公开(公告)号：US20150381115A1

公开(公告)日：2015-12-31

申请号：US14767983

申请日：2013-03-04

申请人： Satoshi YOSHIMA ,  Masaki NODA ,  Masamichi NOGAMI

发明人： Satoshi YOSHIMA ,  Masaki NODA ,  Masamichi NOGAMI

IPC分类号： H03F1/02 ,  H03F3/19 ,  H03G3/30 ,  H03F3/45

CPC分类号： H03F1/0288 ,  H03F1/42 ,  H03F3/19 ,  H03F3/191 ,  H03F3/211 ,  H03F3/45098 ,  H03F2203/45038 ,  H03F2203/45296 ,  H03F2203/45298 ,  H03F2203/45372 ,  H03F2203/45374 ,  H03F2203/45396 ,  H03F2203/45494 ,  H03F2203/45594 ,  H03G3/3036 ,  H03G9/24

摘要： Provided is an emphasis circuit capable of obtaining a desired emphasis amount with which waveform deterioration of an output signal in a high frequency band (high frequency band deterioration) is suppressed without increasing power consumption (current consumption). In the emphasis circuit, a baseband amplifier section and a peaking amplifier section are connected in parallel to each other, and respective drive current setting sections are adjusted to adjust respective drive current values thereof so that the sum of the drive current value of the baseband amplifier section and the drive current value of the peaking amplifier section may be constant.

摘要翻译： 提供一种能够获得在不增加功耗（电流消耗）的情况下抑制高频带（高频带劣化）中的输出信号的波形恶化的期望的强调量的加强电路。 在加重电路中，基带放大器部分和峰化放大器部分彼此并联连接，并且调节相应的驱动电流设置部分以调节其驱动电流值，使得基带放大器的驱动电流值之和 峰值放大器部分的驱动电流值可以是恒定的。

公开(公告)号：US08165478B2

公开(公告)日：2012-04-24

申请号：US12516574

申请日：2006-12-21

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/06

CPC分类号： H03G3/3084 ,  H04B10/6931 ,  H04B10/695

摘要： An optical receiver of wide-dynamic range characteristic that stably reproduces a burst signal having different light receiving levels. A preamplifier converts an output from a light receiving element into a voltage signal. A level detecting circuit includes: a first level detecting unit having a shorter time constant; and a second level detecting unit having a longer time constant and switching over to any of the level detecting units in response to a time constant switching signal to detect a voltage level of an output voltage signal output from the preamplifier. An amplifier variably controls conversion gain of the preamplifier based on the detecting result. A time constant switching control outputs the time constant switching signal to the level detecting unit based on the output voltage signal from the preamplifier, to select the first level detecting unit or the second detecting unit based on a number of consecutive identical digits being equal to, smaller, or larger than the predetermined number.

摘要翻译： 具有宽动态范围特性的光接收机，其稳定地再现具有不同光接收电平的脉冲串信号。 前置放大器将来自光接收元件的输出转换成电压信号。 电平检测电路包括：具有较短时间常数的第一电平检测单元; 以及具有较长时间常数的第二电平检测单元，并且响应于时间常数切换信号切换到任何电平检测单元，以检测从前置放大器输出的输出电压信号的电压电平。 放大器基于检测结果可变地控制前置放大器的转换增益。 时间常数切换控制基于来自前置放大器的输出电压信号将时间常数切换信号输出到电平检测单元，基于等于的连续相同数字的数量来选择第一电平检测单元或第二检测单元， 小于或大于预定数量。

公开(公告)号：US07609980B2

公开(公告)日：2009-10-27

申请号：US10585458

申请日：2005-09-28

申请人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

发明人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

IPC分类号： H04B10/06

CPC分类号： H04L25/061 ,  H03G3/3084 ,  H04B10/6931 ,  H04B10/695

摘要： A first average detecting circuit detects an average of output signals of a pre-amplifying unit that controls an amplification gain based on a result of comparison between an output of the first average detecting circuit and a predetermined reference voltage. A discriminating circuit receives an output signal of the pre-amplifying unit as an input signal and performs a signal discrimination of the input signal based on a threshold. A second average detecting circuit detects an average of input signals to the discriminating circuit. The discriminating circuit receives an output of the second average detecting circuit as the threshold.

