公开(公告)号：US08294501B1

公开(公告)日：2012-10-23

申请号：US13035331

申请日：2011-02-25

申请人： Christopher Thomas ,  Yanggao Qiu ,  Junling Zang ,  Wei Fu

发明人： Christopher Thomas ,  Yanggao Qiu ,  Junling Zang ,  Wei Fu

IPC分类号： H03H11/16

CPC分类号： H03L7/081 ,  H03L7/099 ,  H03L7/197

摘要： Systems and methods are disclosed for improving the accuracy of phase spacing of multiphase clocks. In one example, method includes receiving a reference clock having a first frequency and sampling the reference clock with a plurality of multiphase clocks having a second frequency to generate a plurality of samples. The second frequency is a non-integer multiple of the first frequency. The method also includes detecting transitions of the reference clock occurring between the samples generated from a plurality of pairs of the multiphase clocks and counting the transitions to generate a transition count for each pair of the multiphase clocks. The method also includes summing a set of the transition counts to generate a measured phase for a first multiphase clock, calculating a reference phase for the first multiphase clock, and generating a phase skew value for the first multiphase clock based on the measured phase and the reference phase.

摘要翻译： 公开了用于提高多相时钟相位精度的系统和方法。 在一个示例中，方法包括接收具有第一频率的参考时钟并且用具有第二频率的多个多相时钟采样参考时钟以产生多个采样。 第二频率是第一频率的非整数倍。 该方法还包括检测在从多对多相时钟产生的样本之间发生的参考时钟的转变，并对转换进行计数，以产生每对多相时钟的转换计数。 该方法还包括对一组转换计数求和以产生第一多相时钟的测量相位，计算第一多相时钟的参考相位，以及基于测量相位和第一多相时钟产生第一多相时钟的相位偏移值 参考阶段。