Transimpedance (TIA) circuit usable for burst mode communications
    1.
    发明授权
    Transimpedance (TIA) circuit usable for burst mode communications 失效
    跨阻抗(TIA)电路可用于突发模式通信

    公开(公告)号:US07583904B2

    公开(公告)日:2009-09-01

    申请号:US11450396

    申请日:2006-06-12

    IPC分类号: H04B10/06

    CPC分类号: H04B10/693

    摘要: A transimpedance amplifier (TIA) circuit usable for burst mode communications is provided. The TIA circuit includes a TIA stage, a limiter-amplifier, and a DC restoration loop. The invention overcomes problems of the prior art relating to burst communications, such as a DC level in the output signal which can change from burst to burst and a duty-cycle distortion in large signals. This is achieved by using a DC restoration loop that ensures achieving zero DC potential within variable acquisition periods.

    摘要翻译: 提供了可用于突发模式通信的跨阻放大器(TIA)电路。 TIA电路包括TIA级,限幅放大器和DC恢复环路。 本发明克服了有关突发通信的现有技术的问题,例如可以从突发到突发的输出信号中的DC电平和大信号中的占空比失真。 这通过使用直流恢复环路来实现,该环路确保在可变采集周期内实现零直流电势。

    Circuit for detecting optical failures in a passive optical network
    2.
    发明授权
    Circuit for detecting optical failures in a passive optical network 有权
    用于检测无源光网络中的光学故障的电路

    公开(公告)号:US07646990B2

    公开(公告)日:2010-01-12

    申请号:US11514937

    申请日:2006-09-05

    IPC分类号: H04B10/04 H04J14/00

    摘要: A circuit for detecting optical failures in a passive optical network (PON) wherein digital burst data transmitted by an optical transmitter is monitored by a photodiode, includes a power determination unit coupled to the photodiode for providing measurements of an output optical power of a high logic level and a low logic level of the digital burst data during ON times of the optical transmitter and for providing a measurement of an output optical power during OFF times of the optical transmitter. A logic unit coupled to the power determination unit is responsive to the measurements for generating control and calibration signals. Such a circuit may be used for detecting rogue optical network unit (ONU) failure or eye safety hazards in a passive optical network (PON) wherein digital burst data transmitted by an optical transmitter is monitored by a photodiode.

    摘要翻译: 一种用于检测无源光网络(PON)中的光学故障的电路,其中由光发射机传输的数字突发数据由光电二极管监测,包括耦合到光电二极管的功率确定单元,用于提供高逻辑的输出光功率的测量 在光发射机的接通时间期间数字脉冲数据的电平和低逻辑电平,并且用于在光发射机的OFF时间期间提供输出光功率的测量。 耦合到功率确定单元的逻辑单元响应于用于产生控制和校准信号的测量。 这样的电路可以用于检测无源光网络(PON)中的流氓光网络单元(ONU)故障或眼睛安全隐患,其中由光发射机发送的数字突发数据由光电二极管监测。

    Burst mode clock and data recovery circuit and method
    3.
    发明申请
    Burst mode clock and data recovery circuit and method 失效
    突发模式时钟和数据恢复电路及方法

    公开(公告)号:US20080124092A1

    公开(公告)日:2008-05-29

    申请号:US11604748

    申请日:2006-11-28

    IPC分类号: H04L7/00 H04B10/00

    摘要: Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst data signal and a phase interpolator generates sampling clock signals using a reference clock and phase information. A phase estimation unit (PEU) determines a phase error in the over-sampled data streams; and a phase retrieval unit sets the phase interpolator with the respective phase information of the input burst data signal prior to reception of the input burst data signal.

    摘要翻译: 突发模式时钟和数据恢复(BCDR)电路和方法,能够快速地对无源光网络(PON)业务进行数据恢复。 从输入突发数据信号产生过采样数据流,相位内插器使用参考时钟和相位信息产生采样时钟信号。 相位估计单元(PEU)确定过采样数据流中的相位误差; 并且相位检索单元在接收输入的突发数据信号之前,将相位内插器与输入的脉冲串数据信号的各自的相位信息相对应。

    Transimpedance (TIA) circuit usable for burst mode communications
    4.
    发明申请
    Transimpedance (TIA) circuit usable for burst mode communications 失效
    跨阻抗(TIA)电路可用于突发模式通信

    公开(公告)号:US20070286611A1

    公开(公告)日:2007-12-13

    申请号:US11450396

    申请日:2006-06-12

    IPC分类号: H04B10/06

    CPC分类号: H04B10/693

    摘要: A transimpedance amplifier (TIA) circuit usable for burst mode communications is provided. The TIA circuit includes a TIA stage, a limiter-amplifier, and a DC restoration loop. The invention overcomes problems of the prior art relating to burst communications, such as a DC level in the output signal which can change from burst to burst and a duty-cycle distortion in large signals. This is achieved by using a DC restoration loop that ensures achieving zero DC potential within variable acquisition periods.

