【摘要】 介绍一种多路频率信号自动采集电路，由具有多路模拟开关的信号调理电路和频率采集接口板构成．频率采集接口板由商品化的可编程定时／计数和数字量输入输出板改造而成．具有价格低廉，使用方便等优点，可满足实验要求．更多还原

【Abstract】 This paper reports a circuit for sampling multiple frequency signals automatically which composes of a signal conditioning circuit with multiple analogue switch and of a frequency acquisition board. Commercialized programmable digital input/output and timer board is modified for frequency acquisition board which is cheap and of the easy-to-use advantage. Thecircuit can meet the experiment requirements.更多还原