A 0.09 [Formula Omitted]W Low Power Front-End Biopotential Amplifier for Biosignal Recording

This work presents a biopotential front-end amplifier in which the MOS transistors are biased in subthreshold region with a supply voltage and current of 0.4-0.8 V and 0.23-1.86 [Formula Omitted]A, respectively, to reduce the system power. Flicker noise is then removed using a chopping technique, an...

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Bibliographic Details
Published in:IEEE transactions on biomedical circuits and systems 2012-10, Vol.6 (5), p.508
Main Authors: Tseng, Yuhwai, Ho, Yingchieh, Kao, Shuoting, Su, Chauchin
Format: Article
Language:English
Online Access:Get full text
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Summary:This work presents a biopotential front-end amplifier in which the MOS transistors are biased in subthreshold region with a supply voltage and current of 0.4-0.8 V and 0.23-1.86 [Formula Omitted]A, respectively, to reduce the system power. Flicker noise is then removed using a chopping technique, and differential interference produced by electrode impedance imbalance is suppressed using a Gm-C filter. Additionally, the circuit is fabricated using TSMC 0.18 [Formula Omitted]m CMOS technology with a core area of 0.77[Formula Omitted]0.36 mm[Formula Omitted]. With a minimum supply voltage of 0.4 V, the measured SNR and power consumption of the proposed IC chip are 54.1 dB and 0.09 [Formula Omitted]W , respectively.
ISSN:1932-4545
1940-9990
DOI:10.1109/TBCAS.2012.2188029