摘要翻译： 第一平均检测电路基于第一平均检测电路的输出与预定参考电压之间的比较结果来检测控制放大增益的预放大单元的输出信号的平均值。 识别电路接收预放大单元的输出信号作为输入信号，并且基于阈值执行输入信号的信号鉴别。 第二平均检测电路检测到鉴别电路的输入信号的平均值。 识别电路接收第二平均检测电路的输出作为阈值。

公开(公告)号：US20090252504A1

公开(公告)日：2009-10-08

申请号：US12086292

申请日：2006-03-03

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/06

CPC分类号： H03F3/08 ,  H03G3/001 ,  H03G3/3084 ,  H04B10/6931

摘要： Provided is an optical receiver which has a wide dynamic range characteristic for stably reproducing packets having different light receiving levels, and which is superior in high-speed responsiveness and consecutive same binary symbols tolerance.The optical receiver includes: a light receiving element 1 for outputting a current in response to a light receiving level of an optical signal; a preamplifier 2 whose gain is controlled in a variable manner based upon a control voltage, for converting the current signal outputted from the light receiving element into a voltage signal; a consecutive same binary symbols detecting circuit 5 for detecting a consecutive same binary symbols portion from a binary symbols stream of the voltage signal outputted from the preamplifier to output a time constant switching signal in response to a detection result thereof; a level detecting circuit 3 for detecting a voltage level of the voltage signal outputted from the preamplifier based upon a time constant which is switched/controlled in response to the time constant switching signal; and an amplifier 4 for amplifying an output voltage of the level detecting circuit to apply a control voltage for controlling the gain to the preamplifier.

摘要翻译： 提供了一种具有宽动态范围特性的光接收机，用于稳定地再现具有不同光接收电平的分组，并且其具有优异的高速响应性和连续相同的二进制符号容限。 光接收器包括：光接收元件1，用于响应光信号的光接收电平输出电流; 基于控制电压以可变方式控制增益的前置放大器2，用于将从光接收元件输出的电流信号转换为电压信号; 连续相同的二进制符号检测电路5，用于从前置放大器输出的电压信号的二进制符号流检测连续的相同的二进制符号部分，以响应其检测结果输出时间常数切换信号; 电平检测电路3，用于基于根据时间常数切换信号切换/控制的时间常数来检测从前置放大器输出的电压信号的电压电平; 以及放大器4，用于放大电平检测电路的输出电压，以将用于控制增益的控制电压施加到前置放大器。

公开(公告)号：US20130343769A1

公开(公告)日：2013-12-26

申请号：US14003139

申请日：2011-04-05

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/60

CPC分类号： H04B10/6931 ,  H03G3/3084 ,  H04B10/693

摘要： An optical receiver including: a preamplifier capable of changing a conversion gain in accordance with a reception level of a received burst signal; a gain control circuit capable of switching between a fast time constant and a slow time constant; and a convergence determination circuit for outputting a time constant switching signal in accordance with a state of the gain control circuit (transient state or steady state) and a reset signal between the burst signals. This configuration can switch the time constant of the gain control circuit at an appropriate timing.

摘要翻译： 一种光接收机，包括：前置放大器，其能够根据接收到的突发信号的接收电平来改变转换增益; 能够在快速时间常数和慢时间常数之间切换的增益控制电路; 和用于根据增益控制电路的状态（瞬态或稳态）输出时间常数切换信号和突发信号之间的复位信号的会聚判定电路。 该配置可以在适当的时刻切换增益控制电路的时间常数。

