精密低频信号频率与占空比测量电路的设计与应用

The measure circuit design for frequency and duty cycle of low-frequency signal

目的和方法 :介绍一种精密低频信号频率与占空比测量电路的设计以及在神经阈值刺激仪中的应用 ,详细阐述该电路结构、测试结果、误差分析及改进措施。 结果和结论 :该电路具有频率、占空比测量准确、电路简单易实现等优点 ,略加改动 。

Objectives and Methods:To introduce a type of circuit for measuring frequency and duty cycle of low-frequency signal, expatiates on the theory of design, testing result, analysis for error and the measures for improvement. Results and Conclusions:The circuit is precise, easy to carry, and can be used in many systems.