Title :
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
fDate :
Aug. 30 2006-Sept. 3 2006
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE
Conference_Location :
New York, NY
Print_ISBN :
1-4244-0032-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2006.259577
