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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.<\/jats:p>","DOI":"10.3390\/s130100574","type":"journal-article","created":{"date-parts":[[2013,1,4]],"date-time":"2013-01-04T10:53:47Z","timestamp":1357296827000},"page":"574-586","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Design of an Oximeter Based on LED-LED Configuration and FPGA Technology"],"prefix":"10.3390","volume":"13","author":[{"given":"Radovan","family":"Stojanovic","sequence":"first","affiliation":[{"name":"Faculty of Electrical Engineering, University of Montenegro, Cetinjski put b.b. 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Chem."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"795","DOI":"10.1109\/10.930904","article-title":"Artifact-resistant power-efficient design of finger-ring plethysmographic sensors","volume":"48","author":"Rhee","year":"2001","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"547","DOI":"10.1063\/1.1149174","article-title":"Using a Light-Emitting Diode as a high-speed, wavelength selective detector","volume":"69","author":"Miyazaki","year":"1998","journal-title":"Rev. Sci. 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A wireless low-power pulse oximetry system for patient telemonitoring. Bucharest, Romania."},{"key":"ref_12","unstructured":"Oklobdzija, V.G. (2005, January 24\u201326). PC based heart rate monitor implemented in XILINX FPGA and analysing the heart rate. Marina del Rey, CA, USA."},{"key":"ref_13","unstructured":"Stojanovi\u0107, R., Lutovac, B., and Leki\u0107, N. (2010, January 7\u201310). Implementation of IIR-FIR filters in fixed point arithmetic and its application in processing of biomedical signals. Donji Milanovac, Serbia."},{"key":"ref_14","unstructured":"Altera Corporation Cyclone III Device Handbook. Available online: http:\/\/www.altera.com\/literature\/hb\/cyc3\/cyclone3_handbook.pdf (accessed on 10 November 2012)."},{"key":"ref_15","unstructured":"Nonin Sensors. Available online: http:\/\/www.nonin.com\/PulseOximetry\/Sensors\/ReusableSensors\/ (accessed on 10 November 2012)."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/1\/574\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:44:04Z","timestamp":1760219044000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/1\/574"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,1,4]]},"references-count":15,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2013,1]]}},"alternative-id":["s130100574"],"URL":"https:\/\/doi.org\/10.3390\/s130100574","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2013,1,4]]}}}