Author/Authors :
La Rosa، نويسنده , , A. and Mazza، نويسنده , , G. and Donetti، نويسنده , , M. and Marchetto، نويسنده , , F. and Luetto، نويسنده , , L. and Attili، نويسنده , , A. and Bourhaleb، نويسنده , , F. and Cirio، نويسنده , , R. and Garella، نويسنده , , M.A. and Giordanengo، نويسنده , , S. and Givehchi، نويسنده , , N. and Iliescu، نويسنده , , S. and Pardo، نويسنده , , J. and Pecka، نويسنده , , A. and Peroni، نويسنده , , C. and Pittà، نويسنده , , G.، نويسنده ,
Abstract :
A 64-channel charge measurement (Application-Specific Integrated Circuit) ASIC has been designed and tested: it is intended to serve as a front-end electronic read-out for detectors to monitor and measure radiotherapeutical beams. The ASIC has been designed in a CMOS 0.35 μm technology with particular attention to the linearity over a wide input range and can accept currents of both polarities. The linearity is better than 1.5% for a dynamic range of the input current between 500 pA and 3 μA. For a charge resolution of 350 fC, the spread (r.m.s.) of the gain is less than 1%.
Keywords :
current-to-frequency converter , dosimetry , Beam position monitor , Hadrontherapy , radiotherapy , VLSI electronics , CMOS technology
