed. The back termination circuit of the invention provides a transistor as an active device, a current source to provide a bias current to the transistor, and a resistor as a passive element that couples the transmission lines carrying a differential signal thereon. Because the transistor shows a differential resistance of several tens of ohms by providing only a few milli-amperes, the output impedance of the LD-Driver may be substantially matched with the characteristic impedance of the transmission line with lesser additional power consumption.

摘要翻译： 公开了具有背面端接电路的LD驱动器。 本发明的背面终端电路提供了作为有源器件的晶体管，向晶体管提供偏置电流的电流源以及耦合在其上承载差分信号的传输线的无源元件的电阻器。 由于晶体管通过仅提供几毫安来显示几十欧姆的差分电阻，所以LD驱动器的输出阻抗可以与传输线的特性阻抗基本上匹配，具有较小的额外功耗。

公开(公告)号：US08242063B2

公开(公告)日：2012-08-14

申请号：US11411487

申请日：2006-04-26

申请人： Yasushi Kawamura ,  Toshiki Satou ,  Keiji Tanaka

发明人： Yasushi Kawamura ,  Toshiki Satou ,  Keiji Tanaka

IPC分类号： C10M169/06 ,  C10M115/04 ,  C10M115/08

CPC分类号： C10M123/04 ,  C10M169/06 ,  C10M2207/1265 ,  C10M2207/1285 ,  C10M2215/0813 ,  C10M2217/0456 ,  C10N2230/06 ,  C10N2240/20 ,  C10N2250/10

摘要： A lubricating grease composition comprising base oil and a blended thickener which comprises, as the thickener constituents, (a) one or more urea-type compounds; (b) one or more fatty acid metal salts; and (c) at least one type of amide compound selected from the group comprised of aliphatic amides and aliphatic bisamides shown by the general formulae (1) and (2): R1CONH2  (1) R1CONHR2NHCOR1  (2) wherein R1 denotes a saturated or unsaturated alkyl group having from 15 to 17 carbon atoms and R2 denotes a methylene group or an ethylene group and wherein the blending weight proportions of (a), (b) and (c) are in the ratio of a/(b+c) is in the range of from 0.20 to 10 wherein (1) constituent (a) has a blending weight ratio in the range of from 1 to 10; (2) constituent (b) has a blending weight ratio in the range of from 0.5 to 2.5; and (3) constituent (c) has a blending weight ratio in the range of from 0.5 to 2.5.

摘要翻译： 一种润滑脂组合物，其包含基础油和共混增稠剂，其包含作为增稠剂组分的（a）一种或多种脲型化合物; （b）一种或多种脂肪酸金属盐; 和（c）至少一种选自由通式（1）和（2）表示的脂族酰胺和脂族双酰胺的酰胺化合物：R1CONH2（1）R1CONHR2NHCOR1（2）其中R1表示饱和或不饱和的 具有15至17个碳原子的烷基，R 2表示亚甲基或亚乙基，并且其中（a），（b）和（c）的混合重量比为a /（b + c） 在0.20至10的范围内，其中（1）组分（a）的共混重量比在1至10的范围内; （2）成分（b）的配合重量比为0.5〜2.5; 和（3）组分（c）的混合重量比在0.5至2.5的范围内。

公开(公告)号：US20110317965A1

公开(公告)日：2011-12-29

申请号：US13255718

申请日：2010-05-12

申请人： Yasushi Fujimura ,  Keiji Tanaka ,  Shunsuke Sato ,  Masaki Migita

发明人： Yasushi Fujimura ,  Keiji Tanaka ,  Shunsuke Sato ,  Masaki Migita

IPC分类号： G02B6/36

CPC分类号： G02B6/421 ,  G02B6/4204

摘要： An optical subassembly (OSA) with a newly arranged optical device is disclosed. The OSA provides a ceramic package that installs a semiconductor optical device, a joint portion welded to a lid of the ceramic package, and an optical coupling portion that receives an external optical fiber. In the OSA, the seal ring put between the top of the multi-layered ceramic package and the lid is isolated from the optical device; accordingly, the lid, the joint portion and the optical coupling portion are electrically isolated from the semiconductor optical device even when the OSA is installed in an optical apparatus such as an optical transceiver.

