【摘要】 介绍了应用ＡＨＤＬ技术设计带有自动量程切换功能的频率测量电路的方法。详细叙述了其工作原理和设计思想，并用复杂可编程器件ＣＰＬＤ予以实现。更多还原

【Abstract】 This paper introduces a method to design frequency measuring circuit with the function of automatic range change by employing AHDL technology and describes in detail its working principle, designing thought and ways to realize by using Complex Programmable Logic Device (CPLD).更多还原