    摘要翻译: 提供了可用于突发模式通信的跨阻放大器(TIA)电路。 TIA电路包括TIA级,限幅放大器和DC恢复环路。 本发明克服了有关突发通信的现有技术的问题,例如可以从突发到突发的输出信号中的DC电平和大信号中的占空比失真。 这通过使用直流恢复环路来实现,该环路确保在可变采集周期内实现零直流电势。

    Method and apparatus for the electrical testing of printed circuit boards employing intermediate layer grounding
    5.
    发明授权
    Method and apparatus for the electrical testing of printed circuit boards employing intermediate layer grounding 失效
    采用中间层接地的印刷电路板的电气测试方法和装置

    公开(公告)号:US06630832B1

    公开(公告)日:2003-10-07

    申请号:US09719753

    申请日:2001-02-27

    IPC分类号: H01H3102

    摘要: This invention discloses an apparatus for electrical testing of an electrical circuit (12) having first and second side surfaces and including a plurality of conductors, the apparatus including at least one stimulation electrode (14, 16, 20) disposed adjacent at least one of the first and second side surfaces of the electrical circuit and being operative to apply thereto a stimulation electromagnetic field in a non-contact manner, at least one sensing electrode (25) disposed adjacent at least one of the first and second side surfaces of the electrical circuit and being operative to sense a resulting electromagnetic field produced by application of the stimulation electromagnetic field at various locations thereon in a non-contact manner wherein at least one of the at least one stimulation electrode and the at least one sensing electrode includes at least two electrodes at least one of which is disposed adjacent each of the first and second side surfaces of the electrical circuit. A method for electrical testing of an electrical circuit having first and second side surfaces and including a plurality of conductors is also disclosed.

    摘要翻译: 本发明公开了一种用于对具有第一和第二侧表面并包括多个导体的电路(12)进行电气测试的装置,该装置包括至少一个邻近于第一和第二侧面之一设置的刺激电极(14,16,20) 电路的第一和第二侧表面并且可操作以非接触方式向其施加刺激电磁场;至少一个感测电极(25)邻近电路的第一和第二侧表面中的至少一个设置 并且可操作地感测通过以非接触方式在其上的各个位置施加刺激电磁场而产生的所得电磁场,其中至少一个刺激电极和至少一个感测电极中的至少一个包括至少两个电极 其中至少一个被布置成与电路的第一和第二侧表面中的每一个相邻。 还公开了一种具有第一和第二侧表面并且包括多个导体的电路的电测试方法。

    Apparatus and method for measuring the quality of burst signals and performing optical line diagnostics
    6.
    发明授权
    Apparatus and method for measuring the quality of burst signals and performing optical line diagnostics 有权
    用于测量突发信号的质量并执行光学线路诊断的装置和方法

    公开(公告)号:US07925156B2

    公开(公告)日:2011-04-12

    申请号:US11961789

    申请日:2007-12-20

    IPC分类号: H04B10/00

    摘要: Apparatus and method to measure the quality of burst signals and to perform optical line diagnostics in and optical passive optical network (PON). Statistical information about phase noise (jitter), signal distortion, clock distortions, and any other effects present in burst signals is generated. The statistics are based on phase and bit-length distortions, direction and length of the effect as detected by a phase error detector integrated in a burst mode clock and data recovery (BCDR) circuit. The invention can be further adapted to perform optical line diagnostics to detect the root cause performance degradation and failures in the PON, thereby providing an optical layer supervision tool for monitoring the PON. The statistical information can be used to estimate the quality of service (QoS) per customer connected to the PON. In addition, the generated statistic information can be used to calibrate transmission parameters of optical network unit (ONU) transmitters.

    摘要翻译: 测量突发信号质量并在光无源光网络(PON)中进行光线诊断的装置和方法。 产生关于相位噪声(抖动),信号失真,时钟失真以及突发信号中存在的任何其他影响的统计信息。 统计数据是基于集成在突发模式时钟和数据恢复(BCDR)电路中的相位误差检测器检测到的效应的相位和位长度失真,方向和长度。 本发明可以进一步适用于执行光线路诊断,以检测PON的根本原因性能下降和故障,从而提供用于监视PON的光层监督工具。 统计信息可用于估计每个连接到PON的每个客户的服务质量(QoS)。 此外,生成的统计信息可用于校准光网络单元(ONU)发射机的传输参数。

    APPARATUS AND METHOD FOR MEASURING THE QUALITY OF BURST SIGNALS AND PERFORMING OPTICAL LINE DIAGNOSTICS
    7.
    发明申请
    APPARATUS AND METHOD FOR MEASURING THE QUALITY OF BURST SIGNALS AND PERFORMING OPTICAL LINE DIAGNOSTICS 有权
    测量BURST信号质量和执行光线诊断的装置和方法

    公开(公告)号:US20080193125A1

    公开(公告)日:2008-08-14

    申请号:US11961789

    申请日:2007-12-20

    IPC分类号: H04B10/08

    摘要: Apparatus and method to measure the quality of burst signals and to perform optical line diagnostics in and optical passive optical network (PON). Statistical information about phase noise (jitter), signal distortion, clock distortions, and any other effects present in burst signals is generated. The statistics are based oil phase and bit-length distortions, direction and length of the effect as detected by a phase error detector integrated in a burst mode clock and data recovery (BCDR) circuit. The invention can be further adapted to perform optical line diagnostics to detect the root cause performance degradation and failures in the PON, thereby providing an optical layer supervision tool for monitoring the PON. The statistical information can be used to estimate the quality of service (QoS) per customer connected to the PON. In addition, the generated statistic information can be used to calibrate transmission parameters of optical network unit (ONU) transmitters.

