An ultra-low-power filtering technique for biomedical applications

Tan-Tan Zhang; Pui-In Mak; Mang-I Vai; Peng-Un Mak; Feng Wan; R P Martins

doi:10.1109/IEMBS.2011.6090528

An ultra-low-power filtering technique for biomedical applications

Annu Int Conf IEEE Eng Med Biol Soc. 2011:2011:1859-62. doi: 10.1109/IEMBS.2011.6090528.

Authors

Tan-Tan Zhang¹, Pui-In Mak, Mang-I Vai, Peng-Un Mak, Feng Wan, R P Martins

Affiliation

¹ Biomedical Engineering Laboratory, FST and State-Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macao, China.

PMID: 22254692
DOI: 10.1109/IEMBS.2011.6090528

Abstract

This paper describes an ultra-low-power filtering technique for biomedical applications designated as T-wave sensing in heart-activities detection systems. The topology is based on a source-follower-based Biquad operating in the sub-threshold region. With the intrinsic advantages of simplicity and high linearity of the source-follower, ultra-low-cutoff filtering can be achieved, simultaneously with ultra low power and good linearity. An 8(th)-order 2.4-Hz lowpass filter design example optimized in a 0.35-μm CMOS process was designed achieving over 85-dB dynamic range, 74-dB stopband attenuation and consuming only 0.36 nW at a 3-V supply.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Amplifiers, Electronic*
Computer-Aided Design
Electric Power Supplies*
Electrocardiography / instrumentation*
Electronics / instrumentation*
Equipment Design
Equipment Failure Analysis
Reproducibility of Results
Sensitivity and Specificity