WORKSHOP PAPER
Dark Signal Quantization and Random Telegraph Signal in a Quanta Image Sensor
Joanna Krynski1,2, Daniel McGrath2, Alexandre Le Roch1, Sarah Holloway2, Lucrezia Migliorin2, Vivian Bernard1, Valérian Laluca1, Alex Materne1, Cédric Virmontois1, Vincent Goiffon2
1CNES, 18 Av. Edouard Belin, 31400 Toulouse, France
2ISAE-SUPAERO, Université de Toulouse, 10 av. Marc Pélégrin, 31055 Toulouse, France

Abstract

Single-photon detection is a requirement for many scientific, defense and commercial applications. This study investigates the dark current characteristics of a Gigajot QIS16 camera. Dark signal histograms are used to accurately discriminate the sensor's offset, noise, and mean dark current at a single electron resolution. The study also explores the presence of noisy pixels and evidence of original dark current and MOSFET random telegraph signal behaviors. Correlated multiple sampling is observed to affect the dark signal outputs of the noisy pixels, resulting in discrete bands in temporal traces and multiple, evenly spaced peaks in their histograms.
Year: 2025
Workshop: IISW
URL: https://doi.org/10.60928/8t8m-8one
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Keywords

quanta image sensor, single-photon counting, dark current, random telegraph signal, correlated multiple sampling,

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