说明：  本设计分为四个模块，分别是：信号前向调整模块，数据采集模块，数据输出模块和控制模块。信号前向调整模块采用高速低噪音模拟开关(MAX4545)和宽带运算放大器(MAX817)构成可编程运算放大器，对幅度不等的输入信号分别进行不同等级的放大处理
(The design is divided into four modules, namely: the signal prior to adjustment module, data acquisition module, data output module and control module. Signal adjustment module to the high-speed low-noise analog switch (MAX4545) and broadband operational amplifier (MAX817) constitutes a programmable operational amplifier, the amplitude of the input signal range were dealing with different levels of amplification)