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一种脑电信号采集系统前端电路设计与实现
资料介绍
文章设计了提取脑电信号的前端信号采集电路模块,通过脑电极采集到的原始脑电信号经过此电路模块后可实现放大、滤波、除干扰等功能.信号依次通过前置级放大、高通滤波、50 Hz陷波、低通滤波、后置放大等环节,平均幅值50μV的脑电信号经该电路处理后幅值可达1~4V,能满足常规采集卡对模拟信号输入的范围要求.仿真结果表明,利用该电路模块采集的EEG信号失真小,可广泛应用于EEG信号采集与处理的各类设备中.
The acquisition circuit module to extract front-end EEG signals was designed,making it possible to amplify,filter and remove the interference of the source signals collected from the brain electrode.After the signals went through such links as pre-amplification,high-pass filtration,50 Hz wave trapping,low-pass filtration and post-amplification successively,the processed EEG signals featuring 50μV in average can reach to the amplitude from 1Vto 4Vand meet the requirements of the conventional acquisition card to input analog signals.The simulation results show that the signals,as collected through the circuit,are low in distortion.It can be widely used in various devices to collect and process EEG signals.
部分文件列表
| 文件名 | 大小 |
| 一种脑电信号采集系统前端电路设计与实现.pdf | 1004K |
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