摘要
介绍一种基于标准脉冲信号发生电路的数字频率计的设计方法.该数字频率计主要由SPG8650B构成的时基电路、74LS221构成的逻辑控制电路及MM74C925所构成的计数锁存和译码电路组成.通过实验教学中的实际应用检测,在频率0-9999KHz范围内,测试性能稳定,精度较高,具有一定的实用性.
The methods are introduced to design a digital frequency meter based on the standard pulse signal circuit.The digital frequency meter composed mainly of SPG8650B time base circuitry,74LS221 form of logic control circuit and MM74C925 posed count latch and decoding circuit.Experimental Teaching through the practical application of detection,in the frequency range 0-9999KHz,test performance is stable and accurate,has a certain practicality.
出处
《漳州师范学院学报（自然科学版）》
2011年第3期30-32,共3页
Journal of ZhangZhou Teachers College（Natural Science)
基金
福建省自然科学基金计划资助项目(2008J0036)
漳州师范学院科学研究资助项目(SK09009)
