dc.creator | Costas Santos, Jesús | es |
dc.creator | Serrano Gotarredona, María Teresa | es |
dc.creator | Serrano Gotarredona, Rafael | es |
dc.creator | Linares Barranco, Bernabé | es |
dc.date.accessioned | 2018-07-23T08:16:39Z | |
dc.date.available | 2018-07-23T08:16:39Z | |
dc.date.issued | 2007 | |
dc.identifier.citation | Costas Santos, J., Serrano Gotarredona, M.T., Serrano Gotarredona, R. y Linares Barranco, B. (2007). A spatial contrast retina with on-chip calibration for neuromorphic spike-based AER vision systems. IEEE Transactions on Circuits and Systems I: Regular Papers, 54 (7), 1444-1458. | |
dc.identifier.issn | 1549-8328 | es |
dc.identifier.uri | https://hdl.handle.net/11441/77500 | |
dc.description.abstract | We present a 32 32 pixels contrast retina microchip that provides its output as an address event representation (AER) stream. Spatial contrast is computed as the ratio between pixel photocurrent and a local average between neighboring pixels obtained with a diffuser network. This current-based computation produces an important amount of mismatch between neighboring pixels, because the currents can be as low as a few pico-amperes. Consequently, a compact calibration circuitry has been included to trimm each pixel. Measurements show a reduction in mismatch standard deviation from 57% to 6.6% (indoor light). The paper describes the design of the pixel with its spatial contrast computation and calibration sections. About one third of pixel area is used for a 5-bit calibration circuit. Area of pixel is 58 m 56 m, while its current consumption is about 20 nA at 1-kHz event rate. Extensive experimental results are provided for a prototype fabricated in a standard 0.35- m CMOS process. | es |
dc.description.sponsorship | Gobierno de España TIC2003-08164-C03-01, TEC2006-11730-C03-01 | es |
dc.description.sponsorship | European Union IST-2001-34124 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Institute of Electrical and Electronics Engineers | es |
dc.relation.ispartof | IEEE Transactions on Circuits and Systems I: Regular Papers, 54 (7), 1444-1458. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Address-event representation (AER) | es |
dc.subject | Analog circuits | es |
dc.subject | Artifical retina | es |
dc.subject | Calibration | es |
dc.title | A spatial contrast retina with on-chip calibration for neuromorphic spike-based AER vision systems | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/acceptedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Arquitectura y Tecnología de Computadores | es |
dc.relation.projectID | TIC2003-08164-C03-01 | es |
dc.relation.projectID | TEC2006-11730-C03-01 | es |
dc.relation.projectID | IST-2001-34124 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1109/TCSI.2007.900179 | es |
dc.identifier.doi | 10.1109/TCSI.2007.900179 | es |
idus.format.extent | 15 p. | es |
dc.journaltitle | IEEE Transactions on Circuits and Systems I: Regular Papers | es |
dc.publication.volumen | 54 | es |
dc.publication.issue | 7 | es |
dc.publication.initialPage | 1444 | es |
dc.publication.endPage | 1458 | es |
dc.contributor.funder | Gobierno de España | |
dc.contributor.funder | European Union (UE) | |