晃动补偿精密时序控制电路设计

Precise Timing Control Method with Jitter Compensation Function

针对目前多路同步控制技术在外触发工作状态下输出信号晃动较大且延时时间分辨低的问题,提出一种具有晃动补偿功能的精密时序控制方法。该方法采用FPGA作为核心控制器对输入触发信号与本地时钟之间晃动进行精确测量,再利用可编程模拟延时芯片实现晃动测量结果实时补偿,从而抑制两者之间的随机晃动。实验表明:该方法可以在ns到百μs量级时间范围内,将外触发信号与时钟基准信号之间的晃动控制在330 ps以内。

In view of the existing multi- channel synchronous control technology which had a problem with large time jitter and low delay time resolution under external trigger working state,this paper presents a precise timing control method with jitter compensation function. This method is based on FPGA as the core controller to accurately measure jitter between trigger signal and local clock,and then utilize programmable analogy delay chip to compensate measurement results. Experimental results show that this approach can restrain the random jitter between trigger signal and local clock within 330 ps from the nanosecond to hundred microsecond time range.