公开(公告)号：US08445832B2

公开(公告)日：2013-05-21

申请号：US13201212

申请日：2009-03-05

Applicant: Takashi Takemoto ,  Hiroki Yamashita ,  Tatsuya Saito

Inventor： Takashi Takemoto ,  Hiroki Yamashita ,  Tatsuya Saito

IPC: H03F3/08 ,  H01J43/00 ,  H01J40/14 ,  G01R19/00

CPC classification number: H03F3/087 ,  H03F1/223 ,  H03F1/34 ,  H03F3/082 ,  H03F3/3022 ,  H03F3/505 ,  H03F2200/453 ,  H04B10/6933

Abstract: An optical communication device which can be operated at high speed is provided. For example, the optical communication device includes: a pre-amplifier circuit PREAMP1 amplifying a current signal Iin from a photodiode PD, and converting an amplified signal into a voltage signal; and an operating-point controller circuit VTCTL1 controlling an operation of the PREAMP1. The PREAMP1 includes a negative feedback path formed by a feedback resistance Rf1, and includes: a level-shift circuit LS1 level-shifting in accordance with an operating-point control signal Vcon; and an amplifier circuit AMP1 connected to a subsequent stage of the LS1 and performing an amplifying operation with a high gain. The VTCTL1 includes a replica circuit configured by the same circuit and circuit parameter as those of the AMP1 and electrically connected between the input and the output, and generates the Vcon so that an output DC level of this replica circuit is matched with an input DC level of the AMP1.

Abstract translation: 提供可以高速运转的光通信装置。 例如，光通信装置包括：前置放大器电路PREAMP1，放大来自光电二极管PD的电流信号Iin，将放大后的信号变换为电压信号; 以及控制PREAMP1的操作的操作点控制器电路VTCTL1。 PREAMP1包括由反馈电阻Rf1形成的负反馈路径，并且包括：根据工作点控制信号Vcon的电平移位电路LS1电平移位; 以及连接到LS1的后级并且以高增益进行放大操作的放大器电路AMP1。 VTCTL1包括由与AMP1相同的电路和电路参数配置的电路复用电路，并且电连接在输入和输出端之间，并产生Vcon，使得该复制电路的输出直流电平与输入直流电平相匹配 的AMP1。

公开(公告)号：US08363683B2

公开(公告)日：2013-01-29

申请号：US12805712

申请日：2010-08-16

Applicant: Oscar Agazzi ,  Venugopal Gopinathan

Inventor： Oscar Agazzi ,  Venugopal Gopinathan

IPC: H04J3/06

CPC classification number: H04L25/03006 ,  H03M1/0604 ,  H03M1/0607 ,  H03M1/0609 ,  H03M1/0624 ,  H03M1/0836 ,  H03M1/1215 ,  H04B10/6933 ,  H04B10/697 ,  H04B10/6971 ,  H04L7/0054 ,  H04L7/0062 ,  H04L7/0337 ,  H04L25/03057 ,  H04L25/03133 ,  H04L25/03159 ,  H04L25/03203 ,  H04L2025/03445

Abstract: Digital signal processing based methods and systems for receiving data signals include parallel receivers, multi-channel receivers, timing recovery schemes, and, without limitation, equalization schemes. The present invention is implemented as a multi-path parallel receiver in which an analog-to-digital converter (“ADC”) and/or a digital signal processor (“DSP”) are implemented with parallel paths that operate at lower rates than the received data signal. In an embodiment, a parallel DSP-based receiver in accordance with the invention includes a separate timing recovery loop for each ADC path. In an embodiment, a parallel DSP-based receiver includes a separate automatic gain control (AGC) loop for each ADC path. In an embodiment, a parallel DSP-based receiver includes a separate offset compensation loop for each ADC path. In an embodiment, the present invention is implemented as a multi-channel receiver that receives a plurality of data signals.

