Abstract
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 language | English |
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Title of host publication | Biomedical Engineering and Informatics, 2009 (BMEI '09) |
Publisher | IEEE |
Pages | 1-4 |
Number of pages | 4 |
ISBN (Electronic) | 9781424441327 |
ISBN (Print) | 9781424441341 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- PPG
- measurement
- microcontroller
- sensors
- LEDs
ASJC Scopus subject areas
- Instrumentation
- Atomic and Molecular Physics, and Optics
- Biomedical Engineering