4-Channel asynchronous bio-potential recording system

Author

Tang, Wei ; Huang, Chenxi ; Kim, Dongsoo ; Martini, Berin ; Culurciello, Eugenio

Author_Institution

Electr. Eng. Dept., Yale Univ., New Haven, CT, USA

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

953

Lastpage

956

Abstract

We present a 4-channel bio-potential recording system using asynchronous delta analog-to-digital converter. The system is designed to reduce the amount of data in neuro-physiological sensors. The circuit includes low-power low-noise amplifiers with asynchronous delta modulators. The analog front end offers a gain of 53 dB within bandwidth of 200 Hz-20 kHz. In this asynchronous data converter, the minimum input-referred delta resolution is 4μV. The input-referred rms noise is 2μV. T h e system was fabricated with AMI 0.5μm CMOS technology. The chip size is 1.5mm by 1.5mm. The power consumption of the 4-channel system with 3.3V supply is 118.8μW in static state and 501.6μW with 240kbps data conversion rate. A graphic user interface was developed to monitor the transmitted signal in real time.

Keywords

CMOS digital integrated circuits; analogue-digital conversion; asynchronous circuits; biomedical equipment; recording; sensors; 4-channel asynchronous biopotential recording system; AMI CMOS technology; asynchronous data converter; asynchronous delta analog-to-digital converter; asynchronous delta modulators; bandwidth 200 Hz to 20 kHz; bit rate 240 kbit/s; data conversion rate; gain 53 dB; graphic user interface; input-referred RMS noise; low-power low-noise amplifiers; minimum input-referred delta resolution; neurophysiological sensors; power 118.8 muW; power 501.6 muW; power consumption; size 0.5 mum; voltage 2 muV; voltage 3.3 V; voltage 4 muV; Ambient intelligence; Analog-digital conversion; Bandwidth; Biosensors; CMOS technology; Circuit noise; Delta modulation; Gain; Low-noise amplifiers; Sensor systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on

Conference_Location

Paris

Print_ISBN

978-1-4244-5308-5

Electronic_ISBN

978-1-4244-5309-2

Type

conf

DOI

10.1109/ISCAS.2010.5537389

Filename

5537389