A low-power current-mode front-end acquisition system for biopotential signal recording

Author

Chen, Wei-Ming ; Kuo, Liang-Ting ; Wu, Chung-Yu

Author_Institution

Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2012

fDate

20-23 May 2012

Firstpage

842

Lastpage

845

Abstract

In this paper, a new current-mode front-end amplifier for biopotential signal recording system is proposed. A current-mode preamplifier incorporates with an active feedback loop to bypass any dc current generated by tissues is designed as the first stage. A programmable gain stage and a current-mode filter are designed to adjust both gain and the low-pass cutoff frequency, respectively. The current-mode front-end amplifier is designed and fabricated in 0.18-μm CMOS technology. The measured maximum current gain is 55.9 dB. The high-pass cutoff frequency can achieve as low as 0.3Hz and the low-pass cutoff frequency can be adjusted from 1 KHz to 10 KHz. The measured input-referred noise is 153^fA/_√Hz, and the power consumption is 13 μW at 1-V power supply.

Keywords

CMOS analogue integrated circuits; biomedical electronics; circuit feedback; current-mode circuits; integrated circuit design; medical signal processing; preamplifiers; recording; CMOS technology; DC current; active feedback loop; biopotential signal recording; current-mode filter; current-mode front-end amplifier design; current-mode preamplifier; frequency 1 kHz to 10 kHz; gain 55.9 dB; low-power current-mode front-end acquisition system; power 13 muW; programmable gain stage; size 0.18 mum; tissue; voltage 1 V; Current measurement; Cutoff frequency; Feedback loop; Gain; Noise; Preamplifiers; Semiconductor device measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Conference_Location

Seoul

ISSN

0271-4302

Print_ISBN

978-1-4673-0218-0

Type

conf

DOI

10.1109/ISCAS.2012.6272172

Filename

6272172