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|title: ||A low-noise CMOS front-end for TOF-PET|
|authors: ||Rolo, M. D.|
Alves, L. N.
Martins, E. V.
Santos, M. B.
|keywords: ||Front-end electronics for detector readout|
Analogue electronic circuits
Solid state detectors
|issue date: ||2011|
|publisher: ||Institute of Physics|
|abstract: ||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.|
|publisher version/DOI: ||http://dx.doi.org/10.1088/1748-0221/6/09/P09003|
|source: ||Journal of Instrumentation|
|appears in collections||DETI - Artigos|
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