Programmable ExG Biopotential Front-End IC for Wearable Applications

Author

Shin-Lian Teng ; Rieger, Robert ; Yu-Bin Lin

Author_Institution

Electr. Eng. Dept., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

8

Issue

4

fYear

2014

fDate

Aug. 2014

Firstpage

543

Lastpage

551

Abstract

This paper presents a configurable CMOS integrated circuit front-end for the recording of a wide range of biopotentials (ExG). The system offers a choice between a single-differential or double-differential recording channel topology, wide continuously adjustable gain range (37-66 dB), selectable CMOS or BJT input stages, offset compensation, differential and buffered single-ended voltage output. Measured results from a prototype manufactured in 0.35 μm CMOS technology are presented. Practical recording examples of the electrocardiogram (ECG) and electromyogram (EMG) confirm its operation. The chip consumes between 110 and 324 μW depending on configuration, occupies a core area of 0.16 mm², achieves a CMRR > 97 dB, and 21 nV/√Hz input-referred noise. The chip is suited for combination with a microcontroller in long-term wearable physiological sensing applications.

Keywords

CMOS integrated circuits; biomedical electronics; biomedical equipment; electrocardiography; electromyography; programmable circuits; CMRR; ECG; EMG; adjustable gain range; configurable CMOS integrated circuit front-end; electrocardiogram; electromyogram; long-term wearable physiological sensing; microcontroller; programmable ExG biopotential front-end IC; size 0.35 mum; Capacitors; Clocks; Gain; Immune system; Noise; Transconductance; Transistors; Biopotential recording; double-differential recording; integrated circuit; programmable circuit;

fLanguage

English

Journal_Title

Biomedical Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

1932-4545

Type

jour

DOI

10.1109/TBCAS.2013.2285567

Filename

6689339