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基于脑-机接口中的脑电信号前置放大电路设计

发表时间:2009-02-28  浏览量:2109  下载量:1015
全部作者: 张磊,张道信,吴小培
作者单位: 安徽大学计算智能与信号处理教育部重点实验室
摘 要: 基于经典的仪表放大器基本框架,设计了一种可用于脑电信号采集的前置放大器。根据脑电信号采集的特点,通过增加射频滤波器、共模抑制电路和高通负反馈滤波器等措施,提高了放大器的共模抑制比,并且对被测人体具有更安全的保护作用。结果表明:该放大器在频率响应特性、共模抑制比等性能参数方面符合要求,确保了输出脑电信号的低失真,可用于脑-机接口(brain-computer interface, BCI)系统中。
关 键 词: 计算机应用;脑电图;放大器;共模抑制比;增益;滤波
Title: Pre-amplifier design of EEG signal for the BCI system
Author: ZHANG Lei, ZHANG Daoxin, WU Xiaopei
Organization: Key Laboratory of Intelligent Computing & Signal Processing of Ministry of Education, Anhui University
Abstract: Based on the structure of classical instrumental amplifier, a pre-amplifier for the measurement of electroencephalogram (EEG) signals is designed. According to the characteristics in the EEG. signal collection, a radio frequency filter, a common mode rejection circuit, a high-pass filter with reverse feedback and so on are added, which makes the common mode rejection ratio(CMRR) of the pre-amplifier higher and safer for the detected person. The results indicate that the frequency response and CMRR meet the standard, ensuring low distortion of the output EEG signal and making it suitable for the brain-computer interface (BCI) system.�
Key words: computer application; electroencephalogram; amplifier; common mode rejection ratio; gain; filter
发表期数: 2009年2月第4期
引用格式: 张磊,张道信,吴小培. 基于脑-机接口中的脑电信号前置放大电路设计[J]. 中国科技论文在线精品论文,2009,2(4):411-417.
 
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