A 2μW biomedical frontend with ΣΔ ADC for self-powered U-healthcare devices in 0.18μm CMOS technology

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 de...

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Bibliographic Details
Published in2015 IEEE 13th International New Circuits and Systems Conference (NEWCAS) pp. 1 - 4
Main Authors Jha, Pankaj, Patra, Pravanjan, Naik, Jairaj, Dutta, Ashudeb, Acharya, Amit, Rajalakshmi, P., Singh, Shiv Govind
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2015
Subjects
Detectors
Electrocardiography
Gain control
Modulation
Noise shaping
Power demand
Signal resolution
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Summary: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.
DOI:10.1109/NEWCAS.2015.7182054