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Open AccessArticle

Quenching Circuit and SPAD Integrated in CMOS 65 nm with 7.8 ps FWHM Single Photon Timing Resolution

Interdisciplinary Institute for Technological Innovation and Department of Electrical and Computer Engineering, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
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Instruments 2018, 2(4), 19; https://doi.org/10.3390/instruments2040019
Received: 29 June 2018 / Revised: 24 August 2018 / Accepted: 20 September 2018 / Published: 22 September 2018
(This article belongs to the Special Issue Advances in Particle Detectors and Electronics for Fast Timing)
This paper presents a new quenching circuit (QC) and single photon avalanche diode (SPAD) implemented in TSMC CMOS 65 nm technology. The QC was optimized for single photon timing resolution (SPTR) with a view to an implementation in a 3D digital SiPM. The presented QC has a timing jitter of 4 ps full width at half maximum (FWHM) and the SPAD and QC has a 7.8 ps FWHM SPTR. The QC adjustable threshold allows timing resolution optimization as well as SPAD excess voltage and rise time characterization. The adjustable threshold, hold-off and recharge are essential to optimize the performances of each SPAD. This paper also provides a better understanding of the different contributions to the SPTR. A study of the contribution of the SPAD excess voltage variation combined to the QC time propagation delay variation is presented. The proposed SPAD and QC eliminates the SPAD excess voltage contribution to the SPTR for excess voltage higher than 1 V due to its fixed time propagation delay. View Full-Text
Keywords: single photon avalanche diode; quenching circuit; single photon timing resolution; SiPM; 3D digital silicon photomultiplier; 3D integrated detector; time-of-flight; positron emission tomography single photon avalanche diode; quenching circuit; single photon timing resolution; SiPM; 3D digital silicon photomultiplier; 3D integrated detector; time-of-flight; positron emission tomography
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Nolet, F.; Parent, S.; Roy, N.; Mercier, M.-O.; Charlebois, S.A.; Fontaine, R.; Pratte, J.-F. Quenching Circuit and SPAD Integrated in CMOS 65 nm with 7.8 ps FWHM Single Photon Timing Resolution. Instruments 2018, 2, 19.

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