十六路脑电信号预处理器的设计  

Design of 16-channel EEG signals preprocessor

作　　者：荆西京[1] 王健琪[1] 冀飞[1] 宋志奇[1] 

机构地区：[1]第四军医大学,西安市710032

出　　处：《医疗卫生装备》2004年第4期4-4,7,共2页Chinese Medical Equipment Journal

摘　　要：为检测大白鼠的脑皮层神经电信号,开发了十六通道脑电信号预处理器,对原始的脑电信号进行放大、滤波处理,为A/D转换器提供具有适当幅度、高信噪比的信号。设计中针对大白鼠脑电信号低频率、弱信号、强噪声和干扰背景等特点采取了相应的措施,特别强调了高增益条件下电路的低噪声、低失调电压、低增益误差和高共模抑制比性能。In order to check out the cortical EEG signals of conscious and/or anesthetized rats, a 16-channel analog signals preprocessor is developed. This preprocessor can amplify and filter the primal EEG signals to transform them into ones with proper altitudes and high SNRs, and then they will be sent to the A.D converter. Some measures are taken in view of the signals' low frequencies, low SNRs and background with strong interference. When high gain made, such performances of the circuit are emphasized as low noise, low offset voltage, low gain error and heightened CMRR.

关 键 词：脑电信号 预处理器 噪声 低失调电压 工作原理 

分 类 号：TH772[机械工程—仪器科学与技术] TP391[机械工程—精密仪器及机械]