CPLD在多路定时信号处理中的应用

CPLD in the multi-channel timing signal processing application

本文主要介绍了CPLD在多路定时信号处理中的应用。针对大型核物理实验中的符合测量、多路时间测量系统中的门控快定时信号等应用的需要,设计了一种多路延迟/脉宽调节电路.主要功能是对输入的多路快信号进行延迟和脉宽调节,支持NIM负信号输入和输出,在系统主时钟频率为100MHz的时候,延迟和脉宽调节的最小步进精度为10ns。我们采用复杂可编程逻辑器件CPLD来构建系统的主要电路,具有较小的延迟和脉宽调节误差,和常规逻辑器件相比其特点是:元件少且成本低,功耗小,稳定性好。

This paper mainly introduces CPLD in the multi-channel timing signal processing application. We designed the multi-channel delay and pulse adjustment circuit based on CPLD providing a solution to fast gating timing and delay problems in large nuclear physic experiments. Its main function is accepting a negative NIM trigger input, and outputting a pulse with adjustable delay and width. Minimum step accuracy of the delay and the pulse adjustment is 10ns when the system frequency is 100MHz. We use CPLD to construct the main circuit which has less error of the delay and pulse adjustment. Compared the circuit constructed by general devices, the multi-channel delay and pulse adjustment circuit has such features as less components and lower cost, lower dissipation, good stability.