1. Pulse Oximeters that Work on All Skin Tones, Open Oximetry, https://openoximetry.org/about/, accessed on 4th Jan. 2024.
2. Medical electrical equipment, Part 2-61: Particular requirements for basic safety and essential performance of pulse oximeter equipment, ISO 80601-2-61:2017.
3. Hu, S., Azorin-peris, V., “Opto-physiological sensor and method of assembly”, US10327652B2 granted in 2019.
4. In an LED drive circuit with constant-output-current control and constant-luminance control;Nishikawa,2006
5. A high current accuracy boost white LED driver based on offset calibration technique;Hsieh;IEEE Trans. Circuit. Systems II: Express Briefs,2011