DocumentCode :
3637318
Title :
A low-power CMOS continuous-time LMS adaptive filter with robust DC-offset cancellation
Author :
Xinwang Zhang;Sina Balkir;Michael W. Hoffman;Nathan Schemm
Author_Institution :
University of Nebraska-Lincoln, Department of Electrical Engineering, 209N WSEC, 68588-0511, USA
fYear :
2010
Firstpage :
977
Lastpage :
980
Abstract :
Continuous-time LMS (CTLMS) adaptive filter regains researchers´ attention and interest because of its capability of high frequency signal processing. Its advantages of power efficiency and circuitry simplicity make it even more attractive to be applied in communication systems and sensor systems. However, the filtering performance of CTLMS implementation is severely affected by the DC offset caused by the mismatches of the fabricated circuit. To address this problem, this paper proposes a CMOS, low power, continuous-time weight-updating circuit topology with an auto-zeroed multiplier and integrator to cancel the DC offset. Simulation results of a 6 taps transversal adaptive filter utilizing this circuit structure is presented to verify its effectiveness.
Keywords :
"Least squares approximation","Adaptive filters","Robustness","Circuits","Interference","CMOS technology","Delay","Frequency","Transversal filters","Adaptive signal processing"
Publisher :
ieee
Conference_Titel :
Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on
ISSN :
1548-3746
Print_ISBN :
978-1-4244-7771-5
Type :
conf
DOI :
10.1109/MWSCAS.2010.5548798
Filename :
5548798
Link To Document :
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