-
公开(公告)号：US20160301480A1
公开(公告)日：2016-10-13
申请号：US15080970
申请日：2016-03-25
Applicant: FUJITSU LIMITED
Inventor： Satoshi Ide
CPC classification number: H04B10/801 , H04B10/695 , H04L25/062 , H04L27/06
Abstract: A signal decision circuit includes: a first decision circuit configured to identify a voltage level of an input signal using an average level of an amplitude of the input signal as a first threshold level; a detection circuit configured to detect an average of an amplitude absolute level based on the average level of the amplitude; a second decision circuit configured to identify a voltage level of the input signal using a second threshold level obtained by adding the average of the amplitude absolute level to the average level of the amplitude; and a third decision circuit configured to identify a voltage level of the input signal using a third threshold level obtained by subtracting the average of the amplitude absolute level from the average level of the amplitude.
Abstract translation: 信号判定电路包括：第一判定电路，被配置为使用输入信号的幅度的平均电平作为第一阈值电平来识别输入信号的电压电平; 检测电路，被配置为基于所述幅度的平均电平来检测幅度绝对电平的平均值; 第二判定电路，被配置为使用通过将幅度绝对电平的平均值与幅度的平均电平相加而获得的第二阈值来识别输入信号的电压电平; 以及第三判定电路，被配置为使用通过从所述幅度的平均电平中减去所述幅度绝对电平的平均值而获得的第三阈值来识别所述输入信号的电压电平。
-
公开(公告)号：US20140103719A1
公开(公告)日：2014-04-17
申请号：US14023814
申请日：2013-09-11
Applicant: FUJITSU LIMITED
Inventor： Mariko Kase , Satoshi Ide
IPC: H02J4/00
CPC classification number: H02J4/00 , H05B33/0812 , Y02B20/345 , Y10T307/406
Abstract: A drive circuit that drives a light emitting element coupled to a first output terminal of a differential circuit, the drive circuit includes: a dummy load provided at a second output terminal of the differential circuit, a resistor coupled between the first output terminal and the second output terminal, two transistors coupled to a voltage source and applying a current to the light emitting element and the dummy load, and a comparative amplifying circuit having a non-inverting input terminal coupled to a reference voltage, an inverting input terminal coupled to at least the first output terminal of the differential circuit via a resistor, and an output terminal coupled to gates of the two transistors.
Abstract translation: 一种驱动电路，其驱动耦合到差分电路的第一输出端的发光元件，所述驱动电路包括：设置在所述差分电路的第二输出端的虚拟负载，耦合在所述第一输出端和所述第二输出端之间的电阻器 输出端子，耦合到电压源的两个晶体管和向发光元件和虚拟负载施加电流，以及具有耦合到参考电压的非反相输入端的比较放大电路，至少耦合到反相输入端 经由电阻器的差分电路的第一输出端子和耦合到两个晶体管的栅极的输出端子。
-
公开(公告)号：US09774334B2
公开(公告)日：2017-09-26
申请号：US15263430
申请日：2016-09-13
Applicant: FUJITSU LIMITED
Inventor： Satoshi Ide
CPC classification number: H03L7/0807 , H03L7/08 , H03L7/0891 , H03L7/099 , H04B10/25 , H04B10/616 , H04L7/0075 , H04L7/0091 , H04L7/033
Abstract: A VCO generates a clock signal. A phase and frequency detector compares phases and frequencies of the clock signal generated by the VCO and an input signal. A charge pump adjusts a control voltage of the VCO based on an output of the phase and frequency detector. An identical digit detector generates a first signal by delaying a rising timing of the input signal by a first time, generates a second signal by delaying a falling timing of the input signal by a second time, detects succession of identical digits in the input signal based on the first signal and the second signal, and stops adjustment of the control voltage by the charge pump when the identical digits succeed by a predetermined number of identical digits or more.
