公开(公告)号：US09094134B2

公开(公告)日：2015-07-28

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： H04B10/69 ,  H03G3/30

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：US08155535B2

公开(公告)日：2012-04-10

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： An optical receiver for stably reproducing packets having different light receiving levels is disclosed. The optical receiver includes: a light receiving element for outputting a current in response to a light receiving level of an optical signal; a preamplifier for converting the current signal outputted from the light receiving element into a voltage signal; a circuit 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 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 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： 公开了一种用于稳定再现具有不同光接收电平的分组的光接收机。 光接收器包括：用于响应于光信号的光接收电平输出电流的光接收元件; 用于将从光接收元件输出的电流信号转换为电压信号的前置放大器; 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相同的二进制符号部分的电路，以响应其检测结果输出时间常数切换信号; 电平检测电路，用于基于响应于时间常数切换信号而被切换/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，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：US09450542B2

公开(公告)日：2016-09-20

申请号：US14413483

申请日：2013-01-16

申请人： Daisuke Mita ,  Masaki Noda ,  Masamichi Nogami

发明人： Daisuke Mita ,  Masaki Noda ,  Masamichi Nogami

IPC分类号： H03F3/08 ,  H03G3/30

CPC分类号： H03F3/08 ,  H03G3/3084

摘要： A current bypass circuit that passes part of a photocurrent output from a photodetector is connected to an input terminal of a current-to-voltage conversion amplifier circuit. A voltage obtained by level conversion of an output voltage by a voltage level conversion circuit is input into the current bypass circuit so that the current bypass circuit is turned on at a photocurrent that is smaller than the photocurrent at which a diode connected in parallel to a feedback resistor of the current-to-voltage conversion amplifier circuit is turned on. Consequently, the current-to-voltage conversion gain is switched in three stages according to the intensity of the photocurrent corresponding to an optical signal level.

摘要翻译： 将来自光电检测器的光电流输出的一部分的电流旁路电路连接到电流 - 电压转换放大器电路的输入端。 通过电压电平转换电路对输出电压进行电平转换而获得的电压被输入到电流旁路电路中，使得电流旁路电路以小于并联到二极管的二极管的光电流的光电流导通 电流 - 电压转换放大器电路的反馈电阻器被接通。 因此，根据与光信号电平对应的光电流的强度，电流 - 电压转换增益分三级切换。

公开(公告)号：US08831059B2

公开(公告)日：2014-09-09

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 ,  H01S5/042 ,  H04B10/50 ,  H01S5/062

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动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：US08254783B2

公开(公告)日：2012-08-28

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：US07924076B2

公开(公告)日：2011-04-12

申请号：US12377081

申请日：2006-09-04

申请人： Naoki Suzuki ,  Hitoyuki Tagami ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Naoki Suzuki ,  Hitoyuki Tagami ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H03L7/06

CPC分类号： H04L7/0338 ,  H04L7/04

摘要： Provided is a data recovery circuit including an input data phase detection circuit for outputting a gate signal synchronized with a rising phase of input data, a gated multiphase oscillator for instantly generating N-phase clocks based on the gate signal as a trigger, data discriminating and reproducing circuits for outputting sampled data of the input data which are synchronized with the clocks, a continuous clock generation circuit for generating a continuous clock which is a reference clock, continuous clock synchronization circuits for synchronizing the sampled data with the continuous clock and outputting the synchronized sampled data as phase synchronization data, and a phase selector for selecting the phase synchronization data having an optimum discrimination phase with the largest phase margin with respect to the input data and outputting the selected phase synchronization data as recovery data.

