生物电放大器实验系统的构建与分析  

Construction and Analysis of Bio-amplifier Experiment System

作　　者：郝丽俊[1] 莫国民[1] 董冠群[1] 

机构地区：[1]上海医疗器械高等专科学校医用电子信息系,上海200093

出　　处：《医疗卫生装备》2012年第1期16-18,46,共4页Chinese Medical Equipment Journal

基　　金：上海市教育委员会和上海市教育发展基金会(2008CGB02)

摘　　要：目的:设计一种小型的生物电隔离放大器实验系统。方法:应用AD8132、AD620、TLP512-1等构成放大电路的核心部分。结果:输入阻抗大于10 GΩ;共模抑制比>80 dB;50 Hz陷波电路的上限截止频率为55.3 Hz,下限截止频率为44.5 Hz。结论:实验系统具有高输入阻抗、高共模抑制比等特点,便于测量,有助于学生对生物电放大器的学习。Objective To design a small experiment system for bio- amplifier. Methods The core circuit for the system was constructed using AD8132,AD620 and TLP512-1. Results Input impedance was more than 10 GΩ, the common-code rejection ratio（CMRR） was more than 80 dB, the upper cut-off frequency was 55.3Hz and the upper cut-off frequency was 44.5Hz for the 50Hz trap filter. Conclusion The experiment system has the characters of high CMRR,high input impedance and being easy to measure, which is helpful for the students to study bio-amplifier.

关 键 词：生物电放大器 AD620 调制解调 50Hz陷波 

分 类 号：R318.6[医药卫生—生物医学工程] R444[医药卫生—基础医学]