基于脑－机接口的脑电信号前置放大电路设计
esign of Preamplifier Circuit for EEG Signal based on the BCI System
基于经典的仪表放大器基本框架,改进和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,对被测的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BCI系统中。
Based on the structure of classical instrumental amplifier, a preamplifier for the measurement of EEG signals is improved and designed. According to the characteristics in the EEG signal collection，we add a radio filter、a right-leg -driven circuit、a high-pass filter with reverse feedback and so on, which makes the CMRR of the preamplifier 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 BCI system..
张道信、吴小培、张磊
电子电路电子技术应用
脑电图放大器共模抑制比增益滤波
Electroencephalographyamplifiercommon mode rejection ratiogainfilter
张道信,吴小培,张磊.基于脑－机接口的脑电信号前置放大电路设计[EB/OL].(2008-03-20)[2025-08-11].http://www.paper.edu.cn/releasepaper/content/200803-566.点此复制
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