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Power-Supply Subsystems for Remote PPG Vital Sign Monitors

Feb. 4, 2022
This two-part series presents validated SMPS designs for remote-patient vital sign monitoring applications, including biosensors with excellent system signal-to-noise performance.

This article series is in the Power Management topic within our Series Library and the Power Supply Design topic within our TechXchange Library

A photoplethysmogram (PPG) device can be implemented to measure blood volume changes from which vital sign information such as blood oxygen levels and heart rates are derived. This two-part series presents validated SMPS designs for remote-patient vital sign monitoring applications.

Part 1 provides discrete power-supply circuit design solutions for best performance using the MAX86171 optical pulse oximeter and heart-rate sensor analog front end (AFE). Part 2 will examine an integrated solution for space-constrained applications.