公开(公告)号：US20230163740A1

公开(公告)日：2023-05-25

申请号：US17531811

申请日：2021-11-22

Applicant: Faraday Technology Corp.

Inventor： PRATEEK KUMAR GOYAL ,  RAGHU NANDAN CHEPURI ,  VINOD KUMAR JAIN

IPC: H03G3/30 ,  H04B10/69 ,  H03F3/45 ,  H03M1/12

CPC classification number: H03G3/3084 ,  H03F3/45 ,  H03M1/12 ,  H04B10/6933 ,  H03F2200/375 ,  H03F2203/45212

Abstract: A method for removing offset in a receiver of an integrated circuit (IC) includes: determining digital codes of differential input voltages of an amplifier in a first receiving lane of the receiver; comparing the digital codes to a digital code corresponding to an optimum common mode voltage (VCM) of the receiver; according to the comparison, determining a bias code for adjusting both the differential input voltages to match the optimum VCM; and inputting the bias code to a bias circuit of the receiver. The first receiving lane of the receiver includes a plurality of amplifiers. The method steps are repeated for each amplifier of the plurality of amplifiers, and then repeated for all receiving lanes of the IC.

公开(公告)号：US10014956B2

公开(公告)日：2018-07-03

申请号：US15365992

申请日：2016-12-01

Applicant: Oclaro Japan, Inc.

Inventor： Riu Hirai

IPC: H04B10/25 ,  H04B10/69

CPC classification number: H04B10/6933 ,  H04B10/2504 ,  H04B10/2513 ,  H04B10/6931 ,  H04B10/695 ,  H04B10/697

Abstract: Provided is an optical receiver module which includes a conversion unit which converts an input optical signal to an electrical signal, an amplification unit which amplifies the electrical signal and outputs an amplified signal, a reception unit which directly or indirectly receives the amplified signal, and an offsetting unit which offsets the electrical signal such that a difference between a center of an intensity width of the electrical signal and a center of an intensity range of a signal capable of being received by the reception unit becomes small.

公开(公告)号：US20170338894A1

公开(公告)日：2017-11-23

申请号：US15601639

申请日：2017-05-22

Applicant: Finisar Corporation

Inventor： Sorin Petre Voinigescu ,  Konstantinos Vasilakopoulos

IPC: H04B10/69 ,  H03F3/45

CPC classification number: H04B10/6933 ,  G11C27/026 ,  H03F3/45085 ,  H03F3/45278 ,  H03F3/45291 ,  H03F2203/45144 ,  H03F2203/45396 ,  H03F2203/45722 ,  H04B10/69

Abstract: An embodiment includes a track and hold amplifier device. A device may include an emitter follower transistor coupled to each of an input and an output. The device may also include a charging node coupled between the output and a voltage supply, wherein the charging node is also coupled to the input via the emitter follower transistor. Further, the device may include a cascode switch coupled to each of the input and the output. The cascode switch may be configured to cause the emitter follower transistor to operate in a conductive state and charge the charging node during a track mode. The cascode switch may also be configured to cause the emitter follower transistor to operate in a non-conductive state to isolate the charging node from the input during a hold mode. The cascode switch may include a MOS-HBT transistor combination operating in class AB mode.

公开(公告)号：US20150372648A1

公开(公告)日：2015-12-24

申请号：US14747465

申请日：2015-06-23

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshiyuki Sugimoto

IPC: H03F1/02 ,  H03F3/45 ,  H03F3/68 ,  H04B10/079

CPC classification number: H04B10/0797 ,  H03F1/083 ,  H03F3/08 ,  H03F3/45475 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2200/462 ,  H03F2203/45288 ,  H04B10/272 ,  H04B10/6933

Abstract: A TIA comprises a TIA core that converts a current signal to a voltage signal, a single-to-differential converter that generates a differential voltage signal from the voltage signal, a feedback circuit that generates a control signal from the differential voltage signal, a bypass circuit that generates the current signal by subtracting the bypass current from the input current so that an average value of the current signal is maintained at a predetermined value, and a monitor circuit that generates a monitor current proportional to the bypass current from the control signal

Abstract translation: TIA包括将电流信号转换为电压信号的TIA核心，从电压信号产生差分电压信号的单差分转换器，从差分电压信号产生控制信号的反馈电路，旁路 电路，通过从输入电流中减去旁路电流来产生电流信号，使得电流信号的平均值保持在预定值;以及监视电路，其从控制信号产生与旁路电流成正比的监视电流

公开(公告)号：US20110318015A1

公开(公告)日：2011-12-29

申请号：US13166580

申请日：2011-06-22

Applicant: Yoshiyuki SUGIMOTO

Inventor： Yoshiyuki SUGIMOTO

IPC: H04B10/06

CPC classification number: H04B10/616 ,  H04B10/6933

Abstract: An amplifier for an optical receiver is disclosed. The amplifier includes a common base buffer, a differential amplifier, and some buffer amplifiers, where circuit block from the common base buffer to the buffer amplifiers have the differential arrangement and are connected in series in this order. The amplifier further includes an offset compensator that receives the outputs of the buffer amplifier put in the rear end of the amplifier and outputs control signals, which are complementary to each other and filtered by a low-pass-filter, to the base of the transistors in the common base buffer to compensate the offset appeared in the output of the buffer amplifier.

