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A low-noise CMOS front-end for TOF-PET

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Resumo:An analogue CMOS front-end for triggering and amplification of signals produced by a silicon photomultiplier (SiPM) coupled to a LYSO scintillator is proposed. The solution is intended for time-of-flight measurement in compact Positron Emission Tomography (TOF-PET) medical imaging equipments where excellent timing resolution is required (approximate to 100 ps). A CMOS 0.13 mu m technology was used to implement such front end, and the design includes preamplification, shaping, baseline holder and biasing circuitry, for a total silicon area of 500x90 mu m. Waveform sampling and time-over-threshold (ToT) techniques are under study and the front-end provides fast and shaped outputs for time and energy measurements. Post layout simulation results show that, for the trigger of a single photoelectron, the time jitter due to the pre-amplifier noise can be as low as 15 ps (FWHM), for a photodetector with a total capacitance of 70 pF. The very low input impedance of the pre-amplifier (approximate to 5 Omega) allows 1.8 ns of peaking time, at the cost of 10 mW of power consumption.
Autores principais:Rolo, M. D.
Outros Autores:Alves, L. N.; Martins, E. V.; Rivetti, A.; Santos, M. B.; Varela, J.
Assunto:Front-end electronics for detector readout Analogue electronic circuits PET PET/CT Solid state detectors
Ano:2011
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Aveiro
Idioma:inglês
Origem:RIA - Repositório Institucional da Universidade de Aveiro

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