Abstract
To optimize energy consumption in wearable sensor networks, an efficient scheme is to set the sensors in sleep mode and wake them up to engage communication. However, synchronicity between the sensors needs to be assured by always-on local oscillators. This work proposes a different topology that takes advantage of the heart beat to wake-up wearable sensors. The electrocardiogram (ECG) is detected by two probes and then converted into a pulse signal. Using 28-nm FD-SOI CMOS technology, this solution is implemented on a circuit consuming 19 nW at a 900 mV supply voltage, hence suitable for long term and wearable applications.
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Acknowledgment
This work has been initiated in the frame of the Human Body Intranet collaborative project between STMicroelectronics, BWRC at UC Berkeley and IEMN. The authors wish to acknowledge Andreia Cathelin, Jan Rabaey and Andreas Kaiser for their support. This work was supported in part by the European CHIST-ERA JEDAI program under number ANR-19-CHR3-0005-01.
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Gautier, A., Dael, M., Benarrouch, R., Larras, B., Frappé, A. (2020). An Ultra-low-Power Integrated Heartbeat Detector for Wearable Sensors. In: Alam, M.M., Hämäläinen, M., Mucchi, L., Niazi, I.K., Le Moullec, Y. (eds) Body Area Networks. Smart IoT and Big Data for Intelligent Health. BODYNETS 2020. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 330. Springer, Cham. https://doi.org/10.1007/978-3-030-64991-3_14
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