Title :
A portable EEG recording system
Author :
Drakulic, Budimir S. ; Berry, Stephen J. ; Sterman, Maurice B.
Author_Institution :
California Univ., Los Angeles, CA, USA
Abstract :
A portable analog signal processing unit suitable for ambulatory and in-flight electroencephalogram (EEG) recording is described. The system includes miniature preamplifiers, mounted near the electrodes; amplifiers, filters, and a power supply, in a single unit; and a small FM data recorder. The preamplifier module has a very-low-noise FET input, a high-pass filter, and a differential amplifier with high common mode rejection ratio. The amplifier module consists of an isolation amplifier, a variable-gain amplifier and a bandpass filter, providing subject/ground isolation, additional gain, and antialiasing. With this system, movement, muscle and other recording artifacts are significantly reduced and a high signal-to noise ratio is achieved
Keywords :
biomedical equipment; electroencephalography; signal processing; antialiasing; bandpass filter; differential amplifier; gain; high-pass filter; isolation amplifier; medical instrumentation; miniature preamplifiers; muscle; portable EEG recording system; portable analog signal processing unit; power supply; signal-to noise ratio; small FM data recorder; variable-gain amplifier; very-low-noise FET input; Band pass filters; Differential amplifiers; Electrodes; Electroencephalography; FETs; Power amplifiers; Power filters; Power supplies; Preamplifiers; Signal processing;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96258