摘要翻译： 提供了一种数据恢复电路，包括输入数据相位检测电路，用于输出与输入数据的上升相位同步的门信号，门控多相振荡器，用于基于门信号作为触发立即产生N相时钟，数据识别和 用于输出与时钟同步的输入数据的采样数据的再现电路，用于产生作为参考时钟的连续时钟的连续时钟产生电路，用于使采样数据与连续时钟同步的连续时钟同步电路，并输出同步 采样数据作为相位同步数据，以及相位选择器，用于相对于输入数据选择具有最大相位裕度的最佳鉴别相位的相位同步数据，并输出所选择的相位同步数据作为恢复数据。

公开(公告)号：US07598479B2

公开(公告)日：2009-10-06

申请号：US10566240

申请日：2003-07-30

申请人： Masamichi Nogami ,  Masaki Noda ,  Hitoyuki Tagami ,  Kuniaki Motoshima

发明人： Masamichi Nogami ,  Masaki Noda ,  Hitoyuki Tagami ,  Kuniaki Motoshima

IPC分类号： H03F3/08

CPC分类号： H03G3/3084 ,  H03F3/08 ,  H03G1/0047 ,  H03G2201/103 ,  H03G2201/502 ,  H04B10/69

摘要： A gain switching circuit switches a conversion gain of a preamplifier that is configured with a series circuit formed with a first resistor and a first switching element and a series circuit formed with a second resistor and a second switching element respectively connected in parallel with a feedback resistor. The gain switching circuit includes a first operating unit that generates a first switching element operating signal for closing the first switching element within a first gain switching period, and a second operating unit that generates a second switching element operating signal for closing the second switching element within a second gain switching period.

摘要翻译： 增益切换电路切换配置有由第一电阻器和第一开关元件形成的串联电路的前置放大器的转换增益，以及与分别与反馈电阻并联连接的第二电阻器和第二开关元件形成的串联电路 。 增益切换电路包括第一操作单元，其在第一增益切换周期内产生用于闭合第一开关元件的第一开关元件操作信号，以及第二操作单元，其产生用于闭合第二开关元件的第二开关元件操作信号 第二增益切换周期。

公开(公告)号：US5821814A

公开(公告)日：1998-10-13

申请号：US768285

申请日：1996-12-17

申请人： Masatoshi Katayama ,  Masamichi Nogami ,  Kuniaki Motoshima

发明人： Masatoshi Katayama ,  Masamichi Nogami ,  Kuniaki Motoshima

IPC分类号： H03G3/20 ,  H03F3/08 ,  H03G1/00 ,  H03G3/30 ,  H03G7/08 ,  H03F1/34

CPC分类号： H03F1/342 ,  H03F3/082 ,  H03G1/00 ,  H03G1/0023 ,  H03G3/3084 ,  H03G7/08

摘要： A negative feedback preamplifier having variable conversion gain control and variable open loop gain control capabilities which can work correctly regardless of semiconductor process variations. The negative feedback preamplifier used to convert an input signal current to a signal in the form of voltage includes: a resistor which determines the current-voltage conversion gain when a small signal current is input to the negative feedback preamplifier; a diode which switches the current-voltage conversion gain when a large signal current is input to the negative feedback preamplifier; a resistor which determines the current-voltage conversion gain when the large signal current is input; a grounded source amplifier including a main FET which is biased such that its transconductance decreases when the large signal current is input; and a bias setting portion (diode) which determines the bias condition associated with the main FET.

摘要翻译： 具有可变转换增益控制和可变开环增益控制能力的负反馈前置放大器，无论半导体工艺变化如何，它都能正常工作。 用于将输入信号电流转换为电压形式的信号的负反馈前置放大器包括：当将小信号电流输入到负反馈前置放大器时确定电流 - 电压转换增益的电阻器; 当大信号电流被输入到负反馈前置放大器时，将电流 - 电压转换增益切换的二极管; 当输入大信号电流时确定电流 - 电压转换增益的电阻器; 一个接地的源极放大器，包括一个主FET，该主FET被偏压使得当大信号电流被输入时它的跨导减小; 以及偏置设置部分（二极管），其确定与主FET相关联的偏置条件。

公开(公告)号：US09722545B2

公开(公告)日：2017-08-01

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： H03F3/45 ,  H03F1/02 ,  H03F3/21 ,  H03F3/19 ,  H03G3/30 ,  H03F1/42 ,  H03F3/191 ,  H03G9/24

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.

公开(公告)号：US09252887B2

公开(公告)日：2016-02-02

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： H04B10/06 ,  H04B10/08 ,  H04B17/00 ,  H01J40/14 ,  H01F3/08 ,  H04B10/60 ,  H04B10/27 ,  H04J14/08

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。