面向数字时钟调相的高精度低跃变控制码设计  

A high precision and low amplitude variation phase interpolation coding method for digital phase-modulated clocks

作　　者：吴雪莹 管武 邱昕[1] WU Xue-ying;GUAN Wu;QIU Xin(Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100029,China;Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]中国科学院微电子研究所,北京100029 [2]北京邮电大学,北京100876

出　　处：《信息技术》2024年第4期131-136,共6页Information Technology

基　　金：国家重点研发计划(2018YFB2201502)。

摘　　要：面向数字时钟调相系统,提出了一种相位插值控制码匹配方法,减少了相邻相位之间控制码变化的位数,减小了相位误差和幅度跃变。通过迭代的思想,同时平衡控制码跳变所带来的误差与相位调整之间的转换关系,并行考虑控制码对输出信号幅度的影响,实现相位误差更小的电路结构。仿真结果表明,在文中的控制码调相下,电路输出时钟信号的幅度跃变小于6%。For digital phase-modulated clocks system,a phase interpolation coding method is proposed,which reduces the number of changing bits between adjacent phases,and decreases the phase error and the amplitude variation.Through the iterative idea,balancing the conversion relationship between the error caused by the control code hopping and the phase adjustment,as well as the influence of the control code towards the amplitude of the output signal,the circuit structure with smaller phase error is realized.The simulation results show that under this coding structure,the amplitude variation of the phase-modulated clock is less than 6%.

关 键 词：数字时钟调相 相位插值 控制码 高精度 低跃变 

分 类 号：TN919[电子电信—通信与信息系统]