公开(公告)号：US20130308669A1

公开(公告)日：2013-11-21

申请号：US13983879

申请日：2011-02-07

申请人： Masamichi Nogami ,  Satoshi Yoshima ,  Junichi Nakagawa

发明人： Masamichi Nogami ,  Satoshi Yoshima ,  Junichi Nakagawa

IPC分类号： H01S5/00

CPC分类号： H01S5/0085 ,  H01S5/0427 ,  H01S5/06226 ,  H04B10/504

摘要： A laser diode drive circuit includes a laser diode (LD), a modulation-current differential drive circuit, a bias-current differential drive circuit, a first inductance connected between an anode of the LD and a positive power source, a second inductance connected between a cathode of the LD and a negative-phase output terminal of the bias-current differential drive circuit, a first resistor connected to a connection point of the anode of the LD and the first inductance and connected to a negative-phase output terminal of the modulation-current differential drive circuit, and a second resistor connected to a connection point of the cathode of the LD and the second inductance and connected to a positive-phase output terminal of the modulation-current differential drive circuit, and a positive-phase output terminal of the bias-current differential drive circuit is connected to the connection point.

摘要翻译： 激光二极管驱动电路包括激光二极管（LD），调制电流差分驱动电路，偏置电流差分驱动电路，连接在LD的阳极和正电源之间的第一电感， LD的阴极和偏置电流差分驱动电路的负相输出端子，连接到LD的阳极的连接点和第一电感的第一电阻器，并连接到所述偏置电流差动驱动电路的负相输出端子 调制电流差分驱动电路和连接到LD的阴极和第二电感的连接点并连接到调制电流差分驱动电路的正相输出端的第二电阻器，以及正相输出端 偏置电流差动驱动电路的端子连接到连接点。

公开(公告)号：US20100189436A1

公开(公告)日：2010-07-29

申请号：US12664678

申请日：2007-07-18

申请人： Junichi Nakagawa ,  Masamichi Nogami

发明人： Junichi Nakagawa ,  Masamichi Nogami

IPC分类号： H04J14/02

CPC分类号： H04B10/272 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0279 ,  H04J14/0282

摘要： Provided is a point-to-multipoint optical communication system capable of extending a transmission distance between a subscriber apparatus and a station apparatus without changing wavelengths of an upstream optical signal and a downstream optical signal, which are used in both of the apparatuses. The point-to-multipoint optical communication system includes, as a basic configuration thereof, an optical network for connecting one station apparatus (1) to a plurality of (n) subscriber apparatuses (4). Among m basic configurations, one station-side wavelength multiplexer/demultiplexer (22), one optical fiber transmission line (30), and one subscriber-side wavelength multiplexer/demultiplexer (12) are shared. The point-to-multipoint optical communication system further includes a station-side repeating unit (20) and a subscriber-side repeating unit (10) each including the one wavelength multiplexer/demultiplexer (22 or 12) and m wavelength converters (21 or 11). An optical signal having a conventionally-used wavelength is used between the station apparatus (1) and the station-side repeating unit (20) and between the subscriber apparatus (4) and the subscriber-side repeating unit (10), and an extensible optical signal, on which wavelength division multiplexing has been performed, is used between the wavelength multiplexers/demultiplexers (12 and 22) via the optical fiber transmission line (30).

摘要翻译： 提供了能够在不改变在两个装置中使用的上游光信号和下行光信号的波长的情况下扩展用户装置与站装置之间的传输距离的点对多点光通信系统。 点对多点光通信系统作为其基本配置包括用于将一个站设备（1）连接到多个（n）个用户设备（4）的光网络。 在m个基本配置中，共享一个站侧波长多路复用器/解复用器（22），一个光纤传输线（30）和一个用户侧波长复用器/解复用器（12）。 点对多点光通信系统还包括站侧重复单元（20）和用户侧重复单元（10），每个重复单元包括一个波长多路复用器/解复用器（22或12）和m个波长转换器（21或 11）。 在站设备（1）和站侧重复单元（20）之间以及用户设备（4）和用户侧重复单元（10）之间使用具有传统使用波长的光信号，并且可扩展 通过光纤传输线（30）在波分多路复用器/解复用器（12和22）之间使用已进行波分复用的光信号。

