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Mostrando ítems 1-10 de 18
Artículo
Compensation of PVT Variations in ToF Imagers with In-Pixel TDC
(MDPI, 2017)
The design of a direct time-of-flight complementary metal-oxide-semiconductor (CMOS) image sensor (dToF-CIS) based on a single-photon avalanche-diode (SPAD) array with an in-pixel time-to-digital converter (TDC) must ...
Ponencia
Wide range 8ps incremental resolution time interval generator based on FPGA technology
(Institute of Electrical and Electronics Engineers, 2014)
Accurate generation of picosecond-resolution wide-range time intervals has become a necessity for the characterization of time-to-digital converters involved in time resolved imaging. This paper presents the design and ...
Artículo
A CMOS Digital SiPM With Focal-Plane Light-Spot Statistics for DOI Computation
(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 improve the quality of the positron emission tomography images affected by the parallax error. This ...
Ponencia
Low-Noise and High-Efficiency Near-IR SPADs in 110nm CIS Technology
(Institute of Electrical and Electronics Engineers, 2019)
Photon detection at longer wavelengths is much desired for LiDAR applications. Silicon photodiodes with deeper junctions and larger multiplication regions are in principle more sensitive to near-IR photons. This paper ...
Ponencia
In-pixel Voltage-Controlled Ring-Oscillator for Phase Interpolation in ToF Image Sensors
(2016)
The design and measurements of a CMOS pseudodifferential voltage-controlled ring-oscillator (VCRO) are presented. It is aimed to act as time interpolator for arrayable picosecond time-to-digital convertors (TDC). This ...
Ponencia
Design of a compact and low-power TDC for an array of SiPM's in 110nm CIS technology
(Institute of Electrical and Electronics Engineers, 2017)
Silicon photomultipliers (SiPMs) are meant to substitute photomultiplier tubes in high-energy physics detectors and nuclear medicine. This is because of their -to name a few interesting properties- compactness, lower bias ...
Artículo
Arrayable Voltage-Controlled Ring-Oscillator for Direct Time-of-Flight Image Sensors
(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 (TDC) at pixel level. A feasible approach to a compact implementation of the TDC is to use the multiple ...
Artículo
Real-Time Inter-Frame Histogram Builder for SPAD Image Sensors
(Institute of Electrical and Electronics Engineers, 2018)
CMOS image sensors based on single-photon avalanche-diodes (SPAD) are suitable for 2D and 3D vision. Limited by uncorrelated noise and/or low illumination conditions, image capturing becomes nearly impossible in a single-shot ...
Ponencia
An Experimentally-Validated Verilog-A SPAD Model Extracted from TCAD Simulation
(Institute of Electrical and Electronics Engineers, 2018)
Single-photon avalanche diodes (SPAD) are photodetectors with exceptional characteristics. This paper proposes a new approach to model them in Verilog-A HDL with the help of a powerful tool: TCAD simulation. Besides, to ...
Artículo
A CMOS Imager for Time-of-Flight and Photon Counting Based on Single Photon Avalanche Diodes and In-Pixel Time-to-Digital Converters
(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 (TDC) is presented. The architecture of the imager is thoroughly described with emphasis on the ...