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Design of an Oximeter Based on LED-LED Configuration and FPGA Technology
Faculty of Electrical Engineering, University of Montenegro, Cetinjski put b.b. Podgorica, 81000, Montenegro
School of Engineering and Built Environment, Glasgow Caledonian University, City Campus 70 Cowcaddens Rd., Glasgow G4 0BA, UK
* Author to whom correspondence should be addressed.
Received: 20 November 2012; in revised form: 14 December 2012 / Accepted: 28 December 2012 / Published: 4 January 2013
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.
Keywords: photoplethysmography; light emitting diode; sensor; oxygen saturation; FPGA
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MDPI and ACS Style
Stojanovic, R.; Karadaglic, D. Design of an Oximeter Based on LED-LED Configuration and FPGA Technology. Sensors 2013, 13, 574-586.
Stojanovic R, Karadaglic D. Design of an Oximeter Based on LED-LED Configuration and FPGA Technology. Sensors. 2013; 13(1):574-586.
Stojanovic, Radovan; Karadaglic, Dejan. 2013. "Design of an Oximeter Based on LED-LED Configuration and FPGA Technology." Sensors 13, no. 1: 574-586.