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Integrated high resolution digital color light sensor in 130 nm CMOS technology
Strle, Drago (Avtor), Nahtigal, Uroš (Avtor), Batistell, Graciele (Avtor), Zhang, Vincent Chi (Avtor), Ofner, Erwin (Avtor), Fant, Andrea (Avtor), Sturm, Johannes (Avtor)

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Izvleček
This article presents a color light detection system integrated in 130 nm CMOS technology. The sensors and corresponding electronics detect light in a CIE XYZ color luminosity space using on-chip integrated sensors without any additional process steps, high-resolution analog-to-digital converter, and dedicated DSP algorithm. The sensor consists of a set of laterally arranged integrated photodiodes that are partly covered by metal, where color separation between the photodiodes is achieved by lateral carrier diffusion together with wavelength-dependent absorption. A high resolution, hybrid, ∑∆ ADC converts each photo diode’s current into a 22-bit digital result, canceling the dark current of the photo diodes. The digital results are further processed by the DSP, which calculates normalized XYZ or RGB color and intensity parameters using linear transformations of the three photo diode responses by multiplication of the data with a transformation matrix, where the coefficients are extracted by training in combination with a pseudo-inverse operation and the least-mean square approximation. The sensor system detects the color light parameters with 22-bit accuracy, consumes less than 60 μA on average at 10 readings per second, and occupies approx. 0.8 mm$^2$ of silicon area (including three photodiodes and the analog part of the ADC). The DSP is currently implemented on FPGA.

Jezik:Angleški jezik
Ključne besede:color light detection, high-resolution photo current measurements, measurements of light in CIE XYZ color luminosity space, RGB color sensor, CMOS-integrated color light sensor system, color signal processing
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FE - Fakulteta za elektrotehniko
Leto izida:2015
Št. strani:Str. 17786-17807
Številčenje:Vol. 15, iss. 7
UDK:681.5:535-2
ISSN pri članku:1424-8220
DOI:10.3390/s150717786 Povezava se odpre v novem oknu
COBISS.SI-ID:11077972 Povezava se odpre v novem oknu
Število ogledov:51
Število prenosov:15
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Sensors
Skrajšan naslov:Sensors
Založnik:MDPI
ISSN:1424-8220
COBISS.SI-ID:10176278 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:Drugi - Drug financer ali več financerjev
Program financ.:FFG (FIT-IT)
Akronim:COSMOS

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:22.07.2015

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:zaznavanje barvne svetlobe, visokoločljivo merjenje foto toka, meritev spektra svetlobe v svetlobnem prostoru CIE XYZ, RGB barvni senzor svetlobe

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