Speaker
Mr
Agostino Di Francesco
(LIP Laboratorio de Instrumentacao e Fisica Experimental de Particulas)
Description
We present a readout and digitization ASIC for radiation detectors using modern Silicon Photomultipliers [1]. The circuit is designed in standard CMOS 110 nm technology, has 64 independent channels and is optimized for time-of-flight measurement in Positron Emission Tomography (TOF-PET). The input amplifier is a low impedance current mirror based on a regulated common-gate topology. The chip has quad buffered analogue interpolation TDCs and charge integration ADCs, in each channel. The signal amplitude can also be derived from the measurement of time-over-threshold. The circuit has linear response in the range 0-1500 pC. Simulation results show that for an impulse charge of 200 (550) fC the circuit has 25 (30) dB SNR, 93 (39) ps r.m.s. time resolution, and 5 (8) mW power consumption. The maximum event rate is 600 kHz per channel, with up to 2 MHz dark counts rejection.
[1] T. Nagano, N. Hosokawa, A. Ishida, R. Tsuchiya, K. Sato, and K. Yamamoto, “Timing resolution dependence on MPPC geometry and performance,” in Proc. Conf. Rec. IEEE Nuclear Science Symp., Seoul, Korea, Oct./Nov. 2013, pp. 1–5, paper NPO1-89.
Primary authors
Mr
Agostino Di Francesco
(LIP Laboratorio de Instrumentacao e Fisica Experimental de Particulas)
Angelo Rivetti
(TO)
Prof.
Joao Varela
(LIP Lisbon)
Prof.
Luis Bica Oliveira
(Univerisidade Nova de Lisboa)
Manuel Dionisio Da Rocha Rolo
(TO)
Mr
Ricardo Bugalho
(LIP Laboratório de Instrumentação e Física Experimental de Partículas)
