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Listar por autor "Vornicu, Ion"
Mostrando ítems 1-20 de 23
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Ponencia
A CMOS 0.18μm 64×64 single photon image sensor with in-pixel 11b time-to-digital converter
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2014)The design and characterization of a CMOS 64×64 single-photon avalanche-diode (SPAD) array with in-pixel 11b time-to-digital ...
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Ponencia
A CMOS 8×8 SPAD array for Time-of-Flight measurement and light-spot statistics
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2013)The design and simulation of a CMOS 8 × 8 single photon avalanche diode (SPAD) array is presented. The chip has been ...
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Artículo
A CMOS Digital SiPM With Focal-Plane Light-Spot Statistics for DOI Computation
Vornicu, Ion; Bandi, Franco; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2017)Silicon photomultipliers can be used to infer the depth-of-interaction (DOI) in scintillator crystals. DOI can help to ...
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Artículo
A CMOS Imager for Time-of-Flight and Photon Counting Based on Single Photon Avalanche Diodes and In-Pixel Time-to-Digital Converters
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Editura Academiei Române, 2014)The design of a CMOS image sensor based on single-photon avalanche-diode (SPAD) array with in-pixel time-to-digital converter ...
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Artículo
A Low-Resources TDC for Multi-Channel Direct ToF Readout Based on a 28-nm FPGA
Parsakordasiabi, Mojtaba; Vornicu, Ion; Rodríguez Vázquez, Ángel Benito; Carmona Galán, Ricardo (Multidisciplinary Digital Publishing Institute (MDPI), 2021)In this paper, we present a proposed field programmable gate array (FPGA)-based time-to-digital converter (TDC) architecture ...
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Artículo
A SPAD-based 3D imager with in-pixel TDC for 145ps-accuracy ToF measurement
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (SPIE, 2015)The design and measurements of a CMOS 64 × 64 Single-Photon Avalanche-Diode (SPAD) array with in-pixel Time-to-Digital ...
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Ponencia
An Experimentally-Validated Verilog-A SPAD Model Extracted from TCAD Simulation
López Martínez, Juan Manuel; Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2018)Single-photon avalanche diodes (SPAD) are photodetectors with exceptional characteristics. This paper proposes a new ...
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Artículo
Architecture-level optimization on digital silicon photomultipliers for medical imaging
Bandi, Franco; Ilisie, Victor; Vornicu, Ion; Carmona Galán, Ricardo; Benlloch, José M.; Rodríguez Vázquez, Ángel Benito (Multidisciplinary Digital Publishing Institute (MDPI), 2022)Silicon photomultipliers (SiPMs) are arrays of single-photon avalanche diodes (SPADs) connected in parallel. Analog silicon ...
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Artículo
Arrayable Voltage-Controlled Ring-Oscillator for Direct Time-of-Flight Image Sensors
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2017)Direct time-of-flight (d-ToF) estimation with high frame rate requires the incorporation of a time-to-digital converter ...
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Artículo
CMOS Vision Sensors: Embedding Computer Vision at Imaging Front-Ends
Rodríguez Vázquez, Ángel Benito; Fernández Berni, Jorge; Leñero Bardallo, Juan Antonio; Vornicu, Ion; Carmona Galán, Ricardo (IEEE, 2018)CMOS Image Sensors (CIS) are key for imaging technol-ogies. These chips are conceived for capturing opticalscenes ...
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Artículo
Compact CMOS active quenching/recharge circuit for SPAD arrays
Vornicu, Ion; Carmona Galán, Ricardo; Pérez Verdú, Belén; Rodríguez Vázquez, Ángel Benito (Wiley-Blackwell, 2016)Avalanche diodes operating in Geiger mode are able to detect single photon events. They can be employed to photon counting ...
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Artículo
Compact Real-Time Inter-Frame Histogram Builder for 15-Bits High-Speed ToF-Imagers Based on Single-Photon Detection
Vornicu, Ion; Darie, Ángela; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2019)Time-of-flight (ToF) image sensors based on single-photon detection, i.e., SPADs, require some filtering of pixel readings. ...
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Artículo
Compensation of PVT Variations in ToF Imagers with In-Pixel TDC
Rodríguez Vázquez, Ángel Benito; Vornicu, Ion; Carmona Galán, Ricardo (MDPI, 2017)The design of a direct time-of-flight complementary metal-oxide-semiconductor (CMOS) image sensor (dToF-CIS) based on a ...
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Ponencia
Design of a compact and low-power TDC for an array of SiPM's in 110nm CIS technology
Bandi, Franco; Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2017)Silicon photomultipliers (SiPMs) are meant to substitute photomultiplier tubes in high-energy physics detectors and nuclear ...
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Patente
Fotomultiplicador digital de combinación or de pulsos
Carmona Galán, Ricardo; Vornicu, Ion; Rodríguez Vázquez, Ángel Benito (Oficina Española de Patentes y Marcas , 2022-01-21)Fotomultiplicador digital de combinación OR de pulsos.El fotomultiplicador comprende un conjunto de macroceldas, cada una ...
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Ponencia
In-pixel Voltage-Controlled Ring-Oscillator for Phase Interpolation in ToF Image Sensors
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (2016)The design and measurements of a CMOS pseudodifferential voltage-controlled ring-oscillator (VCRO) are presented. It is ...
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Ponencia
Live demonstration: Photon counting and direct ToF camera prototype based on CMOS SPADs
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2017)This demonstrator reveals the performance and features of a single photon avalanche diode (SPAD) camera prototype. It is ...
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Ponencia
Low-Noise and High-Efficiency Near-IR SPADs in 110nm CIS Technology
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2019)Photon detection at longer wavelengths is much desired for LiDAR applications. Silicon photodiodes with deeper junctions ...
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Ponencia
On the calibration of a SPAD-based 3D imager with in-pixel TDC using a time-gated technique
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2015)The optical characterization of a CMOS 64×64 single-photon avalanche-diode (SPAD) array with in-pixel 11b time-to-digital ...
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Ponencia
Photon Counting and Direct ToF Camera Prototype Based on CMOS SPADs
Vornicu, Ion; Carmona Galán, Ricardo; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 2017)This paper presents a camera prototype for 2D/3D image capture in low illumination conditions based on single-photon ...