A reconfigurable medically cohesive biomedical front-end with ΣΔ ADC in 0.18µm CMOS

Jha, P and Patra, P and Naik, J and Acharyya, Amit and P, Rajalakshmi and Singh, Shiv Govind and Dutta, Asudeb (2016) A reconfigurable medically cohesive biomedical front-end with ΣΔ ADC in 0.18µm CMOS. In: 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 25-29 Aug, 2015, Milan.

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Abstract

This paper presents a generic programmable analog front-end (AFE) for acquisition and digitization of various biopotential signals. This includes a lead-off detection circuit, an ultra-low current capacitively coupled signal conditioning stage with programmable gain and bandwidth, a new mixed signal automatic gain control (AGC) mechanism and a medically cohesive reconfigurable ΣΔ ADC. The full system is designed in UMC 0.18μm CMOS. The AFE achieves an overall linearity of more 10 bits with 0.47μW power consumption. The ADC provides 2nd order noise-shaping while using single integrator and an ENOB of ~11 bits with 5μW power consumption. The system was successfully verified for various ECG signals from PTB database. This system is intended for portable batteryless u-Healthcare devices.

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IITH Creators:

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