NDLI: Smart-Optical Detector Array in CMOS for Absorbance Measurement of Physiological Fluids

Content Provider	IEEE Xplore Digital Library
Author	Fernandes, A.V. Pinheiro, C. Rocha, J.G. Minas, G.
Copyright Year	2007
Description	Author affiliation: Univ. of Minho, Guimaraes (Fernandes, A.V.; Pinheiro, C.; Rocha, J.G.; Minas, G.)
Abstract	This paper describes a smart-optical detector array for application in microchip size analytical laboratories for physiological fluids measurement by absorbance. For this purpose, an array of optical detectors with analog-to-digital conversion is designed and fabricated in a standard CMOS process. Its application is in the low-cost measurement of physiological fluids by optical absorption, e.g., a microplate cuvette array containing the physiological fluids in analysis is placed on top of the optical detector array that quantify the light absorbed by those fluids. The on-chip analog-to-digital conversion is performed using a one-bit first-order sigma-delta converter for each optical detector. The output signal of the device is a bit stream containing information about the absorbed light, which allows simple computer interfacing. This scheme of having simultaneous measurement of the light absorbed by the fluids avoids the errors that can be introduced due to the light fluctuations and performs on-chip calibration during each measurement allowing a non-calibrated light source.
Starting Page	1441
Ending Page	1446
File Size	2254136
Page Count	6
File Format	PDF
ISBN	9781424407545
DOI	10.1109/ISIE.2007.4374813
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-04
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Optical arrays Optical detectors Analog-digital conversion Laboratories Size measurement Optical design CMOS process Absorption Delta-sigma modulation
Content Type	Text
Resource Type	Article

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