A low-voltage low-power QFG-based Sigma-Delta modulator for electroencephalogram applications

Author

Lopez-Morillo, E. ; Carvajal, R.G. ; Galan, J. ; Ramirez-Angulo, Jaime ; Lopez-Martin, Antonio ; Rodriguez-Villegas, E.

Author_Institution

Escuela Super. de Ing., Seville Univ., Sevilla

fYear

2006

fDate

Nov. 29 2006-Dec. 1 2006

Firstpage

118

Lastpage

121

Abstract

A Sigma-Delta (SigmaDelta) modulator with 10 bits of resolution and only 55 nW power consumption for electroencephalogram (EEG) applications is presented. The overall modulator operates from 1.2 V using Quasi-Floating-Gates (QFG) based circuits. The system has been implemented in a standard 0.5-mum CMOS process. Post-layout simulations have been performed showing 70 dB of SNR with an oversampling ratio of 64.

Keywords

CMOS integrated circuits; biomedical electronics; electroencephalography; low-power electronics; sigma-delta modulation; CMOS process; EEG; SigmaDelta modulator; electroencephalogram; low-voltage low-power QFG; power 55 nW; quasifloating-gates based circuits; sigma-delta modulator; size 0.5 mum; voltage 1.2 V; Application software; Brain modeling; Circuit simulation; Delta-sigma modulation; Electroencephalography; Energy consumption; Filters; Frequency; Signal processing; Strontium;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Circuits and Systems Conference, 2006. BioCAS 2006. IEEE

Conference_Location

London

Print_ISBN

978-1-4244-0436-0

Electronic_ISBN

978-1-4244-0437-7

Type

conf

DOI

10.1109/BIOCAS.2006.4600322

Filename

4600322