-
公开(公告)号：US20170104492A1
公开(公告)日：2017-04-13
申请号：US15263430
申请日：2016-09-13
Applicant: FUJITSU LIMITED
Inventor： Satoshi Ide
CPC classification number: H03L7/0807 , H03L7/08 , H03L7/0891 , H03L7/099 , H04B10/25 , H04B10/616 , H04L7/0075 , H04L7/0091 , H04L7/033
Abstract: A VCO generates a clock signal. A phase and frequency detector compares phases and frequencies of the clock signal generated by the VCO and an input signal. A charge pump adjusts a control voltage of the VCO based on an output of the phase and frequency detector. An identical digit detector generates a first signal by delaying a rising timing of the input signal by a first time, generates a second signal by delaying a falling timing of the input signal by a second time, detects succession of identical digits in the input signal based on the first signal and the second signal, and stops adjustment of the control voltage by the charge pump when the identical digits succeed by a predetermined number of identical digits or more.
-
5.发明授权Optical transmission system, control signal transmission method, and optical module 有权光传输系统，控制信号传输方式和光模块公开(公告)号：US09088366B2
公开(公告)日：2015-07-21
申请号：US13954396
申请日：2013-07-30
Applicant: FUJITSU LIMITED
Inventor： Jun Matsui , Takatoshi Yagisawa , Tsuyoshi Yamamoto , Satoshi Ide
IPC: H04B10/12 , H04B10/00 , H04B10/27 , H04B10/073
CPC classification number: H04B10/27 , H04B10/073
Abstract: An optical transmission system including a transmitting unit to transmit an optical main signal, a receiving unit to receive the optical main signal, and a transmission line through which the optical main signal is transmitted, the optical transmission system includes: an optical transmitter unit configured to be activated or inactivated based on a control signal so as to transmit the control signal, the optical transmitter being included in the transmitting; and an optical receiver configured to receive light with the activate state or the inactivate state of the optical transmitter the optical receiver being included in the receiving unit, wherein the receiving unit regenerates the control signal, based on a power of the received light.
Abstract translation: 一种光传输系统，包括发送光主信号的发送单元，接收光主信号的接收单元和发送所述光主信号的传输线，所述光传输系统包括：光发射单元，被配置为 基于控制信号被激活或非激活，以便发送所述控制信号，所述光发射机包括在所述发射中; 以及光接收器，被配置为接收具有所述光发射机的激活状态或灭活状态的光，所述光接收器包括在所述接收单元中，其中，所述接收单元基于所接收的光的功率再生所述控制信号。
-
Patent Agency Ranking
公开(公告)号：US20130071106A1
公开(公告)日：2013-03-21
申请号：US13646388
申请日：2012-10-05
Applicant: FUJITSU LIMITED
Inventor： Yukito TSUNODA , Satoshi Ide , Shinichi Sakuramoto , Kazuyuki Mori , Toru Matsuyama
IPC: H04B10/08
CPC classification number: H04B10/6931 , H01L31/02027 , H04B10/6911
Abstract: In an optical receiver, a light receiving element receives the optical packet signals and converts the optical packet signals to electrical signals. A bias voltage supply section supplies bias voltage to the light receiving element. A monitoring section monitors an input level of each optical packet signal or each electrical signal and transmits a monitored value to the bias voltage supply section. In addition, the bias voltage supply section temporarily increases the bias voltage according to magnitude of the monitored value after an end of receiving of each optical packet signal.
Abstract translation: 在光接收器中，光接收元件接收光分组信号，并将光分组信号转换为电信号。 偏置电压供应部分向受光元件提供偏置电压。 监视部分监视每个光分组信号或每个电信号的输入电平，并将监测值发送到偏置电压提供部分。 此外，偏置电压提供部分在每个光分组信号的接收结束之后根据监视值的大小临时增加偏置电压。
-
公开(公告)号：US09647772B2
公开(公告)日：2017-05-09
申请号：US15080970
申请日：2016-03-25
Applicant: FUJITSU LIMITED
Inventor： Satoshi Ide
CPC classification number: H04B10/801 , H04B10/695 , H04L25/062 , H04L27/06
Abstract: A signal decision circuit includes: a first decision circuit configured to identify a voltage level of an input signal using an average level of an amplitude of the input signal as a first threshold level; a detection circuit configured to detect an average of an amplitude absolute level based on the average level of the amplitude; a second decision circuit configured to identify a voltage level of the input signal using a second threshold level obtained by adding the average of the amplitude absolute level to the average level of the amplitude; and a third decision circuit configured to identify a voltage level of the input signal using a third threshold level obtained by subtracting the average of the amplitude absolute level from the average level of the amplitude.
