PHOTOPLETHYSMOGRAPHY DEVICE WITH A COMPENSATION CURRENT SOURCE

A photoplesythmography (PPG) device includes an array of light emitting diodes (LED's) arranged to illuminate a tissue sample, and an array of photodetectors (PD's) adapted to detect light returned from the tissue sample and to output a PD output signal which depends at least in part on a...

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Bibliographische Detailangaben
1. Verfasser:	Bremer, Edward C
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DIAGNOSIS ELECTRICITY GENERATION HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE SURGERY
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Beschreibung
Zusammenfassung:	A photoplesythmography (PPG) device includes an array of light emitting diodes (LED's) arranged to illuminate a tissue sample, and an array of photodetectors (PD's) adapted to detect light returned from the tissue sample and to output a PD output signal which depends at least in part on a bias current. The PPG device also includes a compensation current source and a controller. The controller is adapted to operate the compensation current source so that the current source outputs the bias current to the photodetector array.