新型4通道单电源低功耗程控接口脑电放大器的研制

A Design of 4-channel Low-Power Single-Supply EEG Amplifier with Digital Interface

本脑电放大器针对现有同类电路缺点进行改进 ,采用了最新一代高性能模拟与混合信号集成电路芯片 ,优化了电路结构并通过精细的电路工艺措施实现了噪声电压 1 9μVp -p、共模抑制比 10 0dB、输入阻抗 80MΩ、基线漂移小、单电源 5V供电和工作电流小于 10mA等电路指标 ,并实现了增益控制和滤波控制的数字化接口。 1年的应用表明该放大器安全省电、体积小、结构简单、性能稳定 ,非常适合作为便携式智能型脑电图仪器的前端。

A design for a novel 4-channel Low-Power Single-Supply EEG amplifier is presented which eliminates several problems in exisiting designs and achives the same high performance in CMRR and input impedance etc.By applying state-of-the-art ICs,the amplifier is be able to operate in single supply mode and has low power consumsion with a standard 5?V-logic interface to microcontroller.These make this amplifier well suited for uses as front end of portable brain machines.