A 0.5 V 68 nW ECG Monitoring Analog Front-End for Arrhythmia Diagnosis
AbstractThis paper presents a power efficient analog front-end (AFE) for electrocardiogram (ECG) signal monitoring and arrhythmia diagnosis. The AFE uses low-noise and low-power circuit design methodologies and aggressive voltage scaling to satisfy both the low power consumption and low input-referred noise requirements of ECG signal acquisition systems. The AFE was realized with a three-stage fully differential AC-coupled amplifier, and it provides bio-signal acquisition with programmable gain and bandwidth. The AFE was implemented in a 130 nm CMOS process, and it has a measured tunable mid-band gain from 31 to 52 dB with tunable low-pass and high-pass corner frequencies. Under only 0.5 V supply voltage, it consumes 68 nW of power with an input-referred noise of 2.8 µVrms and a power efficiency factor (PEF) of 3.9, which makes it very suitable for energy-harvesting applications. The low-noise 68nW AFE was also integrated on a self-powered physiological monitoring System on Chip (SoC) that is used to capture ECG bio-signals. Heart rate extraction (R-R) detection algorithms were implemented and utilized to analyze the ECG data received by the AFE, showing the feasibility of <100 nW AFE for continuous ECG monitoring applications. View Full-Text
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Kosari, A.; Breiholz, J.; Liu, N.; Calhoun, B.H.; Wentzloff, D.D. A 0.5 V 68 nW ECG Monitoring Analog Front-End for Arrhythmia Diagnosis. J. Low Power Electron. Appl. 2018, 8, 27.
Kosari A, Breiholz J, Liu N, Calhoun BH, Wentzloff DD. A 0.5 V 68 nW ECG Monitoring Analog Front-End for Arrhythmia Diagnosis. Journal of Low Power Electronics and Applications. 2018; 8(3):27.Chicago/Turabian Style
Kosari, Avish; Breiholz, Jacob; Liu, NingXi; Calhoun, Benton H.; Wentzloff, David D. 2018. "A 0.5 V 68 nW ECG Monitoring Analog Front-End for Arrhythmia Diagnosis." J. Low Power Electron. Appl. 8, no. 3: 27.
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