心电信号采集电路的设计  

Design of the detection circuit for electrocardio-signal

作　　者：师彦荣[1,2] 胡进峰[1] 

机构地区：[1]电子科技大学电子工程学院 [2]四川理工学院自电学院

出　　处：《电子世界》2012年第18期109-110,共2页Electronics World

摘　　要：心电信号是人类最早研究生物电信号之一,并较早的应用到医学临床。本文根据心电信号的低频率、低幅值和人体高阻抗等特点,设计了一个用于心电信号采集的电路。该电路主要由传感器电极、右腿驱动电路、前置放大电路、低通滤波电路、高通滤波电路、50Hz陷波电路以及后置放大电路组成。该电路较好的降低了共模信号的干扰以及工频干扰,可以采集到较好的心电信号。The ECG is one of the bioelectrical signals that are researched and used in clinical medicine early.A detection circuit for electrocardio-signal was designed on the basis of the characteristics of electrocardio-signal that is low frequency, small amplitude and high resistance of body.It included electrodes, driven-fight-leg circuit, Pre-amplifier circuit, Low pass filter circuit, High pass filter circuit, 50Hz rejector circuit and Post amplifier circuit.It can be extracted from human body satisfactorily, because of dislodging the common-mode signal and power frequency.

关 键 词：心电信号 右腿驱动电路 滤波电路 放大电路 

分 类 号：TN722.71[电子电信—电路与系统]