Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Instrumentierung
HK 34.7: Vortrag
Mittwoch, 19. März 2014, 18:30–18:45, HZ 8
A low-power front-end amplifier for the microstrip sensors of the PANDA Microvertex Detector — •Valentino Di Pietro1, Kai-Thomas Brinkmann1, Angelo Rivetti2, Alberto Riccardi1, Manuel Rolo2, and Sara Garbolino2 for the PANDA collaboration — 1II. Physikalisches Institut, JLU Gießen, Gießen, Germany — 2INFN Sezione di Torino, Torino, Italy
The most common readout systems designed for nuclear physics detectors are based on amplitude measurements. The information that needs to be preserved is the charge delivered by a particle hitting the sensor. The electronic chain employed in these cases is made of two main building blocks: front-end amplifier and ADC. An issue in the implementation of such an architecture in scaled CMOS technologies is the dynamic range, because the charge information is extrapolated through the sampling of the peak of the front-end output signal. It is therefore interesting to explore the use of time-based architectures that offer better performances. In fact, in these topologies the linearity between the charge and the signal duration can be maintained even if some building blocks in the chain saturate. The main drawback is the loss in resolution since a duration measurement involves the difference between two time measurements. This work will present the design of a front-end optimized for fast Time-over-Threshold applications. The circuit has been developed for the microstrip detectors of the PANDA experiment. The architecture of the front-end amplifier will be presented and simulations in a 110 nm CMOS technology will be discussed. Supported by BMBF, HGS-HIRe and JCHP.