TY - JOUR
T1 - TOFPET2
T2 - A high-performance ASIC for time and amplitude measurements of SiPM signals in time-of-flight applications
AU - Di Francesco, A.
AU - Bugalho, R.
AU - Oliveira, Luis
AU - Pacher, L.
AU - Rivetti, A.
AU - Rolo, M.
AU - Silva, J. C.
AU - Silva, R.
AU - Varela, J.
PY - 2016/3/18
Y1 - 2016/3/18
N2 - We present a readout and digitization ASIC featuring low-noise and low-power for time-of flight (TOF) applications using SiPMs. 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 conveyor based on a regulated common-gate topology. Each channel has quad-buffered analogue interpolation TDCs (time binning 20 ps) and charge integration ADCs with linear response at full scale (1500 pC). The signal amplitude can also be derived from the measurement of time-over-threshold (ToT). Simulation results show that for a single photo-electron signal with charge 200 (550) fC generated by a SiPM with 320 pF capacitance the circuit has 24 (30) dB SNR, 75(39) ps r.m.s. resolution, and 4(8) mW power consumption. The event rate is 600 kHz per channel, with up to 2 MHz dark counts rejection.
AB - We present a readout and digitization ASIC featuring low-noise and low-power for time-of flight (TOF) applications using SiPMs. 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 conveyor based on a regulated common-gate topology. Each channel has quad-buffered analogue interpolation TDCs (time binning 20 ps) and charge integration ADCs with linear response at full scale (1500 pC). The signal amplitude can also be derived from the measurement of time-over-threshold (ToT). Simulation results show that for a single photo-electron signal with charge 200 (550) fC generated by a SiPM with 320 pF capacitance the circuit has 24 (30) dB SNR, 75(39) ps r.m.s. resolution, and 4(8) mW power consumption. The event rate is 600 kHz per channel, with up to 2 MHz dark counts rejection.
KW - Analogue electronic circuits
KW - Data acquisition circuits
KW - Front-end electronics for detector readout
KW - Gamma camera, SPECT, PET PET/CT, coronary CT angiography (CTA)
UR - http://www.scopus.com/inward/record.url?scp=84961960565&partnerID=8YFLogxK
U2 - 10.1088/1748-0221/11/03/C03042
DO - 10.1088/1748-0221/11/03/C03042
M3 - Article
AN - SCOPUS:84961960565
SN - 1748-0221
VL - 11
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 3
M1 - C03042
ER -