摘要
基于分时采样原理,设计了一种16GS/s高速数据采集系统。针对采样时钟的差相问题进行了分析,提出了基于PCB蛇行走线的解决方案;在传统四参数正弦拟合算法的基础上提出了一种通过收敛的频率计算方式计算迭代初始值的方法,大大减小了计算量,提高了计算精度。MATLAB仿真结果验证了算法的可行性与精确度。
This paper designed a hardware structure of 16 GSPS high-speed sampling system by applying the time-interleaved sampling systems.After studying the sampling clock,a special PCB alignment method was proposed to solve the clock problem.According to the traditional sin-fit method of 4 parameters,this paper put forward an improved method by which we could calculate the input frequency with convergence,the amount of computation is greatly reduced,and the precision is greatly improved.The simulation on MATLAB has verified the feasibility of the algorithm.
作者
李婷
龚龙庆
肖国尧
LI Ting;GONG Long-qing;XIAO Guo-yao(Xi＇an Microelectronics Technology Institue,Xi＇an 710054,China)
出处
《机械工程与自动化》
2018年第5期145-146,149,共3页
Mechanical Engineering & Automation
关键词
分时采样
差相时钟
正弦拟合
MATLAB仿真
time interleaved sampling
differential phase clock
sin-fit
MATLAB simulation
