A Low-Power, Dual-Wavelength Photoplethysmogram (PPG) SoC With Static and Time-Varying Interferer Removal

作者：Winokur Eric S^*; O'Dwyer Tom; Sodini Charles G

来源：IEEE Transactions on Biomedical Circuits and Systems, 2015, 9(4): 581-589.

DOI：10.1109/TBCAS.2014.2358673

• Interferer
• low-power
• mixed-signal
• photoplethysmogram (PPG)
• wearable devices

This paper presents a low-power, reflectance-mode photoplethysmogram (PPG) front end with up to 100 mu A of static interferer current removal and 87 dB attenuation of time-varying interferers. The chip nominally consumes 425 mu W including signal chain circuits, red and IR LED drive power, clocks, digitization and I/O. Measured data shows the noise of the PPG signal to be dominated by the photodiode sensor photon shot noise.

• 出版日期2015-8