A low-voltage low-power front-end for wearable EEG systems

D Yates; E López-Morillo; R G Carvajal; J Ramirez-Angulo; E Rodriguez-Villegas

doi:10.1109/IEMBS.2007.4353533

A low-voltage low-power front-end for wearable EEG systems

Annu Int Conf IEEE Eng Med Biol Soc. 2007:2007:5282-5. doi: 10.1109/IEMBS.2007.4353533.

Authors

D Yates¹, E López-Morillo, R G Carvajal, J Ramirez-Angulo, E Rodriguez-Villegas

Affiliation

¹ Dept. of Electrical and Electronic Engineering, Imperial College, London, UK. d.yates@imperial.ac.uk

PMID: 18003199
DOI: 10.1109/IEMBS.2007.4353533

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 70dB of SNR and an oversampling ratio of 64. The whole system consumes less than 2uW at 1.2V.

Publication types

Evaluation Study
Research Support, Non-U.S. Gov't

MeSH terms

Amplifiers, Electronic*
Analog-Digital Conversion*
Diagnosis, Computer-Assisted / instrumentation*
Diagnosis, Computer-Assisted / methods
Electric Power Supplies*
Electrocardiography, Ambulatory / instrumentation*
Equipment Design
Equipment Failure Analysis
Reproducibility of Results
Sensitivity and Specificity
Signal Processing, Computer-Assisted / instrumentation*