A 2μW Biomedical Frontend with ADC for Selfpowered u-Healthcare Devices in 0.18μm CMOS

Jha, Pankaj and Patra, Pravanjan and Naik, Jairaj and Dutta, Ashudeb et. al. (2015) A 2μW Biomedical Frontend with ADC for Selfpowered u-Healthcare Devices in 0.18μm CMOS. In: IEEE 13th International New Circuits and Systems Conference (NEWCAS), 7-10 June 2015, Grenoble, France.

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Abstract

This paper presents an ultra-low power analog front end (AFE) with ΣΔ modulator ADC meant for acquisition of biopotential signals. The system consists of a signal conditioning stage with programmable gain and bandwidth, a mixed signal automatic gain control (AGC), and a ΣΔ ADC. The full system is designed in UMC 18μm CMOS. The AFE achieves an overall linearity of more 10 bits with 0.47μW power consumption. The ADC provides 2 nd order noise shaping while using single integrator and an ENOB of ~12 bits with 1.4μW power consumption. The system was successfully tested for a ECG signal from PTB database.

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IITH Creators:

IITH Creators	ORCiD
Singh, Shiv Govind	http://orcid.org/0000-0001-7319-879X
Rajalakshmi, P	UNSPECIFIED
Dutta, Asudeb	UNSPECIFIED
Acharyya, Amit	http://orcid.org/0000-0002-5636-0676