公开(公告)号：US20050201443A1

公开(公告)日：2005-09-15

申请号：US11054554

申请日：2005-02-10

Applicant: Akihiko Hayashi ,  Kensuke Matsui ,  Hirokazu Osada

Inventor： Akihiko Hayashi ,  Kensuke Matsui ,  Hirokazu Osada

IPC: G02F1/035 ,  H01S3/00 ,  H04B10/50 ,  H04B10/564

CPC classification number: G02F1/0356 ,  H04B10/503 ,  H04B10/564

Abstract: A light source device has a CW light source for emitting first DC light, a level converter for converting optical electric power of the first DC light into second DC light and outputting the second DC light, and a mixer for mixing an optical main signal having a constant extinction ratio with the second DC light.

Abstract translation: 光源装置具有用于发射第一DC光的CW光源，用于将第一DC光的光功率转换为第二DC光并输出第二DC光的电平转换器，以及混合器，用于混合具有 恒定消光比与第二个直流光。

公开(公告)号：US07421211B2

公开(公告)日：2008-09-02

申请号：US11054554

申请日：2005-02-10

Applicant: Akihiko Hayashi ,  Kensuke Matsui ,  Hirokazu Osada

Inventor： Akihiko Hayashi ,  Kensuke Matsui ,  Hirokazu Osada

IPC: H04B10/02

CPC classification number: G02F1/0356 ,  H04B10/503 ,  H04B10/564

Abstract: A light source device has a continous wave (CW) light source for emitting first direct current (DC) light, a level converter for converting optical electric power of the first DC light into second DC light and outputting the second DC light, and a mixer for mixing an optical main signal having a constant extinction ratio with the second DC light.

Abstract translation: 光源装置具有用于发射第一直流（DC）光的连续波（CW）光源，用于将第一DC光的光功率转换为第二DC光并输出第二DC光的电平转换器，以及混频器 用于将具有恒定消光比的光学主信号与第二DC光混合。

公开(公告)号：US07389056B2

公开(公告)日：2008-06-17

申请号：US11043078

申请日：2005-01-27

Applicant: Masaki Kunii ,  Hirokazu Osada

Inventor： Masaki Kunii ,  Hirokazu Osada

IPC: H04B10/06 ,  H03F3/08 ,  H04L27/08

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G3/3036 ,  H04B10/66 ,  H04L27/368

Abstract: A preamplifier circuit, a clock switching circuit, and an optical receiver are provided that include a preamplifier that controls a bandwidth for conducting amplification on an input signal by varying a feedback resistance according to a control signal; a control signal generating part that determines the band of the output signal of the preamplifier to generate the control signal; and a correction signal generating part that generates a correction signal for correcting the control signal; wherein the correction signal corrects the control signal to adjust the feedback resistance. Accordingly, even when the number of rises and falls of an optical input signal in a given time period is less than a predetermined number range, the control signal may be properly generated to successfully conduct band control. Thus, an optical receiver that is not dedicated to a predetermined input signal pattern but is rather capable of automatically adjusting its bandwidth may be realized, and the cost of manufacturing the optical receiver structure may be reduced.

Abstract translation: 提供前置放大器电路，时钟切换电路和光接收器，其包括：前置放大器，其通过根据控制信号改变反馈电阻来控制用于对输入信号进行放大的带宽; 控制信号生成部，其决定前置放大器的输出信号的频带，生成控制信号; 以及校正信号生成部，其生成用于校正控制信号的校正信号; 其中所述校正信号校正所述控制信号以调整所述反馈电阻。 因此，即使在给定时间段内的光输入信号的上升和下降次数小于预定数量范围的情况下，也可以适当地产生控制信号以成功进行频带控制。 因此，可以实现不专用于预定输入信号模式但是能够自动调整其带宽的光接收机，并且可以降低制造光接收机结构的成本。

公开(公告)号：US20050128007A1

公开(公告)日：2005-06-16

申请号：US11043078

申请日：2005-01-27

Applicant: Masaki Kunii ,  Hirokazu Osada

Inventor： Masaki Kunii ,  Hirokazu Osada

IPC: H03F1/42 ,  H03F3/08 ,  H03G3/20 ,  H03G3/30 ,  H04L27/36

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G3/3036 ,  H04B10/66 ,  H04L27/368

Abstract: A preamplifier circuit, a clock switching circuit, and an optical receiver are provided that include a preamplifier that controls a bandwidth for conducting amplification on an input signal by varying a feedback resistance according to a control signal; a control signal generating part that determines the band of the output signal of the preamplifier to generate the control signal; and a correction signal generating part that generates a correction signal for correcting the control signal; wherein the correction signal corrects the control signal to adjust the feedback resistance. Accordingly, even when the number of rises and falls of an optical input signal in a given time period is less than a predetermined number range, the control signal may be properly generated to successfully conduct band control. Thus, an optical receiver that is not dedicated to a predetermined input signal pattern but is rather capable of automatically adjusting its bandwidth may be realized, and the cost of manufacturing the optical receiver structure may be reduced.

Abstract translation: 提供前置放大器电路，时钟切换电路和光接收器，其包括：前置放大器，其通过根据控制信号改变反馈电阻来控制用于对输入信号进行放大的带宽; 控制信号生成部，其决定前置放大器的输出信号的频带，生成控制信号; 以及校正信号生成部，其生成用于校正控制信号的校正信号; 其中所述校正信号校正所述控制信号以调整所述反馈电阻。 因此，即使在给定时间段内的光输入信号的上升和下降次数小于预定数量范围的情况下，也可以适当地产生控制信号以成功进行频带控制。 因此，可以实现不专用于预定输入信号模式但是能够自动调整其带宽的光接收机，并且可以降低制造光接收机结构的成本。

公开(公告)号：US5636048A

公开(公告)日：1997-06-03

申请号：US406200

申请日：1995-03-16

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

Inventor： 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: 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 classification number: H04B10/6933 ,  H03F3/08 ,  H03G3/3084 ,  H04B10/6931 ,  H04L25/063

Abstract: 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.

Abstract translation: 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。