Title :
A CMOS readout chip for pixel detectors
Author :
Mariani, R. ; Terreni, P. ; Mazzoni, L. ; Bottigli, U. ; Romeo, N.
Author_Institution :
Pisa Univ., Italy
Abstract :
In this paper a CMOS readout chip is presented to be used with pixel detectors. The chip architecture consists of an array of mixed analog-digital channels; each channel is composed of a low-noise charge integrator, an analog discriminator with an external threshold, and a digital counter, all synchronised by a global distributed clock. A prototype chip has been realised to be coupled with GaAs pixel detectors for digital mammography applications. The chip has been tested, and the results show a good matching with the expected performances, proving the validity of the architecture
Keywords :
CMOS integrated circuits; counting circuits; diagnostic radiography; discriminators; integrating circuits; mixed analogue-digital integrated circuits; photodetectors; CMOS readout chip; analog discriminator; chip architecture; digital counter; digital mammography; global distributed clock; low-noise charge integrator; mixed analog-digital channels; pixel detectors; Analog-digital conversion; Clocks; Counting circuits; Detectors; Gallium arsenide; Mammography; Performance evaluation; Prototypes; Synchronization; Testing;
Conference_Titel :
Analog and Mixed IC Design, 1997. Proceedings., 1997 2nd IEEE-CAS Region 8 Workshop on
Conference_Location :
Baveno
Print_ISBN :
0-7803-4240-2
DOI :
10.1109/AMICD.1997.637189
