四通道胃电检测系统电路设计与实现

目前的胃电检测系统通常是采用前置放大器，滤波电路．主放大器对胃电信号进行缓冲，放大和增益调整，然后经A／D转换后送入单片机进行数据处理和数据存储。整个系统较为复杂，体积较大。在采用数据采集与处理芯片的基础上．结合现代电路的设计方法．提出了一种便携式、小型化的多通道胃电数据采集系统的设计方案。同时设计了符合胃电特点的信号调理电路。该电路针对不同干扰进行滤波．为胃电信号调理电路及其它微弱生物电信号调理电路的研制提供了一种有效的手段。

Design and Implementation of 4-channal Circuit on EGG Detection

The traditional apparatus of electrogastrogram(EGG)adopted pre-amplification,filter and main-amplification to cushion,amplify and exclude the interference to the signal of EGG.Then the signal is transformed by A/D to send into MCU which deals and saves the data.The whole system was complex and is of big bulk.This paper used the data acquisition chip,combined with the means of modern design about circuit and put forward a portable project of multichannel of detection on EGG.At the same time,the circuit is designed to deal with signal which accorded with the trait of EGG.The circuit could exclude the different interference,which offered a effective method for research and development of gastric electrical circuit and other faint biological electrical circuit.