ANALYSIS OF BIOMEDICAL PHYSICS IN PULSE OXIMETERS: PRINCIPLES OF PHOTOPLETHYSMOGRAPHY, PHOTOELECTRIC SENSORS, AND SIGNAL PROCESSING. PULSE J. Energy Inform. Biomed. [Internet]. 2026 Mar. 4 [cited 2026 Oct. 3];2(1):21-6. Available from: https://pulsejeib.edu.eu.org/jeibm/article/view/8