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- Category: Circuits, Devices & Systems
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A Low-Power, Dual-Wavelength Photoplethysmogram (PPG) SoC With Static and Time-Varying Interferer Removal
PROJECT TITLE :
A Low-Power, Dual-Wavelength Photoplethysmogram (PPG) SoC With Static and Time-Varying Interferer Removal
ABSTRACT:
This paper presents an occasional-power, reflectance-mode photoplethysmogram (PPG) front end with up to 100 μA of static interferer current removal and eighty seven dB attenuation of your time-varying interferers. The chip nominally consumes 425 μW including signal chain circuits, red and IR LED drive power, clocks, digitization and i/O. Measured knowledge shows the noise of the PPG signal to be dominated by the photodiode sensor photon shot noise.
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