-
公开(公告)号：US09570917B2
公开(公告)日：2017-02-14
申请号：US14023814
申请日：2013-09-11
Applicant: FUJITSU LIMITED
Inventor： Mariko Kase , Satoshi Ide
CPC classification number: H02J4/00 , H05B33/0812 , Y02B20/345 , Y10T307/406
Abstract: A drive circuit that drives a light emitting element coupled to a first output terminal of a differential circuit, the drive circuit includes: a dummy load provided at a second output terminal of the differential circuit, a resistor coupled between the first output terminal and the second output terminal, two transistors coupled to a voltage source and applying a current to the light emitting element and the dummy load, and a comparative amplifying circuit having a non-inverting input terminal coupled to a reference voltage, an inverting input terminal coupled to at least the first output terminal of the differential circuit via a resistor, and an output terminal coupled to gates of the two transistors.
Abstract translation: 一种驱动电路，其驱动耦合到差分电路的第一输出端的发光元件，所述驱动电路包括：设置在所述差分电路的第二输出端的虚拟负载，耦合在所述第一输出端和所述第二输出端之间的电阻器 输出端子，耦合到电压源的两个晶体管和向发光元件和虚拟负载施加电流，以及具有耦合到参考电压的非反相输入端的比较放大电路，至少耦合到反相输入端 经由电阻器的差分电路的第一输出端子和耦合到两个晶体管的栅极的输出端子。
-
公开(公告)号：US09083467B2
公开(公告)日：2015-07-14
申请号：US13669957
申请日：2012-11-06
Applicant: FUJITSU LIMITED
Inventor： Satoshi Ide , Tadashi Ikeuchi
CPC classification number: H04B10/40
Abstract: An optical transmission apparatus includes an optical transmitter that includes a light emitting element and a driver circuit for the light emitting element, a temperature sensor that detects a temperature of the optical transmitter, and a controller that switches an operation mode of the optical transmitter from a normal mode to a low-power mode so as to reduce a heating effect to the light emitting element and allow an operation of the light emitting element to continue when the temperature detected by the temperature sensor is equal to or higher than a given temperature.
Abstract translation: 光传输装置包括光发射机，其包括发光元件和用于发光元件的驱动电路，温度传感器，其检测光发射器的温度;以及控制器，其将光发射器的操作模式从 正常模式到低功率模式，以便当由温度传感器检测到的温度等于或高于给定温度时，减少对发光元件的加热效应并且允许发光元件的操作继续。
-
公开(公告)号：US09525386B2
公开(公告)日：2016-12-20
申请号：US14666836
申请日：2015-03-24
Applicant: FUJITSU LIMITED
Inventor： Satoshi Ide , Hideki Oku
CPC classification number: H03F1/3211 , H03F3/087 , H03F3/45475 , H03F2200/129 , H03F2203/45114 , H03F2203/45116 , H04B10/60 , H04B10/69
Abstract: A receiver circuit includes a first amplifier circuit to differentially amplify differential input signals by a linear operation, a second amplifier circuit configured to differentially amplify output differential signals of the first amplifier circuit by a limiting operation, a feedback circuit, first and second resistors coupled between the feedback circuit and outputs of the first amplifier circuit, and third and fourth resistors coupled between the feedback circuit and outputs of the second amplifier circuit. The feedback circuit amplifies a positive-phase signal that is output from a positive-phase output node thereof coupled to the first and third resistors, and a negative-phase signal that is output from a negative-phase output node thereof coupled to the second and fourth resistors, and feeds back a feedback signal after amplification to the first amplifier circuit.
Abstract translation: 接收器电路包括：第一放大器电路，用于通过线性操作差分放大差分输入信号;第二放大器电路，被配置为通过限制操作差分放大第一放大器电路的输出差分信号;反馈电路，耦合在第一和第二电阻之间的第一和第二电阻器 反馈电路和第一放大器电路的输出以及耦合在反馈电路和第二放大器电路的输出之间的第三和第四电阻器。 反馈电路放大从其耦合到第一和第三电阻器的正相输出节点输出的正相信号，以及从耦合到第二和第二电阻器的负相输出节点输出的负相位信号， 第四电阻器，并且将放大后的反馈信号反馈到第一放大器电路。
-
-
-
-
-
-
-
-
-
Search Results
13
records
(took 0.017 seconds)
