【摘要】 本文主要论述了采用CPLD的设计方法,在数字系统设计精确测量频率测量仪的一种设计:在采样时间内同时对标准频率信号和被测频率信号计数。采样完成后,把二者的计数值相比,再乘以标准频率就可以得到被测频率的精确值。更多还原

【Abstract】 This paper discusses the methods used CPLD design. accurate measurement of frequency in the design of digital systems de- sign : a measuring instrument- Sampling time at the same time and frequency signal to the standard frequency signal count. Sampling is completed, the two numerical terms, multiplied by the standard rate can be accurately measured frequency value.更多还原