Abstract translation: 用于接收数据信号的基于数字信号处理的方法和系统包括并行接收机，多信道接收机，定时恢复方案，并且不限于均衡方案。 本发明被实现为多路径并行接收机，其中使用以比接收的数据信号更低的速率工作的并行路径来实现模数转换器（ADC）和/或数字信号处理器（DSP）。 在一个实施例中，根据本发明的基于并行DSP的接收机包括用于每个ADC路径的单独的定时恢复环路。 在一个实施例中，并行基于DSP的接收机包括用于每个ADC路径的单独的自动增益控制（AGC）环路。 在一个实施例中，并行基于DSP的接收机包括用于每个ADC路径的单独的偏移补偿环路。 在一个实施例中，本发明被实现为接收多个数据信号的多信道接收机。

公开(公告)号：US20110222867A1

公开(公告)日：2011-09-15

申请号：US13040363

申请日：2011-03-04

Applicant: John Dietz ,  Michael Cahill

Inventor： John Dietz ,  Michael Cahill

IPC: H04B10/06

CPC classification number: H04B10/6933 ,  H03F3/087 ,  H04B10/6931

Abstract: An optical receiver includes an optical detector that generates a photocurrent at an output. A transimpedance amplifier generates an amplified voltage signal corresponding to the photocurrent generated by the optical detector. An offset voltage generator generates an offset voltage that biases the voltage signal generated by the transimpedance amplifier. A switch having a first input electrically connected to the output of the transimpedance amplifier and a second input electrically connected to the output of the offset voltage generator switches between the offset voltage and the voltage signal generated by the transimpedance amplifier.

Abstract translation: 光接收机包括在输出端产生光电流的光检测器。 跨阻放大器产生对应于由光检测器产生的光电流的放大电压信号。 偏移电压发生器产生偏置由跨阻抗放大器产生的电压信号的偏移电压。 具有电连接到跨阻抗放大器的输出的第一输入和电连接到偏移电压发生器的输出的第二输入的开关在偏移电压和由跨阻抗放大器产生的电压信号之间切换。

公开(公告)号：US07952427B2

公开(公告)日：2011-05-31

申请号：US11688724

申请日：2007-03-20

Applicant: Takeshi Nagahori

Inventor： Takeshi Nagahori

IPC: H03F3/68

CPC classification number: H04B10/6933

Abstract: A signal amplifier circuit includes peak value holding circuit 11 receiving positive-phase input signal, peak value holding circuit 12 receiving negative-phase input signal, adder 13 adding the positive-phase input signal and output signal of peak value holding circuit 12, adder 14 adding the negative-phase input signal and output signal of the peak value holding circuit 11, non-inverting amplifier 15 amplifying output signal of adder 13, non-inverting amplifier 16 amplifying output signal of adder 14, peak value holding circuit 21 receiving positive-phase output signal of non-inverting amplifier 15, peak value holding circuit 22 receiving negative-phase output signal of non-inverting amplifier 16, adder 23 adding the positive-phase output signal and output signal of peak value holding circuit 22, adder 24 adding the negative-phase output signal and output signal of peak value holding circuit 21, and differential amplifier 29 amplifying difference between output signals of adders 23 and 24. Error in discrimination for small-amplitude signal embedded in tail is reduced.

Abstract translation: 信号放大电路包括接收正相输入信号的峰值保持电路11，接收负相输入信号的峰值保持电路12，将正相输入信号和峰值保持电路12的输出信号相加的加法器13，加法器14 增加峰值保持电路11的负相输入信号和输出信号，放大加法器13的输出信号的非反相放大器15，放大加法器14的输出信号的非反相放大器16，接收正输出信号的峰值保持电路21， 非反相放大器15的相位输出信号，接收非反相放大器16的负相输出信号的峰值保持电路22，将正相输出信号和峰值保持电路22的输出信号相加的加法器23，加法器24相加 峰值保持电路21的负相输出信号和输出信号，放大加法器23a的输出信号之差 d 24.减少了嵌入尾部的小振幅信号的辨别误差。

公开(公告)号：US07421213B2

公开(公告)日：2008-09-02

申请号：US10817723

申请日：2004-04-02

Applicant: Torsten Harms ,  Stefan van Waasen

Inventor： Torsten Harms ,  Stefan van Waasen

IPC: H04B10/06 ,  H03G3/20 ,  G01J1/44 ,  H04L27/08

CPC classification number: H04B10/6933

Abstract: A control device with a switchable bandwidth including: an integrating element with a first capacitance, which is charged and discharged by at least one current; at least one second capacitance, which can be connected in parallel with the first capacitance via a first switch; and at least one voltage follower, via which the voltage present at the first capacitance can be fed to the second capacitance. In this case, the first switch is open if the voltage present at the first capacitance is fed to the second capacitance by means of the voltage follower. The first switch is closed if the second capacitance is connected in parallel with the first capacitance. The invention enables a further capacitance to be supplementarily connected without a disturbance signal arising.