公开(公告)号：US20070098416A1

公开(公告)日：2007-05-03

申请号：US10585458

申请日：2005-09-28

申请人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

发明人： Masamichi Nogami ,  Junichi Nakagawa ,  Masaki Noda ,  Toyoaki Uo

IPC分类号： H04B10/06

CPC分类号： H04L25/061 ,  H03G3/3084 ,  H04B10/6931 ,  H04B10/695

摘要： A first average detecting circuit detects an average of output signals of a pre-amplifying unit that controls an amplification gain based on a result of comparison between an output of the first average detecting circuit and a predetermined reference voltage. A discriminating circuit receives an output signal of the pre-amplifying unit as an input signal and performs a signal discrimination of the input signal based on a threshold. A second average detecting circuit detects an average of input signals to the discriminating circuit. The discriminating circuit receives an output of the second average detecting circuit as the threshold.

摘要翻译： 第一平均检测电路基于第一平均检测电路的输出与预定参考电压之间的比较结果来检测控制放大增益的预放大单元的输出信号的平均值。 识别电路接收预放大单元的输出信号作为输入信号，并且基于阈值执行输入信号的信号鉴别。 第二平均检测电路检测到鉴别电路的输入信号的平均值。 识别电路接收第二平均检测电路的输出作为阈值。

公开(公告)号：US06989717B2

公开(公告)日：2006-01-24

申请号：US10477945

申请日：2002-12-03

申请人： Masamichi Nogami ,  Kuniaki Motoshima

发明人： Masamichi Nogami ,  Kuniaki Motoshima

IPC分类号： H03F3/08

CPC分类号： H03G3/3084 ,  H03F3/087 ,  H03F2200/78 ,  H04B10/695

摘要： A pre-amplifier amplifies an output current of a photodetector that converts a burst optical signal into an electrical signal, and outputs an electric voltage signal. A gain switching circuit is connected with a serial circuit comprising a resistor and a switch and a serial circuit comprising a resistor and a switch, in parallel with a feedback resistor. The gain switching circuit includes an arrangement to receive the electric voltage signal output from the pre-amplifier, close the switch at a specific bit position, close the switch at the other specific bit position, upon occurrence of a situation that the switch is to be closed, provided that the switch is closed.

摘要翻译： 前置放大器放大将突发光信号转换为电信号的光检测器的输出电流，并输出电压信号。 增益切换电路与包括电阻器和开关的串联电路和包括与反馈电阻并联的电阻器和开关的串联电路连接。 增益切换电路包括用于接收从前置放大器输出的电压信号的装置，在特定位位置闭合开关，在发生开关的情况下在另一特定位位置闭合开关 关闭，只要开关闭合。

公开(公告)号：US20150295659A1

公开(公告)日：2015-10-15

申请号：US14354293

申请日：2012-01-25

申请人： Masamichi Nogami ,  Satoshi Yoshima ,  Masaki Noda ,  Junichi Nakagawa

发明人： Masamichi Nogami ,  Satoshi Yoshima ,  Masaki Noda ,  Junichi Nakagawa

IPC分类号： H04B10/60 ,  H04J14/08 ,  H04B10/27

CPC分类号： H04B10/60 ,  H03F3/08 ,  H04B10/07955 ,  H04B10/27 ,  H04B10/272 ,  H04B10/69 ,  H04J14/08

摘要： An optical receiver includes a light receiving element configured to convert an input light signal into an electric current, a current mirror circuit including a reference current side transistor and a mirror current side transistor, the transistor being connected to the light receiving element, a current-voltage conversion circuit configured to convert an output current from the transistor into a voltage and output the voltage as a light reception level monitor voltage of the light receiving element, and a current sink circuit connected to the transistor and configured to feed an electric current to the transistor.

摘要翻译： 一种光接收器包括被配置为将输入光信号转换为电流的光接收元件，包括参考电流侧晶体管和反射镜电流侧晶体管的电流镜电路，该晶体管连接到光接收元件， 电压转换电路，被配置为将来自晶体管的输出电流转换为电压，并将作为光接收元件的光接收电平监视电压的电压输出;以及连接到晶体管并被配置为将电流馈送到 晶体管。