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    • 9. 发明授权
    • Transmitters and receivers using a jitter-attenuated clock derived from a gapped clock reference
    • 使用抖动衰减时钟的发射器和接收器,该时钟源从有间隙时钟参考
    • US08855258B1
    • 2014-10-07
    • US13250794
    • 2011-09-30
    • Viet DoSimon Pang
    • Viet DoSimon Pang
    • H04L7/00
    • H04L7/033H04J3/076
    • A system and method are provided for resynchronizing a transmission signal using a jitter-attenuated clock derived from an asynchronous gapped clock. A first-in first-out (FIFO) memory accepts an asynchronous gapped clock derived from a first clock having a first frequency. The gapped clock has an average second frequency less than the first frequency. The input serial stream of data is loaded at a rate responsive to the gapped clock. A dynamic numerator (DN) and dynamic denominator (DD) are iteratively calculated for the gapped clock, averaged, and an averaged numerator (A and an averaged denominator (AD) are generated. The first frequency is multiplied by the ratio of AN/AD to create a jitter-attenuated second clock having the second frequency. The FIFO memory accepts the jitter-attenuated second clock and supplies data from memory at the second frequency. A framer accepts the data from the FIFO memory and the jitter-attenuated second clock.
    • 提供了一种系统和方法,用于使用从异步间隔时钟导出的抖动衰减时钟重新同步传输信号。 先进先出(FIFO)存储器接收从具有第一频率的第一时钟导出的异步间隔时钟。 间隔时钟的平均第二频率小于第一频率。 数据的输入串行流以响应于有间隙的时钟的速率加载。 对于有间隙的时钟进行迭代计算动态分子(DN)和动态分母(DD),得到平均分子(A和平均分母(AD)),第一个频率乘以AN / AD 创建具有第二频率的抖动衰减的第二时钟,FIFO存储器接受抖动衰减的第二时钟并以第二频率从存储器提供数据,成帧器接收来自FIFO存储器的数据和抖动衰减的第二时钟。