摘要翻译： 公开了具有新配置的光学装置的光学组件（OSA）。 OSA提供了安装半导体光学器件，焊接到陶瓷封装的盖子的接合部分和接收外部光纤的光耦合部分的陶瓷封装。 在OSA中，放置在多层陶瓷封装的顶部和盖之间的密封环与光学装置隔离; 因此，即使将OSA安装在诸如光收发器的光学装置中，盖，接合部分和光耦合部分也与半导体光学装置电隔离。

公开(公告)号：US07917043B2

公开(公告)日：2011-03-29

申请号：US12642015

申请日：2009-12-18

申请人： Seigo Furudate ,  Keiji Tanaka

发明人： Seigo Furudate ,  Keiji Tanaka

IPC分类号： H04B10/06

CPC分类号： H04B10/66

摘要： The present invention provides an optical receiver that enables to vary the sensitivity depending on the transmission speed. The optical receiver provides a photodiode to generate the photocurrent, the pre-amplifier to convert the photocurrent to the voltage signal, the lead pin to supply the bias voltage to the photodiode, and the control block to generate the switching signal for varying the current-to-voltage conversion efficiency and the frequency bandwidth of the pre-amplifier based on the control signal. The control signal is commonly provided from the lead pin through which the bias voltage is applied. The control block interprets the signal applied to the lead pin and generates the switching signal.

摘要翻译： 本发明提供一种能够根据传输速度改变灵敏度的光接收机。 光接收器提供光电二极管以产生光电流，前置放大器将光电流转换为电压信号，引脚引脚将偏置电压提供给光电二极管，控制块产生开关信号， 基于控制信号的前置放大器的电压转换效率和频率带宽。 控制信号通常由施加偏置电压的引脚引脚提供。 控制块解释施加到引脚引脚的信号并产生开关信号。

公开(公告)号：US07897550B2

公开(公告)日：2011-03-01

申请号：US10870258

申请日：2004-06-17

申请人： Yasushi Kawamura ,  Takumi Matsumoto ,  Kazuhiro Miyajima ,  Tetsuo Nimura ,  Kazushige Ohmura ,  Noriaki Shinoda ,  Keiji Tanaka ,  Takeo Yamamoto

发明人： Yasushi Kawamura ,  Takumi Matsumoto ,  Kazuhiro Miyajima ,  Tetsuo Nimura ,  Kazushige Ohmura ,  Noriaki Shinoda ,  Keiji Tanaka ,  Takeo Yamamoto

IPC分类号： C10M129/40 ,  C10M137/10 ,  C10M159/24 ,  C10M135/18 ,  C10M169/06

CPC分类号： C10M169/06 ,  C10M2207/126 ,  C10M2215/1026 ,  C10M2217/0456 ,  C10M2219/068 ,  C10M2223/047 ,  C10N2210/01 ,  C10N2210/02 ,  C10N2210/03 ,  C10N2210/06 ,  C10N2230/06 ,  C10N2240/046

摘要： Urea grease composition for constant velocity joints is provided containing base oil, one or more urea thickener compounds, (A) one or more molybdenum sulphurized dialkyldithiocarbamates represented by general formula (I) wherein R1 and R2 are independently chosen from alkyl groups of from 1 to 24 carbons, m+n=4, m is from 0 to 3 and n is from 4 to 1, (B) triphenylphosphorothionate represented by formula (II) and (C) one or more stearic acid metal salts.

