title: A novel photodiode for reflectance pulse oximetry in low-power applications.
abstract: The amount of light collected is crucial for low-power applications of pulse oximetry. In this work a novel ring-shaped backside photodiode has been developed for a wearable reflectance pulse oximeter. The photodiode is proven to work with a dual LED with wavelengths of 660 nm and 940 nm. For the purpose of continuously monitoring vital signs of a human, a temperature sensor is integrated onto the chip containing the photodiode. This biomedical multisensor chip is made for integration into "the Electronic Patch", an autonomous monitoring system for humans.
authors.affiliation: Department of Micro and Nanotechnology, Technical University of Demark, 2800 Kgs. Lyngby, Denmark. rasmus.haahr@mic.dtu.dk
authors.forename: Rasmus G
authors.initials: RG
authors.lastname: Haahr
authors.forename: Sune
authors.initials: S
authors.lastname: Duun
authors.forename: Karen
authors.initials: K
authors.lastname: Birkelund
authors.forename: Palle
authors.initials: P
authors.lastname: Raahauge
authors.forename: Peter
authors.initials: P
authors.lastname: Petersen
authors.forename: Henrik
authors.initials: H
authors.lastname: Dam
authors.forename: Lars
authors.initials: L
authors.lastname: Nørgaard
authors.forename: Erik V
authors.initials: EV
authors.lastname: Thomsen
mesh_terms: D001331:Automation; D003198:Computer Simulation; D011211:Electric Power Supplies; D004581:Electronics; D004582:Electronics, Medical; D004867:Equipment Design; D006801:Humans; D007259:Infrared Rays; D008027:Light; D008838:Microcomputers; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D010092:Oximetry / Q000295:instrumentation* / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D012984:Software; D013696:Temperature