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Título: | A Wide Linear Dynamic Range Image Sensor Based on Asynchronous Self-Reset and Tagging of Saturation Events |
Autor: | Leñero-Bardallo, J. A. CSIC ORCID; Carmona-Galán, R. CSIC ORCID ; Rodríguez-Vázquez, Ángel CSIC ORCID | Palabras clave: | HDR Octopus retina. Event Linear response High dynamic range AER Event Image sensor |
Fecha de publicación: | 2017 | Editor: | Institute of Electrical and Electronics Engineers | Citación: | IEEE Journal of Solid-State Circuits 52: 1605- 1617 (2017) | Resumen: | We report a high dynamic range (HDR) image sensor with a linear response that overcomes some of the limitations of sensors with pixels with self-reset operation. It operates similar to an active pixel sensor, but its pixels have a novel asynchronous event-based overflow detection mechanism. Whenever the pixel voltages at the integration capacitance reach a programmable threshold, the pixels self-reset and send out asynchronously an event indicating this. At the end of the integration period, the voltage at the integration capacitance is digitized and readout. Combining this information with the number of events fired by each pixel, it is possible to render linear HDR images. Event operation is transparent to the final user. There is no limitation for the number of self-resets of each pixel. The output data format is compatible with frame-based devices. The sensor was fabricated in the AMS 0.18- μm HV technology. A detailed system description and experimental results are provided in this paper. The sensor can render images with an intra-scene dynamic range of up to 130 dB with linear outputs. The pixels' pitch is 25 μm and the sensor power consumption is 58.6 mW. | URI: | http://hdl.handle.net/10261/159786 | DOI: | 10.1109/JSSC.2017.2679058 | Identificadores: | doi: 10.1109/JSSC.2017.2679058 issn: 0018-9200 |
Aparece en las colecciones: | (IMSE-CNM) Artículos |
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JSSC2016_Final.pdf | 5,19 MB | Adobe PDF | Visualizar/Abrir |
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