估算高稳时钟抖动的幂率积分下限的研究  

Research on the Lower Limits of Power-Law-Integral for Estimating Jitter of the High-Stability Clocks

作　　者：曹鹏[1] 王明飞[1] 费元春[2] 

机构地区：[1]北京印刷学院信息与机电学院,北京102600 [2]北京理工大学信息与电子学院,北京100081

出　　处：《电子学报》2010年第12期2846-2849,共4页Acta Electronica Sinica

基　　金：北京市自然科学基金重点项目(No.KZ201010015013);北京市学术创新团队项目(No.06020109002);北京市人才强教项目(No.06170107018)

摘　　要：幂律积分法是估算亚皮秒级时钟信号抖动所采用的一种常用方法.该方法的换算结果与积分区间有关,尤其与积分下限有关.通过对幂律积分法将相位噪声转换为抖动的关系式介绍,推导了幂律积分下限与采样时钟的频率、被采样模拟信号的最高频率及A/D变换的有效位之间的关系,给出了估算幂律积分下限的算式,并提供了该算式在估算中频采样系统时钟信号抖动中的应用实例,间接证明了该算式.The power-law-integral is a commonly formula used to estimate the subpicosecond level jitter of clocks,while the results are determined by the integral-limits,in particular,by the lower limits.The transform formulas from phase noise to jitter are introduced firstly.Then we deduced quantitative relationship between the lower limits,the frequency of sampling clock,the maximum frequency of analog input signals and the effective resolution of analog-to-digital converters,as a result,we provide a formula to estimate the lower limits.Finally,provides a typical application example of the formula.

关 键 词：抖动 相噪 功率谱密度 幂率积分 中频采样 

分 类 号：TN802[电子电信—信息与通信工程] TN792