This paper presents the design and the characterization of a front-end circuit, designed in 28 nm CMOS, for real-time dosimetry in radiation diagnostics and radiation therapy. The front-end circuit is optimized for sensors made of hydrogenated amorphous silicon. The scheme is based on a current-to-frequency converter to sustain a large range of input currents. Three different programmable solutions have been investigated to be compatible with a wide variety of sensor sizes and applications. The front-end has been designed around three key specifications: an input capacitance between 1 pF and 50 pF, an input current from 100 pA to 2 mu A, and a measurement time ranging from 400 mu s to 60 ns. A first prototype has been fabricated and it is being characterized in laboratory.

A Front-End Circuit in 28 nm CMOS for Hydrogenated Amorphous Silicon Detectors in Clinical Dosimetry / Mazza, Giovanni; Piccolo, Lorenzo; Antognini, Luca; Aziz, Saba; Bashiri, Aishah; Calcagnile, Lucio; Calvo, Daniela; Caputo, Domenico; Caricato, Anna Paola; Catalano, Roberto; Cirio, Roberto; Cirrone, Giuseppe Antonio Pablo; Croci, Tommaso; Cuttone, Giacomo; De Cesare, Gianpiero; De Remigis, Paolo; Dunand, Sylvain; Fabi, Michele; Frontini, Luca; Grimani, Catia; Guarrera, Mariacristina; Ionica, Maria; Kanxheri, Keida; Large, Matthew; Lenta, Francesca; Liberali, Valentino; Lovecchio, Nicola; Martino, Maurizio; Maruccio, Giuseppe; Menichelli, Mauro; Monteduro, Anna Grazia; Morozzi, Arianna; Moscatelli, Francesco; Nascetti, Augusto; Pallotta, Stefania; Passeri, Daniele; Pedio, Maddalena; Petasecca, Marco; Petringa, Giada; Peverini, Francesca; Placidi, Pisana; Quarta, Gianluca; Rizzato, Silvia; Sabbatini, Federico; Servoli, Leonello; Stabile, Alberto; Talamonti, Cinzia; Thomet, Jonathan Emanuel; Tosti, Luca; Villani, Mattia; Wheadon, Richard James; Wyrsch, Nicolas; Zema, Nicola. - ELETTRONICO. - (2024), pp. 1-4. (Intervento presentato al convegno 13th International Conference on Modern Circuits and Systems Technologies (MOCAST) tenutosi a Sofia (Bulgaria) nel 26-28 June 2024) [10.1109/mocast61810.2024.10615398].

A Front-End Circuit in 28 nm CMOS for Hydrogenated Amorphous Silicon Detectors in Clinical Dosimetry

Lenta, Francesca;
2024

Abstract

This paper presents the design and the characterization of a front-end circuit, designed in 28 nm CMOS, for real-time dosimetry in radiation diagnostics and radiation therapy. The front-end circuit is optimized for sensors made of hydrogenated amorphous silicon. The scheme is based on a current-to-frequency converter to sustain a large range of input currents. Three different programmable solutions have been investigated to be compatible with a wide variety of sensor sizes and applications. The front-end has been designed around three key specifications: an input capacitance between 1 pF and 50 pF, an input current from 100 pA to 2 mu A, and a measurement time ranging from 400 mu s to 60 ns. A first prototype has been fabricated and it is being characterized in laboratory.
2024
979-8-3503-8542-7
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2993767