Title :
An Electronc Circuit for Red/Infrared Oximeters
Author :
Schibli, Eugen G. ; Yee, Sinclair S. ; Krishnan, Vedavalli M.
Author_Institution :
Microtechnology Laboratory, Center for Bioengineering and Department of Electrical Engineering, University of Washington
Abstract :
An inexpensive electronic circuit is described for operation of a red/infrared oximeter that does not use fiberoptics. The circuit provides low-evel amplitude modulation of the LED currents. Narrow-band detectors separate the backscattered signal into the red and infrared components. An AGC loop performs the division (Ei/Er).
Keywords :
Animals; Biomedical electrodes; Brain stimulation; Chemicals; Circuits; Electrical stimulation; Instruments; Light emitting diodes; Steel; Testing; Humans; Infrared Rays; Light; Oximetry;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1978.326314
