A Low-Voltage Low-Power Front-End for Wearable EEG Systems

Author

Yates, D. ; Lopez-Morillo, E. ; Carvajal, R.G. ; Ramirez-Angulo, Jaime ; Rodriguez-Villegas, Esther

Author_Institution

Imperial Coll. London, London

fYear

2007

fDate

22-26 Aug. 2007

Firstpage

5282

Lastpage

5285

Abstract

A low-voltage and low-power front-end for miniaturized, wearable EEG systems is presented. The instrumentation amplifier, which removes the electrode drift and conditions the signal for a 10-bit A/D converter, combines a chopping strategy with quasi-FGMOS (QFG) transistors to minimize low frequency noise whilst enabling operation at 1 V supply. QFG devices are also key to the A/D converter operating at 1.2 V with 70 dB of SNR and an oversampling ratio of 64. The whole system consumes less than 2 muW at 1.2 V.

Keywords

MOSFET; analogue-digital conversion; bioMEMS; biomedical electrodes; biomedical electronics; electroencephalography; instrumentation amplifiers; low-power electronics; medical signal processing; A-D converter; electrode drift removal; electroencephalography; instrumentation amplifier; low frequency noise filtering; low-voltage low-power front-end system; miniaturized wearable EEG systems; quasiFGMOS transistors; voltage 1 V; voltage 1.2 V; Computerized monitoring; Electrodes; Electroencephalography; Energy consumption; Frequency conversion; Instruments; Power amplifiers; Power supplies; Scalp; Voltage; Amplifiers, Electronic; Analog-Digital Conversion; Diagnosis, Computer-Assisted; Electric Power Supplies; Electrocardiography, Ambulatory; Equipment Design; Equipment Failure Analysis; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE

Conference_Location

Lyon

ISSN

1557-170X

Print_ISBN

978-1-4244-0787-3

Type

conf

DOI

10.1109/IEMBS.2007.4353533

Filename

4353533