A fully digital approach in sensing and processing photoplethysmographic signal

Radovan Stojanovic, Bogdan Asanin, Dejan Karadaglic

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    A fully digital sensor-actuator has been developed for photoplethysmographic (PPG) measurements. Instead of classical sensor it uses standard light emitting diodes (LEDs) for both light emitting and detecting. Time-duration based conversion protocol is implemented by a field programmable gate array (FPGA) avoiding the need for analog amplifiers and precision analogue to digital converters (ADCs). The basic sensing configuration, presented here, consists of a pair of LEDs directly connected to two FPGA's I/O pins and is capable of detecting the PPG signal from a finger or a toe. The better spectral sensitivity, increased and adjustable resolution, reduced noise, lower cost and dimensions are confirmed advantages.
    Original languageEnglish
    Title of host publicationBiomedical Engineering and Informatics, 2009 (BMEI '09)
    Number of pages4
    ISBN (Electronic)9781424441327
    ISBN (Print)9781424441341
    Publication statusPublished - 2009


    • PPG
    • measurement
    • microcontroller
    • sensors
    • LEDs

    ASJC Scopus subject areas

    • Instrumentation
    • Atomic and Molecular Physics, and Optics
    • Biomedical Engineering


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