Title :
Front-end ASIC for co-planar grid sensors
Author :
De Geronimo, Gianluigi ; Carini, Gabriella ; Murray, William S. ; O´Connor, Paul
Author_Institution :
Instrum. Div., Brookhaven Nat. Lab., Upton, NY
Abstract :
An application specific integrated circuit (ASIC) for co-planar grid (CPG) sensors is presented. The ASIC provides low-noise amplification of grids and cathode signals, difference between grid signals with adjustable relative gain, shaped signals with baseline stabilization, and timing signals. In the current version the peaking time of the shaped pulses is 5mus and the gain can be switched between 36mV/fC and 18mV/fC covering an energy range up to 3MeV. Designed in CMOS 0.25mum technology it dissipates 25mW from a single +2.5V supply. A description of the ASIC and the results of its characterization with CdZnTe CPG sensors are presented. The system is analyzed in terms of resolution, and the impact of the noise correlation due to the inter-grid capacitance is discussed
Keywords :
CMOS integrated circuits; application specific integrated circuits; gamma-ray detection; nuclear electronics; semiconductor counters; 5 mus; CMOS technology; CdZnTe CPG sensors; application specific integrated circuit; baseline stabilization; cathode signals; coplanar grid sensors; front-end ASIC; intergrid capacitance; low-noise amplification; noise correlation; timing signals; Application specific integrated circuits; CMOS technology; Cathodes; Laboratories; Low-noise amplifiers; Pulse amplifiers; Pulse shaping methods; Shape control; Signal processing; Timing;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1466850
