基于单片机线性F/V转换系统的设计与实现

On the Design and Implementation of Special Linear F/V Switching System Based on SCM

研究了一种线性F∕V转换系统。利用单片机来检测正弦波的频率,根据检测的频率确定D/A转换的数字量,控制TLC5615串行D/A芯片将频率信号转变为电压信号,使输出电压与频率大小呈线性关系,而且它们的线性关系是不经过原点的直线,而现有的F/V转换的器件都不能满足这种要求。

This research is about the F/V switching system.SCM is used to detect sine wave frequency,determine the digital quantity of D/A transformation according to the testing frequency,control TLC5615 serial D/A chips which convert transformation frequency signal into voltage signal,making the linear relationship between the output voltage and the frequency size.This linear should be the one which does not go through the origin.While the existing F/V switching devices cannot satisfy the special requirement