Title :
AMPLEX-SiCAL: a large dynamic range low-noise CMOS signal processor for silicon calorimeters
Author :
Beuville, E. ; Joudon, A. ; Pascual, J. ; Grabit, R. ; Jarron, P. ; Stefanini, G. ; Buytaert, S. ; Cerri, C. ; Giffiths, J.L.
Author_Institution :
CEA Saclay, France
Abstract :
An analog signal processor using commercial 3- mu m CMOS technology has been designed and produced for the silicon luminosity calorimeter SiCAL of the ALEPH experiment. This processor is a modified version of the AMPLEX integrated circuit designed for the inner silicon detector of the UA-2 experiment. The output voltage swing has been increased to more than 5.5 V as required for the large dynamic range of 1000 MIPs or 3.8 pC. A fast analog summation, based on a neural network principle called follower aggregation, computes the average input charges for triggering purposes. The chip contains 16 channels, with a charge amplifier, shaper, track-and-hold stage, multiplexer, fast analog sum, and calibration system. The power consumption of the overall chip is 100 mW. The equivalent noise charge is less than 0.13 MIP (0.5 fC RMS) for a 50-pF detector capacitance, and the peaking time is about 250 ns.<>
Keywords :
CMOS integrated circuits; analogue processing circuits; calorimeters; nuclear electronics; signal processing equipment; silicon; trigger circuits; 100 mW; 250 ns; 3- mu m CMOS technology; 50 pF; ALEPH experiment; AMPLEX integrated circuit; AMPLEX-SiCAL; Si; UA-2 experiment; analog signal processor; average input charges; calibration system; charge amplifier; detector capacitance; equivalent noise charge; fast analog sum; fast analog summation; follower aggregation; large dynamic range low-noise CMOS signal processor; luminosity calorimeter; multiplexer; neural network principle; output voltage swing; peaking time; power consumption; shaper; track-and-hold stage; triggering purposes; CMOS process; CMOS technology; Detectors; Dynamic range; Integrated circuit technology; Neural networks; Signal design; Signal processing; Silicon; Voltage;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259018