    摘要翻译: 测量突发信号质量并在光无源光网络(PON)中进行光线诊断的装置和方法。 产生关于相位噪声(抖动),信号失真,时钟失真以及突发信号中存在的任何其他影响的统计信息。 统计数据是基于油相和位长度失真,由集成在突发模式时钟和数据恢复(BCDR)电路中的相位误差检测器检测到的效应的方向和长度)。 本发明可以进一步适用于执行光线路诊断,以检测PON的根本原因性能下降和故障,从而提供用于监视PON的光层监督工具。 统计信息可用于估计每个连接到PON的每个客户的服务质量(QoS)。 此外,生成的统计信息可用于校准光网络单元(ONU)发射机的传输参数。

    Electrical testing of prited circuit boards employing a multiplicity of non-contact stimulator electrodes
    8.
    发明申请
    Electrical testing of prited circuit boards employing a multiplicity of non-contact stimulator electrodes 审中-公开
    采用多种非接触式刺激电极的电路板进行电气测试

    公开(公告)号:US20050248353A1

    公开(公告)日:2005-11-10

    申请号:US10660356

    申请日:2003-09-11

    摘要: Apparatus for the electrical testing of electrical circuits including at least one array of non-contact stimulator electrodes having a multiplicity of individually controlled stimulator electrodes arranged to be linearly disposed adjacent a first side of an electrical circuit to be tested; a signal generator coupled to the at least one array arranged to supply an electrical stimulation signal to each of the stimulator electrodes; and at least two non-contact sensor electrodes, each having dimensions sufficiently large to overlay part of a conductor on the electrical circuit to be tested.

    摘要翻译: 一种用于电气电气测试的装置,包括至少一组非接触式刺激器电极阵列,其具有多个独立控制的刺激电极,其布置成邻近被测电路的第一侧线性布置; 耦合到所述至少一个阵列的信号发生器,被布置成将电刺激信号提供给每个所述刺激器电极; 以及至少两个非接触传感器电极,每个非接触传感器电极的尺寸足够大以覆盖待测电路上的导体的一部分。

    Burst Mode Clock and Data Recovery Circuit and Method
    9.
    发明申请
    Burst Mode Clock and Data Recovery Circuit and Method 审中-公开
    突发模式时钟和数据恢复电路及方法

    公开(公告)号:US20120307949A1

    公开(公告)日:2012-12-06

    申请号:US13584163

    申请日:2012-08-13

    IPC分类号: H03D3/24

    摘要: Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst data signal and a phase interpolator generates sampling clock signals using a reference clock and phase information. A phase estimation unit (PEU) determines a phase error in the over-sampled data streams; and a phase retrieval unit sets the phase interpolator with the respective phase information of the input burst data signal prior to reception of the input burst data signal.

    摘要翻译: 突发模式时钟和数据恢复(BCDR)电路和方法,能够快速地对无源光网络(PON)业务进行数据恢复。 从输入突发数据信号产生过采样数据流,相位内插器使用参考时钟和相位信息产生采样时钟信号。 相位估计单元(PEU)确定过采样数据流中的相位误差; 并且相位检索单元在接收输入的突发数据信号之前,将相位内插器与输入的脉冲串数据信号的各自的相位信息相对应。

    Burst mode clock and data recovery circuit and method
    10.
    发明授权
    Burst mode clock and data recovery circuit and method 失效
    突发模式时钟和数据恢复电路及方法

    公开(公告)号:US08243869B2

    公开(公告)日:2012-08-14

    申请号:US11604748

    申请日:2006-11-28

    IPC分类号: H03D3/24

    摘要: Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst data signal and a phase interpolator generates sampling clock signals using a reference clock and phase information. A phase estimation unit (PEU) determines a phase error in the over-sampled data streams; and a phase retrieval unit sets the phase interpolator with the respective phase information of the input burst data signal prior to reception of the input burst data signal.

    摘要翻译: 突发模式时钟和数据恢复(BCDR)电路和方法,能够快速地对无源光网络(PON)业务进行数据恢复。 从输入突发数据信号产生过采样数据流,相位内插器使用参考时钟和相位信息产生采样时钟信号。 相位估计单元(PEU)确定过采样数据流中的相位误差; 并且相位检索单元在接收输入的突发数据信号之前,将相位内插器与输入的脉冲串数据信号的各自的相位信息相对应。