Active electrode IC combining EEG, electrical impedance tomography, continuous contact impedance measurement and power supply on a single wire

Author

Guermandi, Marco ; Cardu, Roberto ; Franchi, Eleonora ; Guerrieri, Roberto

Author_Institution

ARCES, Univ. of Bologna, Bologna, Italy

fYear

2011

fDate

12-16 Sept. 2011

Firstpage

335

Lastpage

338

Abstract

The IC presented integrates the front-end for EEG and Electrical Impedance Tomography acquisition on the electrode, together with contact impedance monitoring, so as to improve signal quality and functional integration of the two techniques for brain imaging applications. Only 4 wires connect the electrode to the back-end. The readout circuit consumes 1 mW, while the input referred noise for EEG signal acquisition is 0.45 μV_RMS between 0.5 and 100 Hz, doubling when both EEG and EIT are acquired simultaneously.

Keywords

electric impedance imaging; electrodes; electroencephalography; readout electronics; EEG signal acquisition; active electrode IC combining EEG; brain imaging; contact impedance monitoring; continuous contact impedance measurement; electrical impedance tomography; functional integration; power supply; readout circuit; signal quality; single wire; Electrodes; Electroencephalography; Impedance; Integrated circuits; Mixers; Noise; Tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC (ESSCIRC), 2011 Proceedings of the

Conference_Location

Helsinki

ISSN

1930-8833

Print_ISBN

978-1-4577-0703-2

Electronic_ISBN

1930-8833

Type

conf

DOI

10.1109/ESSCIRC.2011.6044975

Filename

6044975