Title :
SFE16, a low noise front-end integrated circuit dedicated to the read-out of large Micromegas detectors
Author :
Delagnes, E. ; Abbon, P. ; Bedfer, Y. ; Faivre, J.C. ; Kunne, F. ; Magnon, A. ; Platchkov, S. ; Rebourgerad, P. ; Thers, D.
Author_Institution :
CEA/DSM/DAPNIA Saclay, Gif-sur-Yvette, France
fDate :
8/1/2000 12:00:00 AM
Abstract :
A front-end BiCMOS ASIC was specially developed for the Micromegas detectors to be used in the Small Angle Tracker of the COMPASS experiment at CERN. Each of the 16 channels of this integrated circuit contains a low noise preamplifier with a 100 ns peaking time filter and a discriminator driving a low-level differential digital buffer. The design of the preamplifier and the choice of the shaping have been tuned to the detector signal shape in order to allow the operation of Micromegas even for very low multiplication gain values. Noise measurements show an equivalent noise charge of less than 1500 e-rms for a detector capacitance of 40 pF. The measured performances of this ASIC associated or not with the detector are fully described in this paper
Keywords :
CMOS digital integrated circuits; application specific integrated circuits; discriminators; nuclear electronics; preamplifiers; 40 pF; COMPASS experiment; Micromegas detector; SFE16; Small Angle Tracker; discriminator; equivalent noise charge; front-end BiCMOS ASIC; low noise preamplifier; noise measurement; peaking time filter; preamplifier; Application specific integrated circuits; BiCMOS integrated circuits; Detectors; Digital filters; Digital integrated circuits; Integrated circuit noise; Multi-stage noise shaping; Preamplifiers; Signal design; Signal detection;
Journal_Title :
Nuclear Science, IEEE Transactions on
