A low-voltage low-power front-end for wearable EEG systems.
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.
Yates
D
D
Dept. of Electrical and Electronic Engineering, Imperial College, London, UK. d.yates@imperial.ac.uk
López-Morillo
E
E
Carvajal
R G
RG
Ramirez-Angulo
J
J
Rodriguez-Villegas
E
E
D000669:Amplifiers, Electronic; D000703:Analog-Digital Conversion; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D011211:Electric Power Supplies; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*