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Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 613 (2010) 134-140
A Charge-Sensitive Amplifier Associated with APD or PMT for Positron Emission Tomography Scanners
H. Mathez1, P. Russo1, G.-N. Lu2, P. Pittet2, L. Quiquerez2, J. Lecoq3, G. Bohner3

We present a Charge-Sensitive Amplifier (CSA) to be coupled with a 511-KeV 2-photon detector for positron emission tomography scanners. The circuit has been designed to be associated with an Avalanche Photodiode (APD) or Photo-Multiplier Tube (PMT) with large capacitance. It is a two-stage structure. The input stage consists of a foldedcascode fully-differential part and a common-mode feedback (CMFB) circuit. The output stage employs complementary source followers. The amplifier has been designed in a 0.35μm BiCMOS process with optimization of noise and speed performances to meet specific constraints. Its main characteristics evaluated by post-layout simulations are: 70-dB DC gain, 4.6-GHz GBW, 20-ns peaking time for pulsed stimulus, 3900-electron equivalent input noise charge (ENC), 135-mW power consumption at 3.5 V supply.
1 :  IPNL - Institut de Physique Nucléaire de Lyon
2 :  INL - Institut des nanotechnologies de Lyon - Site d'Ecully
3 :  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
Sciences de l'ingénieur/Micro et nanotechnologies/Microélectronique

Physique/Physique/Instrumentations et Détecteurs
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