Title :
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
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;
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
DOI :
10.1109/VLSIC.2012.6243793