Abstract translation: 公开了一种用于光接收器的放大器。 该放大器包括一个公共基极缓冲器，一个差分放大器和一些缓冲放大器，其中从公共基极缓冲器到缓冲放大器的电路块具有差分布置并按此顺序串联连接。 放大器还包括偏移补偿器，其接收放在放大器的后端的缓冲放大器的输出，并输出彼此互补并被低通滤波器滤波的控制信号到晶体管的基极 在公共基本缓冲器中补偿偏移出现在缓冲放大器的输出端。

公开(公告)号：US20110316632A1

公开(公告)日：2011-12-29

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: H03F3/16 ,  H03F1/22 ,  H03G3/20

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：US07835387B2

公开(公告)日：2010-11-16

申请号：US12496211

申请日：2009-07-01

Applicant: Oscar Agazzi ,  Venugopal Gopinathan

Inventor： Oscar Agazzi ,  Venugopal Gopinathan

IPC: H04L12/66

CPC classification number: H04B10/6971 ,  H03M1/0604 ,  H03M1/0607 ,  H03M1/0624 ,  H03M1/0836 ,  H03M1/1215 ,  H04B10/6933 ,  H04B10/697 ,  H04L7/0062 ,  H04L25/03057 ,  H04L25/03159 ,  H04L2025/03445

Abstract: Digital signal processing based methods and systems for receiving electrical and/or optical data signals include electrical receivers, optical receivers, parallel receivers, multi-channel receivers, timing recovery schemes, and, without limitation, equalization schemes. The present invention is implemented as a single path receiver. Alternatively, 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.

Abstract translation: 用于接收电和/或光数据信号的基于数字信号处理的方法和系统包括电接收机，光接收机，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。 本发明被实现为单路径接收机。 或者，本发明被实现为多路径并行接收机，其中使用以较低速率操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”） 比接收的数据信号。

公开(公告)号：US07536114B2

公开(公告)日：2009-05-19

申请号：US11405023

申请日：2006-04-14

Applicant: Michael Gieseler ,  Manfred Sorst

Inventor： Michael Gieseler ,  Manfred Sorst

IPC: H04B10/06 ,  H04B1/10 ,  H04L27/08 ,  H03K17/78

CPC classification number: H04B10/6933 ,  H03F3/45085 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2203/45512 ,  H03F2203/45524 ,  H03F2203/45526 ,  H03F2203/45702 ,  H03G1/007 ,  H03G3/3084 ,  H03K5/082 ,  H03K5/1534 ,  H03K5/2445 ,  H03K5/2481

Abstract: The aim of the invention, which concerns a method and a system for converting an optical received pulse train into an electrical output pulse train, is to create a method and an associated circuit arrangement for converting an optical received pulse train into an electrical output pulse train whereby achieving an improvement in transmission quality and a reduction in latency time. According to the invention, the aim, with regard to the method, is achieved by virtue of the fact that: the current pulse train is converted in a controlled manner into a first voltage pulse train; the first voltage pulse train is converted into a second voltage pulse train by controllably limiting its amplitude; according to the amplitude of the second voltage pulse train, a third voltage pulse train, which is free from a static offset of the second voltage pulse train, is generated so that it is lower than a first amplitude quantity, and the third voltage pulse train, which is free from a dynamic offset, is generated so that it is greater than a second amplitude quantity that is greater than the first amplitude quantity; in the event of a packet pause, the amplitude of the third voltage pulse train is set to zero, and; the output pulse train is generated from the third voltage pulse train.

Abstract translation: 涉及将光接收脉冲串转换为电输出脉冲串的方法和系统的本发明的目的是创建一种方法和相关联的电路装置，用于将光接收脉冲串转换成电输出脉冲串 从而实现传输质量的改善和延迟时间的减少。 根据本发明，关于该方法的目的是通过以下事实实现的：将当前脉冲串以受控的方式转换成第一电压脉冲串; 通过可控地限制其幅度将第一电压脉冲串转换成第二电压脉冲串; 根据第二电压脉冲串的振幅，产生没有第二电压脉冲串的静态偏移的第三电压脉冲串，使其低于第一振幅，第三电压脉冲串 产生没有动态偏移的信号，使得其大于大于第一幅度量的第二幅度量; 在数据包暂停的情况下，将第三电压脉冲串的振幅设定为零， 从第三电压脉冲串产生输出脉冲串。

公开(公告)号：US20080278228A1

公开(公告)日：2008-11-13

申请号：US12180595

申请日：2008-07-28

Applicant: Torsten Harms ,  Stefan van Waasen

Inventor： Torsten Harms ,  Stefan van Waasen

IPC: H03B1/04

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：US07406268B2

公开(公告)日：2008-07-29

申请号：US10649602

申请日：2003-08-27

Applicant: Karl Schrödinger

Inventor： Karl Schrödinger

IPC: H04B10/06

CPC classification number: H04B10/6933

Abstract: An optical receiver circuit is constructed to be immune to interference from external interference signals. The optical receiver circuit includes a differential amplifier having an optical reception device connected to one input of the differential amplifier. The optical receiver circuit also includes an electrical element for simulating the electrical behavior of the reception device in the illumination-free state. The electrical element is connected to the other input of the differential amplifier.

Abstract translation: 光接收器电路被构造为免受来自外部干扰信号的干扰。 光接收器电路包括具有连接到差分放大器的一个输入的光接收装置的差分放大器。 光接收器电路还包括用于在无照射状态下模拟接收装置的电气行为的电气元件。 电气元件连接到差分放大器的另一个输入端。