Wide dynamic range 653 nW CMOS neurophysiological signal recording micro-brain-implant with opamp sharing technique

Author

Poustinchi, Mohammad ; Stacey, R. Greg ; Musallam, Sam

Author_Institution

Electr. & Comput. Eng. Dept., McGill Univ., Montreal, QC, Canada

fYear

2014

fDate

3-6 Aug. 2014

Firstpage

647

Lastpage

650

Abstract

In this paper we present a low power, low noise CMOS micro-brain-implant which records both brain´s electrical and chemical activities. We minimized the power consumption and silicon area by exploiting opamp sharing technique. This wide dynamic range (85 dB) micro device consists of a single nano-watt power amplifier for both micromolar neurotransmitter sensing and micro voltage action-potential recording. It digitizes the signal to ten bits using a first order delta-sigma analog-to-digital-convertor, all fabricated in TSMC CMOS-0.18 technology. This microsystem is validated applying neurophysiological signals.

Keywords

CMOS analogue integrated circuits; CMOS digital integrated circuits; bioMEMS; bioelectric potentials; biomedical telemetry; body sensor networks; low noise amplifiers; low-power electronics; medical signal processing; microfabrication; microsensors; neurophysiology; power amplifiers; power consumption; prosthetic power supplies; sigma-delta modulation; TSMC CMOS-0.18 technology; brain chemical activities; brain electrical activities; first order delta-sigma analog-to-digital-convertor; low power-low noise CMOS microbrain implant; micromolar neurotransmitter sensing; microvoltage action-potential recording; opamp sharing technique; power 653 nW; power consumption; silicon area; single nanowatt power amplifier; wide dynamic range 653 nW CMOS neurophysiological signal recording microbrain implant; Bandwidth; CMOS integrated circuits; Electric potential; Neurotransmitters; Power dissipation; Prosthetics; Sensors; Action Potential; Analog to Digital Convertor; Brain Bio-Signal Measurement; Current Conveyor; Microsystem; Neural Amplifier; Neural Prosthetic; Neurotransmitter; Power Efficient; Time-Sharing Opamp Technique;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on

Conference_Location

College Station, TX

ISSN

1548-3746

Print_ISBN

978-1-4799-4134-6

Type

conf

DOI

10.1109/MWSCAS.2014.6908498

Filename

6908498