摘要翻译： 提供了用于等速万向节的尿素润滑脂组合物，其包含基础油，一种或多种脲增稠剂化合物，（A）一种或多种由通式（I）表示的硫化钼硫化二烷基二硫代氨基甲酸酯，其中R 1和R 2独立地选自1至 24个碳，m + n = 4，m为0〜3，n为4〜1，（B）由式（II）表示的三苯基硫代磷酸酯和（C）一种或多种硬脂酸金属盐。

公开(公告)号：US20100283541A1

公开(公告)日：2010-11-11

申请号：US12771025

申请日：2010-04-30

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： H03F3/45

CPC分类号： H03F3/4508 ,  G01R19/16576 ,  H03F2200/78

摘要： A signal level detector is disclosed, in which the noise tolerance of the signal detection is enhanced without increasing power consumption of the circuit. The signal detector includes two amplifiers, whose gain is fixed but different from each other, a switch to select the output of one of the amplifiers, a peak hold to hold the selected output and a comparator to compare the output of the peak hold with the level corresponding to loss-of-signal level. The switch responds to the compared result. In the invention, the two amplifiers have the same arrangement of the trans-conductance amplifier but only the resistance of the emitter coupling resistor is different.

摘要翻译： 公开了一种信号电平检测器，其中增强了信号检测的噪声容限，而不增加电路的功耗。 信号检测器包括两个放大器，其增益是固定的但彼此不同，用于选择放大器之一的输出的开关，用于保持所选输出的峰值保持，以及比较器，用于将峰值保持的输出与 电平对应于信号丢失电平。 开关响应比较结果。 在本发明中，两个放大器具有相同的跨导放大器布置，但只有发射极耦合电阻器的电阻不同。

公开(公告)号：US20100254713A1

公开(公告)日：2010-10-07

申请号：US12752782

申请日：2010-04-01

申请人： Keiji Tanaka

发明人： Keiji Tanaka

IPC分类号： H04B10/04

CPC分类号： H01S5/042 ,  H01S5/0428

摘要： An LD driver to generate an asymmetrical driving current with a relatively faster falling edge and an optical transmitter having the LD driver are disclosed. The LD driver includes a primary driver and the sub-driver connected in parallel to the primary driver. The primary driver converts the input signal or the delayed signal delayed from the input signal into the primary current. The sub-driver generates a symmetrical current tracing the input or the delayed signal, and an asymmetrical current formed by the OR operation between the input and delayed signals. The driving current is formed by adding the primary current, the symmetrical current and the asymmetrical current.

摘要翻译： 公开了一种用于产生具有相对较快下降沿的不对称驱动电流的LD驱动器和具有LD驱动器的光发射器。 LD驱动器包括主驱动器和与主驱动器并联连接的副驱动器。 主驱动器将输入信号或从输入信号延迟的延迟信号转换为初级电流。 子驱动器产生对称电流跟踪输入或延迟信号，以及由输入和延迟信号之间的或运算形成的非对称电流。 通过增加一次电流，对称电流和不对称电流来形成驱动电流。

公开(公告)号：US20090263133A1

公开(公告)日：2009-10-22

申请号：US12065155

申请日：2006-08-30

申请人： Junichi Nakagawa ,  Keiji Tanaka ,  Masato Kuwazuru ,  Noboru Edagawa

发明人： Junichi Nakagawa ,  Keiji Tanaka ,  Masato Kuwazuru ,  Noboru Edagawa

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0069 ,  H04Q2011/009

摘要： In a downstream channel communication, an individual downstream channel wavelength is allocated to each group of user nodes, and for user nodes in a same group, a central office performs a downstream-signal communication by a same communication method using the individual downstream channel wavelength. In an upstream channel communication, all user nodes perform an upstream-signal communication with the central office using a single upstream channel. A downstream signal from the central office is distributed to the groups for each individual downstream channel wavelength, and upstream signals from the user nodes are transmitted to the central office in a multiplexing manner.

摘要翻译： 在下游信道通信中，将各个下行信道波长分配给每组用户节点，并且对于同一组中的用户节点，中心局通过使用各个下游信道波长的相同通信方式执行下行信号通信。 在上游信道通信中，所有用户节点使用单个上游信道执行与中心局的上行信号通信。 来自中心局的下行信号被分配给每个单独下游信道波长的组，并且来自用户节点的上行信号以复用方式发送到中心局。

公开(公告)号：US20090079502A1

公开(公告)日：2009-03-26

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：US20090035151A1

公开(公告)日：2009-02-05

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： F04B49/06 ,  G05D7/00

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。