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A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program
Published on: April 19, 2019
A Batteryless Motion-Adaptive Heartbeat Detection System-on-Chip Powered by Human Body Heat
Soumya Bose1, Boyu Shen2, Matthew L Johnston2
1The School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA.; Intel Corporation, Hillsboro, OR 97124 USA.
Abstract:
This paper presents a batteryless heartbeat detection system-on-chip (SoC) powered by human body heat. An adaptive threshold generation architecture using pulse-width locked loop (PWLL) is developed to detect heartbeats from electrocardiogram (ECG) in the presence of motion artifacts. The sensing system is autonomously powered by harvesting thermal energy from human body heat using a thermoelectric generator (TEG) coupled to a low-voltage, self-starting boost converter and integrated power management system. The SoC was implemented in a 0.18 μm CMOS process and is fully functional with a minimum input power of 20 μW, provided by a portable TEG at 20 mV with a ~0.5 °C temperature gradient. The complete system demonstrates motion-adaptive, power-autonomous heartbeat detection for sustainable healthcare using wearable devices.
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