S. Mitra, Jiawei Xu, Akinori Matsumoto, K. Makinwa, C. Hoof, R. Yazicioglu
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A 700µW 8-channel EEG/contact-impedance acquisition system for dry-electrodes
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.
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