Design of an oximeter based on LED-LED configuration and FPGA technology

Radovan Stojanovic, Dejan Karadaglic

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    Abstract

    A fully digital photoplethysmographic (PPG) sensor and actuator has been developed. The sensing circuit uses one Light Emitting Diode (LED) for emitting light into human tissue and one LED for detecting the reflectance light from human tissue. A Field Programmable Gate Array (FPGA) is used to control the LEDs and determine the PPG and Blood Oxygen Saturation (SpO2). The configurations with two LEDs and four LEDs are developed for measuring PPG signal and Blood Oxygen Saturation (SpO2). N-LEDs configuration is proposed for multichannel SpO2 measurements. The approach resulted in better spectral sensitivity, increased and adjustable resolution, reduced noise, small size, low cost and low power consumption.
    Original languageEnglish
    Pages (from-to)574-586
    Number of pages13
    JournalSensors
    Volume13
    Issue number1
    DOIs
    Publication statusPublished - Jan 2013

    Keywords

    • photoplethysmography
    • light emitting diode
    • sensors
    • oxygen saturation
    • FPGA

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