A 700µW 8-channel EEG/contact-impedance acquisition system for dry-electrodes

Author

Mitra, Srinjoy ; Xu, Jiawei ; Matsumoto, Akinori ; Makinwa, Kofi A A ; Van Hoof, Chris ; Yazicioglu, Refet Firat

Author_Institution

Imec, Leuven, Belgium

fYear

2012

fDate

13-15 June 2012

Firstpage

68

Lastpage

69

Abstract

A 700μW 8-channel active-electrode (AE) based EEG monitoring system is presented. The complete system consists of 9 AEs and a back-end analog signal processor. It is capable of continuously recording EEG signals and electrode-tissue contact impedance (ETI). The EEG channels have 1.2GΩ input impedance, 1.75μVrms noise (0.5-100Hz), 84dB CMRR, and can reject ±250mV of electrode offset, while consuming less than <;87μW (including ETI measurement). The system facilitates ambulatory use and patient comfort, while delivering high quality EEG signals.

Keywords

biological tissues; biomedical electrodes; electroencephalography; AE-EEG monitoring system; EEG channel; EEG signal recording; ETI; back-end analog signal processor; contact-impedance acquisition system; dry-electrodes; eight-channel active-electrode; electrode-tissue contact impedance; frequency 0.5 Hz to 100 Hz; high quality EEG signals; power 700 muW; resistance 1.2 Gohm; voltage -250 mV; voltage 1.75 muV; voltage 250 mV; Electrodes; Electroencephalography; Impedance; Impedance measurement; Monitoring; Noise; EEG; ETI; active electrode;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits (VLSIC), 2012 Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4673-0848-9

Electronic_ISBN

978-1-4673-0845-8

Type

conf

DOI

10.1109/VLSIC.2012.6243793

Filename

6243793