基于单片机和CPLD的频率测量研究

针对单片机进行高频测量存在的响应速度问题,利用CPLD适合精确、高速计数的特点,提出了一种基于单片机和CPLD的频率测量电路,通过CPLD对被测信号分频再与单片机计数值进行比较,实现了高精度、等精度测量,同时又解决了高频测量中存在的问题,满足了系统对响应时间的要求。该项研究成果已经在所设计信号源产品中得到了应用。

Research of Frequency Measurement Based on Single Chip Computer and CPLD

In order to deal with the problem of response rate of single chip computer while measuring high frequency,a frequency measurement circuit based on single chip computer and CPLD is proposed,which realizes high-accuracy measurement by comparing the frequency division of the measured signals with the counting number of single chip computer,which has been applied in funtion generator.