Title :
Design of Portable Multi-Channel EEG Signal Acquisition System
Author :
Zhu, Lin ; Chen, Haifeng ; Zhang, Xu ; Guo, Kai ; Wang, ShuJing ; Wang, Yu ; Pei, WeiHua ; Chen, HongDa
Author_Institution :
State Key Lab. on Integrated Optoelectron., Chinese Acad. of Sci., Beijing, China
Abstract :
A portable multi-channel electroencephalography (EEG) signal acquisition system operated by battery is designed in this paper. EEG is a recording of the electrical activity of the brain from the scalp and the recorded waveforms provide insights into the dynamic aspects of brain activity. The amplifier with a bandwidth of 0.8-35 Hz is designed by use of integrated circuits such as the low-power instrumentation amplifier AD623, low-power, high gain operational amplifiers TLC27L4, etc. The amplified EEG signals are digitized by an A/D (analog to digital) converter built-in MSP 430 MCU (micro-controller unit). The digitized signals are transmitted to a PC by a wired serial port or stored in the SD (secure digital) memory card. Experimental results show that the system could implement the acquisition and storage of the EEG signals efficiently. This system would be of benefit to all involved in the use of EEG for clinical diagnosis and monitoring, or even BCI (brain computer interface).
Keywords :
analogue-digital conversion; brain; data acquisition; electroencephalography; instrumentation amplifiers; integrated circuit design; medical signal processing; operational amplifiers; portable instruments; AD623; TLC27L4; analog-to-digital converter; bandwidth 0.8 Hz to 35 Hz; brain activity; brain computer interface application; built-in MSP 430 MCU; clinical diagnosis application; clinical monitoring application; electrical activity; electroencephalography; integrated circuits; low-power instrumentation amplifier; low-power-high-gain operational amplifiers; microcontroller unit; portable multichannel EEG signal acquisition system; recorded waveforms; secure digital memory card; signal acquisition; signal storage; wired serial port; Analog-digital conversion; Bandwidth; Batteries; Brain; Clinical diagnosis; Electroencephalography; Instruments; Operational amplifiers; Scalp; Signal design;
Conference_Titel :
Biomedical Engineering and Informatics, 2009. BMEI '09. 2nd International Conference on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4132-7
Electronic_ISBN :
978-1-4244-4134-1
DOI :
10.1109/BMEI.2009.5304951
