WORKSHOP PAPER
A 10 µm pitch, SXGA Multifunctional IRFPA ROIC with In-Pixel Laser Event Detection and High Dynamic Range Imaging
C.G. Jakobson1, I. Pivnik1, R. Dobromislin1, G. Zohar1, O. Cohen1, Y. Chaham1, N. Shiloah1, R. Talmor1, E. Ilan1, I. Nevo1, W. Freiman1, N. Ben Ari1, R. Fruhi1, T. Shapira1, R. Fraenkel1
1SCD Semiconductor Devices, P.O. Box 2250, Haifa, 31021, Israel

Abstract

Modern infrared focal plane arrays require in-pixel multimode capabilities. One purpose is to include variable gain that enables imaging in wide dynamic range scenarios. Another purpose is to include special in pixel functions that can provide event detection and analysis at the pixel level. This work presents a new readout integrated circuit that provides imaging together with laser pulse detection. The standard imaging modes at low and medium gain are based on direct injection, a low noise imaging mode with high gain based on charge transimpedance amplification is also implemented. A special laser feature analyzes in real-time the AC component of the signal integration to recognize the presence of a laser event and combines the image with asynchronous or synchronous laser detection. The image pixel size is 10x10 µm2 providing an image resolution of 1280x1024 that is combined with laser detection based on binning of four pixels with a resolution of 640x512. At low noise, imaging the full well capacity is 12ke-, and goes up to 0.5Me- and 1Me- for medium and low gain laser pulse imaging, respectively. The minimum detectability is 500e-.
Publisher: IISS (Int. Image Sensors Society)
Year: 2017
Workshop: IISW
URL: https://doi.org/10.60928/ppy4-yxcb
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Keywords

ROIC, Multifunctional, SWIR, Laser Pulse Detection, Infrared Detector, InGaAs, Low Light Level,

References

1) S. Elkind, E. Ilan, R. Dobromislin, "Detector pixel signal readout circuit using an AC signal component in implementing an event detection mode per pixel", US Patent US9215386 B2, 2015
2) L. Langof et al., "Advanced multi-function infrared detector with on-chip processing", Proc. of SPIE 8012, Infrared Tech. and Applicat. XXXVII, 80120F, 2011. https://doi.org/10.1117/12.883248
3) L. Shkedy et al., "Multifunction InGaAs detector with on-chip signal processing", Proc. of SPIE Vol. 8704 87042I-1, 2013. https://doi.org/10.1117/12.2015580
4) R. Fraenkel et al., "High definition 10μm pitch InGaAs detector with asynchronous laser pulse detection mode", Infrared Technology and Applications XLII, 981903, 2016. https://doi.org/10.1117/12.2222762
5) O. Nesher et al., "High resolution 1280x1024 15µm pitch compact InSb IR detector with on-chip ADC", Proc. SPIE IR Tech. & App. XXXV, vol. 7298, pp. 1-9, 2009. https://doi.org/10.1117/12.817054
6) M.F. Snoeij, A.J.P. Theuwissen, K.A.A.Makinwa, J.H. Huising, "Multiple-ramp column parallel ADC architectures for CMOS image Sensors", IEEE J. of Solid State Circuits, vol. 42, no. 12, pp. 2968-77, Dec. 2007, 2007. https://doi.org/10.1109/jssc.2007.908720
7) A. Rogalski, "Infrared detectors: an overview", Infrared Physics & Technology 43 pp. 187–210, 2002. https://doi.org/10.1016/s1350-4495(02)00140-8