A low-power 84-dB dynamic-range tunable Gm-C filter for bio-signal acquisition

Author

Junjie Lu ; Tan Yang ; Jahan, Md Sarwar ; Holleman, Jeremy

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Tennessee, Knoxville, TN, USA

fYear

2014

fDate

3-6 Aug. 2014

Firstpage

1029

Lastpage

1032

Abstract

A tunable Gm-C filter is presented for bio-signal acquisition application. It incorporates linear tunable transconductors utilizing MOSFETs biased in the triode region. Both the filter architecture and transconductor circuit design are optimized for good tuning, linearity and noise performance with low power consumption. The filter was fabricated in a 0.6 μm BiCMOS process, occupying 0.17 mm². Measurement results show a tuning range of cut-off frequency from 2.5 kHz to 10 kHz. At 5 kHz cut-off frequency, the filter achieves a dynamic range of 85 dB with 1% THD, and consumes 75.9 μW from 3.3 V supply.

Keywords

BiCMOS integrated circuits; bioelectric potentials; circuit tuning; low-power electronics; medical signal detection; power consumption; radiofrequency filters; signal detection; BiCMOS process; MOSFETs; THD; biosignal acquisition; filter architecture; frequency 2.5 kHz to 10 kHz; linear tunable transconductors; low power consumption; low-power dynamic-range tunable Gm-C filter; noise performance; power 75.9 muW; size 0.6 mum; transconductor circuit design; triode region; voltage 3.3 V; Gm-C filter; bio-signal acquisition; transconductor;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on

Conference_Location

College Station, TX

ISSN

1548-3746

Print_ISBN

978-1-4799-4134-6

Type

conf

DOI

10.1109/MWSCAS.2014.6908593

Filename

6908593