Abstract translation: 一种具有可切换带宽的控制装置，包括：具有第一电容的积分元件，其由至少一个电流充电和放电; 至少一个第二电容，其可以经由第一开关与所述第一电容并联连接; 以及至少一个电压跟随器，通过该电压跟随器，存在于第一电容处的电压可以被馈送到第二电容。 在这种情况下，如果通过电压跟随器将存在于第一电容的电压馈送到第二电容，则第一开关是断开的。 如果第二电容与第一电容并联连接，则第一开关闭合。 本发明使得可以补充地连接另外的电容，而不产生干扰信号。

公开(公告)号：US20070263673A1

公开(公告)日：2007-11-15

申请号：US11826414

申请日：2007-07-16

Applicant: Oscar Agazzi ,  Venugopal Gopinathan

Inventor： Oscar Agazzi ,  Venugopal Gopinathan

IPC: H04J3/06

CPC classification number: H04L25/03006 ,  H03M1/0604 ,  H03M1/0607 ,  H03M1/0609 ,  H03M1/0624 ,  H03M1/0836 ,  H03M1/1215 ,  H04B10/6933 ,  H04B10/697 ,  H04B10/6971 ,  H04L7/0054 ,  H04L7/0062 ,  H04L7/0337 ,  H04L25/03057 ,  H04L25/03133 ,  H04L25/03159 ,  H04L25/03203 ,  H04L2025/03445

Abstract: Digital signal processing based methods and systems for receiving data signals include parallel receivers, multi-channel receivers, timing recovery schemes, and, without limitation, equalization schemes. The present invention is implemented as a multi-path parallel receiver in which an analog-to-digital converter (“ADC”) and/or a digital signal processor (“DSP”) are implemented with parallel paths that operate at lower rates than the received data signal. In an embodiment, a parallel DSP-based receiver in accordance with the invention includes a separate timing recovery loop for each ADC path. In an embodiment, a parallel DSP-based receiver includes a separate automatic gain control (AGC) loop for each ADC path. In an embodiment, a parallel DSP-based receiver includes a separate offset compensation loop for each ADC path. In an embodiment, the present invention is implemented as a multi-channel receiver that receives a plurality of data signals.

Abstract translation: 用于接收数据信号的基于数字信号处理的方法和系统包括并行接收机，多信道接收机，定时恢复方案，并且不限于均衡方案。 本发明被实现为多路径并行接收机，其中使用平行路径来实现模数转换器（“ADC”）和/或数字信号处理器（“DSP”），该路径以比 接收数据信号。 在一个实施例中，根据本发明的基于并行DSP的接收机包括用于每个ADC路径的单独的定时恢复环路。 在一个实施例中，并行基于DSP的接收机包括用于每个ADC路径的单独的自动增益控制（AGC）环路。 在一个实施例中，并行基于DSP的接收机包括用于每个ADC路径的单独的偏移补偿环路。 在一个实施例中，本发明被实现为接收多个数据信号的多信道接收机。

公开(公告)号：US07092644B2

公开(公告)日：2006-08-15

申请号：US09967415

申请日：2001-09-28

Applicant: Andrew Davidson

Inventor： Andrew Davidson

IPC: H04B10/06

CPC classification number: G01M11/33 ,  H04B10/6933

Abstract: An optical receiver may include a photodetector that is configured to generate an electrical signal in response to detecting an optical signal, a first gain path coupled to receive and amplify the electrical signal generated by the photodetector, and a second gain path coupled to receive and amplify the electrical signal generated by the photodetector. The second gain path may have a higher gain than the first gain path. The two gain paths may be configured to amplify the electrical signal independently of each other. The optical receiver may also include a switch that selectably outputs an amplified electrical signal from one of the gain paths based on a magnitude of a signal corresponding to the optical signal.

公开(公告)号：US06928249B2

公开(公告)日：2005-08-09

申请号：US09785051

申请日：2001-02-15

Applicant: Michael A. Robinson

Inventor： Michael A. Robinson

IPC: H04B10/158 ,  H03F3/08

CPC classification number: H04B10/6933 ,  H04B10/6932

Abstract: A fiber optic receiver that includes an opto-electronic transducer, an adjustable response preamplifier circuit, and a post-amplifier circuit is described. The opto-electronic transducer is configured to generate an electrical data signal in response to a received optical data signal. The adjustable response preamplifier circuit is coupled to the opto-electronic transducer and is operable to amplify an electrical data signal generated by the opto-electronic transducer. The post-amplifier circuit is coupled to an output of the preamplifier circuit and is configured to transmit a mode control signal to the preamplifier circuit in response to a received control signal. By transmitting the mode control signal from the post-amplifier to the preamplifier, the adjustable response amplifier may be placed in the preamplifier stage within a receiver optical sub-assembly (ROSA). As a result, the fiber optic receiver may accommodate multiple operating modes (e.g., multiple bandwidth and power operating modes) while conforming to existing receiver optical sub-assembly (ROSA) size and pin count constraints.

