It introduces the overall design of the system in chapter two, formed mostly with precondition of pulse, enlarge signal, Low-Pass Filter, AD Conversion, Serial Communication, waveform showing etc.
第二章介绍了系统的总体设计方案，它主要由脉搏信号预处理、信号放大、低通滤波、AD转换、串行通信、波形显示等几部分组成。
youdao