Title :
A 13.2b optical proximity sensor system with 130klx ambient light rejection capable of heart rate and blood oximetry monitoring
Author :
Luca Sant;Andrea Fant;Snezana Stojanović;Simone Fabbro;Jose Luis Ceballos
Author_Institution :
Infineon Technologies Austria AG Villach, Austria
Abstract :
A system for measuring optical proximity based on reflection of modulated light is presented. Its novel input stage topology comprising an AC coupled TIA and a two stage DC rejection circuit based on a synthesized inductive impedance, provides readouts with a resolution better than 13.2 ENOB. This allows the sensor system to be used without modifications also for heart rate and blood oximetry monitoring.
Keywords :
"Photodiodes","Optical variables measurement","Accuracy","Photoconductivity","Light emitting diodes","Modulation","Optical reflection"
Conference_Titel :
European Solid-State Circuits Conference (ESSCIRC), ESSCIRC 2015 - 41st
Print_ISBN :
978-1-4673-7470-5
DOI :
10.1109/ESSCIRC.2015.7313905