Abstract translation: 描述了包括光电换能器，可调节响应前置放大器电路和后置放大器电路的光纤接收器。 光电换能器被配置为响应于所接收的光数据信号产生电数据信号。 可调节响应前置放大器电路耦合到光电换能器并且可操作以放大由光电换能器产生的电数据信号。 后置放大器电路耦合到前置放大器电路的输出，并且被配置为响应于接收的控制信号将模式控制信号发送到前置放大器电路。 通过将来自后置放大器的模式控制信号发送到前置放大器，可调节响应放大器可以放置在接收机光学子组件（ROSA）内的前置放大器级中。 结果，光纤接收器可以适应多种操作模式（例如，多个带宽和功率操作模式），同时符合现有的接收机光学子组件（ROSA）尺寸和引脚数限制。

公开(公告)号：US20050135817A1

公开(公告)日：2005-06-23

申请号：US10817723

申请日：2004-04-02

Applicant: Torsten Harms ,  Stefan van Waasen

Inventor： Torsten Harms ,  Stefan van Waasen

IPC: H03L7/00 ,  H04B10/158 ,  H04B10/06

CPC classification number: H04B10/6933

Abstract: A control device with a switchable bandwidth including: an integrating element with a first capacitance, which is charged and discharged by at least one current; at least one second capacitance, which can be connected in parallel with the first capacitance via a first switch; and at least one voltage follower, via which the voltage present at the first capacitance can be fed to the second capacitance. In this case, the first switch is open if the voltage present at the first capacitance is fed to the second capacitance by means of the voltage follower. The first switch is closed if the second capacitance is connected in parallel with the first capacitance. The invention enables a further capacitance to be supplementarily connected without a disturbance signal arising.

Abstract translation: 一种具有可切换带宽的控制装置，包括：具有第一电容的积分元件，其由至少一个电流充电和放电; 至少一个第二电容，其可以经由第一开关与所述第一电容并联连接; 以及至少一个电压跟随器，通过该电压跟随器，存在于第一电容处的电压可以被馈送到第二电容。 在这种情况下，如果通过电压跟随器将存在于第一电容的电压馈送到第二电容，则第一开关是断开的。 如果第二电容与第一电容并联连接，则第一开关闭合。 本发明使得可以补充地连接另外的电容，而不产生干扰信号。

公开(公告)号：US06907202B1

公开(公告)日：2005-06-14

申请号：US09478604

申请日：2000-01-06

Applicant: Satoshi Ide ,  Shinichi Sakuramoto

Inventor： Satoshi Ide ,  Shinichi Sakuramoto

IPC: H04B10/40 ,  H03G3/30 ,  H03K5/08 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/50 ,  H04B10/60 ,  H04L25/03 ,  H04L25/06 ,  H04B10/00

CPC classification number: H04B10/695 ,  H03G3/3084 ,  H03K5/082 ,  H04B10/6933

Abstract: A burst signal detection circuit for detecting the arrival of a burst-like signal, which can accurately detect the burst signal against the DC level variations even in the case where the arriving burst signal is a weak signal, is disclosed. A DC variation removing circuit detects the bottom level of an input signal and removes the DC level variation of the input signal based on the bottom level. An amplitude identifying circuit detects the presence or absence of a burst signal based on the output signal of the DC variation removing circuit. The amplitude identifying circuit includes an amplitude detection circuit for detecting the maximum amplitude of the output signal of the DC variation removing circuit, a threshold level control circuit for controlling the threshold level and a comparator for comparing the output level of the amplitude detection circuit with the threshold level and outputting a detection signal indicating the presence or absence of a burst signal.

Abstract translation: 公开了一种突发信号检测电路，用于检测突发状信号的到达，即使在到达的突发信号是弱信号的情况下也可以针对DC电平变化来精确地检测突发信号。 DC变化消除电路检测输入信号的底部电平，并且基于底部电平去除输入信号的DC电平变化。 振幅识别电路根据直流变化消除电路的输出信号来检测是否存在突发信号。 幅度识别电路包括用于检测DC变化消除电路的输出信号的最大幅度的振幅检测电路，用于控制阈值电平的阈值电平控制电路和用于将振幅检测电路的输出电平与 并输出指示是否存在突发信号的检测信号。