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    Recovery of client clock without jitter
    3.
    发明授权
    Recovery of client clock without jitter 有权
    恢复客户端时钟无抖动

    公开(公告)号：US07873133B2

    公开(公告)日：2011-01-18

    申请号：US11426481

    申请日：2006-06-26

    申请人： Scott A. Young ,  Ting-Kuang Chiang

    发明人： Scott A. Young ,  Ting-Kuang Chiang

    IPC分类号： H03D3/24

    CPC分类号： H03L7/081 ,  H03L7/185 ,  H03L2207/12 ,  H04J3/076

    摘要： The present invention provides a system, apparatus and method for recovering a client signal clock. The present invention is able to more effectively remove jitter within a clock signal by providing a phase shifting element in the feedback of a PLL system to compensate for sudden changes in an input reference clock. The PLL system provides flexible clock recovery so that it can accommodate various payload types because it extracts a client clock signal independent of a corresponding justification count number.

    摘要翻译： 本发明提供一种用于恢复客户端信号时钟的系统，装置和方法。 通过在PLL系统的反馈中提供相移元件来补偿输入参考时钟的突然变化，本发明能够更有效地消除时钟信号内的抖动。 PLL系统提供灵活的时钟恢复，使得它可以适应各种有效载荷类型，因为它提取独立于对应对齐计数的客户端时钟信号。

    HIGH-CAPACITY SWITCH
    5.
    发明申请
    HIGH-CAPACITY SWITCH 有权
    高容量开关

    公开(公告)号：US20100254705A1

    公开(公告)日：2010-10-07

    申请号：US12418283

    申请日：2009-04-03

    申请人： Drew D. Perkins ,  Ting-Kuang Chiang ,  Curtis Villamizar

    发明人： Drew D. Perkins ,  Ting-Kuang Chiang ,  Curtis Villamizar

    IPC分类号： H04J14/02

    CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0212 ,  H04J14/0221 ,  H04Q2011/0013 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0032

    摘要： Consistent with the present disclosure, an optical switch is provided that switches multiple wavelength division multiplexed (WDM) optical signals. Each of the WDM signals includes optical signals having the same wavelengths. The WDM signals are supplied to optical splitters, which supply power split portions of the WDM signals to corresponding optical gates. Groups of the optical gates are associated with a corresponding switching block, which may include a cyclical arrayed waveguide grating (AWG), and the optical gates within each group are controlled so that one gate passes a received WDM signal portion while the remaining optical gates in the group are in a blocking configuration. As a result, the WDM portion received by the non-blocking gate is demultiplexed in the switching block and each of the wavelength components that constitute the selected WDM portion are supplied to corresponding outputs within the switching block. In a later time interval, a different optical gate may be rendered non-blocking so that a different WDM signal portion, supplied from a different optical splitter and carrying different information over the same wavelengths, may be input to the switching block. Thus, by controlling the optical gates, different WDM signal portions may be switched to, and thus demultiplexed by, a particular switching block. In addition, portions of the same WDM signal may be selectively supplied to different AWGs by appropriately control of the optical gates.

    摘要翻译： 根据本公开，提供了一种切换多个波分复用（WDM）光信号的光开关。 每个WDM信号包括具有相同波长的光信号。 WDM信号被提供给光分路器，其将WDM信号的功率分割部分提供给相应的光栅。 光栅的组与相应的切换块相关联，其可以包括周期性阵列波导光栅（AWG），并且控制每个组内的光栅，使得一个栅极通过接收的WDM信号部分，而其余的光栅在 该组处于阻塞配置。 结果，由非阻塞栅极接收的WDM部分在切换块中解复用，并且构成所选WDM部分的每个波长分量被提供给切换块内的相应输出。 在稍后的时间间隔中，不同的光栅可以被渲染为非阻塞，使得可以将不同的光分路器提供的不同的WDM信号部分在相同的波长上传送不同的信息，可以被输入到切换块。 因此，通过控制光栅，可以将不同的WDM信号部分切换到特定切换块并由其解复用。 此外，通过适当地控制光栅，可以将相同WDM信号的部分选择性地提供给不同的AWG。

    Optical transmission network with asynchronous mapping and demapping and digital wrapper frame for the same
    6.
    发明授权
    Optical transmission network with asynchronous mapping and demapping and digital wrapper frame for the same 有权

    公开(公告)号：US07769051B2

    公开(公告)日：2010-08-03

    申请号：US11876714

    申请日：2007-10-22

    申请人： Drew D. Perkins ,  Ting-Kuang Chiang ,  Edward E. Sprague ,  Daniel P. Murphy

    发明人： Drew D. Perkins ,  Ting-Kuang Chiang ,  Edward E. Sprague ,  Daniel P. Murphy

    IPC分类号： H04J1/00

    CPC分类号： H04L1/0057 ,  H04J3/0691 ,  H04J3/07 ,  H04J3/1611 ,  H04J3/1652 ,  H04J2203/0085

    摘要： An optical transmission network is inherently asynchronous due to the utilization of a variable overhead ratio (V-OHR). The network architecture makes extensive use of OEO regeneration, i.e., deals with any electronic reconditioning to correct for transmission impairments, such as, for example, FEC encoding, decoding and re-encoding, signal reshaping, retiming as well as signal regeneration. The optical transmission network includes a plesiochronous clocking system with intermediate nodes designed to operate asynchronously with a single local frequency clock without complicated network synchronization schemes employing high cost clocking devices such as phase locked loop (PLL) control with crystal oscillators and other expensive system components. The asynchronous network operation provides for asynchronous remapping or remapping of any client signal utilizing any type of transmission protocol where the line side rate or frequency is always the same frequency for the payload signal and the local frequency at an intermediate node is set to a local reference clock in accordance with the payload type and its overhead ratio, i.e., the overhead ratio is varied to meet the desired difference between the line rate or frequency and the desired client signal payload rate or frequency for the particular client signal payload type.

    Transmission line with low dispersive properties and its application in equalization
    9.
    发明授权
    Transmission line with low dispersive properties and its application in equalization 有权
    传输线具有低色散特性及其在均衡中的应用

    公开(公告)号：US07446622B2

    公开(公告)日：2008-11-04

    申请号：US10927565

    申请日：2004-08-26

    申请人： Ting-Kuang Chiang

    发明人： Ting-Kuang Chiang

    IPC分类号： H04B3/04

    CPC分类号： H01P3/085 ,  H01P3/081 ,  H04B3/04

    摘要： A transmission line is provided with added shunt resistance, RSH, distributed along the length of the micro transmission line permitting the extension of constant characteristic impedance to the transmission line to lower signal frequencies. The loss in gain to the signal propagating the transmission line due to the added resistance can be compensated for by amplification provided at the output of the transmission line or at output taps provided along the length of the transmission line such as in cases where the line is utilized as a circuit delay line. An exemplified application disclosed is an analog delay line formed as a metal microstrip in an IC chip circuit provided, for example, in a feed forward equalizer (FFE).

    摘要翻译： 传输线具有附加的分流电阻R SUB，沿着微传输线的长度分布，允许将恒定特性阻抗扩展到传输线以降低信号频率。 可以通过在传输线的输出处提供的放大或沿着传输线的长度提供的输出抽头来补偿由于增加的电阻而使传输线传播的信号的增益损失，例如在线路为 用作电路延迟线。 所公开的示例性应用是在例如前馈均衡器（FFE）中提供的IC芯片电路中形成为金属微带的模拟延迟线。