Title :
A compact low-power mixed-signal architecture for powerline interference rejection in biopotential analog front ends
Author :
Prasopsin, P. ; Pholpoke, B. ; Tepwimonpetkun, S. ; Wattanapanitch, W.
Author_Institution :
Dept. of Electr. Eng., Kasetsart Univ., Bangkok, Thailand
Abstract :
This paper proposes a mixed-signal architecture for rejecting strong 50/60 Hz powerline interference (PLI) in biopotential analog front ends (AFEs). The architecture employs a simple least-mean-square algorithm to generate a sinusoidal signal that cancels with the PLI at the AFE´s input. Designed and laid out in a 0.18 μm CMOS process, the architecture occupies an area of 0.07 mm2. At a clock frequency of 20 kHz for rejecting 50-Hz PLI, simulations show that the architecture consumes a total power of 158 nW, making it attractive for implementations in multi-channel biopotential acquisition systems.
Keywords :
bioelectric potentials; electromagnetic interference; least mean squares methods; medical signal detection; CMOS process; biopotential analog front ends; frequency 20 Hz; frequency 50 Hz; least mean square algorithm; low power mixed signal architecture; multichannel biopotential acquisition systems; power 158 nW; powerline interference rejection; Approximation algorithms; Clocks; Electrocardiography; Indexes; Least squares approximations; Radiation detectors; Read only memory;
Conference_Titel :
Biomedical Circuits and Systems Conference (BioCAS), 2014 IEEE
Conference_Location :
Lausanne
DOI :
10.1109/BioCAS.2014.6981696
