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. 2021 May 31;8(2):e25996. doi: 10.2196/25996

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©Ahmed Raza Malik, Jennifer Boger. Originally published in JMIR Rehabilitation and Assistive Technology (https://rehab.jmir.org), 31.05.2021.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Rehabilitation and Assistive Technology, is properly cited. The complete bibliographic information, a link to the original publication on https://rehab.jmir.org/, as well as this copyright and license information must be included.

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The analog signal-conditioning circuit. BCG: ballistocardiography; IN-AMP: instrumentation amplifier; REF: reference; Vout: output voltage.