公开(公告)号：US5818620A

公开(公告)日：1998-10-06

申请号：US757625

申请日：1996-11-27

申请人： Yo Akimoto ,  Norio Nagase ,  Yoshihiro Saito ,  Kakuji Inoue ,  Hiroyuki Nobuhara ,  Kazuyuki Mori

发明人： Yo Akimoto ,  Norio Nagase ,  Yoshihiro Saito ,  Kakuji Inoue ,  Hiroyuki Nobuhara ,  Kazuyuki Mori

IPC分类号： H03K5/08 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/27 ,  H04B10/272 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H04B10/66 ,  H04L25/03 ,  H04L25/06 ,  H04B10/06

CPC分类号： H04B10/695

摘要： A burst optical signal receiver receives optical signals produced in a burst form from a predetermined subscribers. This burst optical signal receiver comprises an identifying circuit for comparing the input level of an input optical signal with a predetermined threshold value to identify the input level; a peak detector for detecting and holding the peak value of the input optical signal; a DC feedback circuit for acquiring the DC level of an output of the identifying circuit; and a circuit for producing the predetermined threshold value from the DC level from the DC feedback circuit and the peak value held in the peak detector and supplying the predetermined threshold value to the identifying circuit. The peak detector has a plurality of peak detection sections having different gains and operational dynamic ranges and causes those peak detection sections to operate in accordance with the input level of the input optical signal.

摘要翻译： 突发光信号接收机接收从预定用户以突发形式产生的光信号。 该突发光信号接收机包括用于将输入光信号的输入电平与预定阈值进行比较的识别电路，以识别输入电平; 用于检测和保持输入光信号的峰值的峰值检测器; DC反馈电路，用于获取识别电路的输出的DC电平; 以及用于从DC反馈电路的DC电平和保持在峰值检测器中的峰值产生预定阈值的电路，并将该预定阈值提供给识别电路。 峰值检测器具有多个具有不同增益和操作动态范围的峰值检测部分，并且使得这些峰值检测部分根据输入光信号的输入电平进行操作。

公开(公告)号：US5994941A

公开(公告)日：1999-11-30

申请号：US757624

申请日：1996-11-27

申请人： Yo Akimoto ,  Norio Nagase ,  Yoshihiro Saito ,  Kakuji Inoue ,  Hiroyuki Nobuhara ,  Kazuyuki Mori

发明人： Yo Akimoto ,  Norio Nagase ,  Yoshihiro Saito ,  Kakuji Inoue ,  Hiroyuki Nobuhara ,  Kazuyuki Mori

IPC分类号： H03F1/30 ,  H03F3/34 ,  H03L5/00

CPC分类号： H03F1/302

摘要： A transisterized circuit may be driven with a low voltage without saturation of a direct current operating voltage point. The transisterized circuit includes a first transisterized circuit formed by a cascade connection of a first differential transisterized circuit and a first emitter follower circuit, a second transisterized circuit formed by a cascade connection of a second emitter follower circuit and a second differential transistor circuit, and an inversion circuit connected between said first transisterized circuit and said second transistor circuit.

摘要翻译： 转移电路可以在没有直流工作电压点饱和的低电压下驱动。 转移电路包括由第一差分转移电路和第一射极跟随器电路的级联连接形成的第一转移电路，由第二发射极跟随器电路和第二差分晶体管电路的级联连接形成的第二转移电路，以及 连接在所述第一转移电路和所述第二晶体管电路之间的反相电路。

公开(公告)号：US20050249444A1

公开(公告)日：2005-11-10

申请号：US10628553

申请日：2003-07-29

申请人： Keisuke Imai ,  Toru Yamazaki ,  Kakuji Inoue ,  Setsuo Misaizu ,  Yasunori Nagakubo

发明人： Keisuke Imai ,  Toru Yamazaki ,  Kakuji Inoue ,  Setsuo Misaizu ,  Yasunori Nagakubo

IPC分类号： G02F1/03 ,  G02F1/01 ,  G02F1/035

CPC分类号： G02F1/0123 ,  H04B10/505 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/58

摘要： An optical transmitter comprises an amplitude modulation unit performing amplitude modulation of only a one-side amplitude of a main signal with a low-frequency signal having a predetermined frequency. An optical modulator receives an input signal generated after the one-side amplitude modulation, and modulates an incoming light in response to the received signal in accordance with a predetermined modulation-characteristic curve to output an optical output signal. An operating point control unit applies a predetermined bias voltage to the optical modulator to control a level of the input signal substantially applied to the modulation-characteristic curve so that the one-side amplitude of the main signal is applied to a minimum portion of the modulation-characteristic curve of the optical modulator.

摘要翻译： 光发射机包括幅度调制单元，其具有仅具有具有预定频率的低频信号的主信号的单侧振幅的幅度调制。 光调制器接收在单侧幅度调制之后产生的输入信号，并且根据预定的调制特性曲线响应于接收信号调制入射光以输出光输出信号。 操作点控制单元向光调制器施加预定的偏置电压以控制基本上施加到调制特性曲线的输入信号的电平，使得主信号的单侧振幅被施加到调制的最小部分 - 光学调制器的特征曲线。

公开(公告)号：US5636048A

公开(公告)日：1997-06-03

申请号：US406200

申请日：1995-03-16

申请人： Kazuhisa Kogure ,  Hirokazu Osada ,  Yasuhiro Tanaka ,  Hiroo Kitasagami ,  Makoto Miyoshi ,  Kakuji Inoue ,  Takayoshi Ikegami ,  Kenichi Kobayashi ,  Shinichiro Sano ,  Setsuo Misaizu ,  Masahiko Yamashita ,  Tatsuya Nishimura

发明人： Kazuhisa Kogure ,  Hirokazu Osada ,  Yasuhiro Tanaka ,  Hiroo Kitasagami ,  Makoto Miyoshi ,  Kakuji Inoue ,  Takayoshi Ikegami ,  Kenichi Kobayashi ,  Shinichiro Sano ,  Setsuo Misaizu ,  Masahiko Yamashita ,  Tatsuya Nishimura

IPC分类号： H03G3/20 ,  H03F3/08 ,  H03F3/34 ,  H03F3/45 ,  H03G3/30 ,  H04B3/04 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/293 ,  H04B10/294 ,  H04B10/299 ,  H04B10/564 ,  H04B10/572 ,  H04L25/03 ,  H04B10/06

CPC分类号： H04B10/6933 ,  H03F3/08 ,  H03G3/3084 ,  H04B10/6931 ,  H04L25/063

摘要： In an equalizing amplifier that equalizes an electric signal obtained from a light signal received via an optical transmission path, an AGC circuit generates first and second signals from the electric signal by referring to a threshold voltage. The first and second signals are complementary signals. An offset compensation circuit generates a first difference signal based on a difference between the first and second signals, compares the first difference signal with a first reference signal, and outputs, as the threshold voltage, a resultant error signal to the AGC circuit. The threshold voltage is varied so that it is located in the center of an amplitude of the electric signal whereby an offset of the AGC circuit can be compensated for.

摘要翻译： 在均衡放大器中，均衡从经由光传输路径接收的光信号获得的电信号，AGC电路通过参考阈值电压从电信号产生第一和第二信号。 第一和第二信号是互补信号。 偏移补偿电路基于第一和第二信号之间的差产生第一差分信号，将第一差分信号与第一参考信号进行比较，并将所得到的误差信号作为阈值电压输出到AGC电路。 阈值电压变化，使其位于电信号幅度的中心，从而可以补偿AGC电路的偏移。