An Integrated CMOS Bio-potential Amplifier with a Feed-Forward DC Cancellation Topology

Author

Parthasarathy, Jayant ; Erdman, Arthur G. ; Redish, Aaron D. ; Ziaie, Babak

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN

fYear

2006

fDate

Aug. 30 2006-Sept. 3 2006

Firstpage

2974

Lastpage

2977

Abstract

This paper describes a novel technique to realize an integrated CMOS bio-potential amplifier with a feedforward DC cancellation topology. The amplifier is designed to provide substantial DC cancellation even while amplifying very low frequency signals. More than 80 dB offset rejection ratio is achieved without any external capacitors. The cancellation scheme is robust against process and temperature variations. The amplifier is fabricated through MOSIS AMI 1.5 mum technology (0.05 mm area). Measurement results show a gain of 43.5 dB in the pass band (<1 mHz-5 KHz), an input referred noise of 3.66 muVrms, and a current consumption of 22 muA

Keywords

CMOS integrated circuits; bioelectric potentials; biomedical electronics; biomedical equipment; feedforward amplifiers; neurophysiology; 1.5 micron; 43.5 dB; MOSIS AMI technology; current consumption; feed-forward DC cancellation topology; integrated CMOS bio-potential amplifier; offset rejection ratio; Ambient intelligence; Capacitors; Current measurement; Feedforward systems; Frequency; Gain measurement; Noise robustness; Signal design; Temperature; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE

Conference_Location

New York, NY

ISSN

1557-170X

Print_ISBN

1-4244-0032-5

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/IEMBS.2006.259577

Filename

4462421