A Reconfigurable Medically Cohesive Biomedical Front-End with Sigma Delta ADC in 0.18 mu m CMOS

Jha, P and Patra, P and Naik, J and Acharyya, Amit and P, Rajalakshmi and Singh, Shiv Govind and Dutta, Asudeb (2015) A Reconfigurable Medically Cohesive Biomedical Front-End with Sigma Delta ADC in 0.18 mu m CMOS. In: 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 25-29 Aug, 2015, Milan, Italy.

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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 Sigma Delta ADC. The full system is designed in UMC 0.18 mu m CMOS. The AFE achieves an overall linearity of more 10 bits with 0.47 mu W power consumption. The ADC provides 2nd order noise-shaping while using single integrator and an ENOB of similar to 11 bits with 5 mu W 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