Title :
Circuit implementation of mechanism for charge-sharing suppression for photon-counting pixel arrays
Author :
Abdalla, Suliman ; Nilsson, Hans-Erik ; Oelmann, Bengt
Author_Institution :
Dept. of Inf. Technol. & Media, Mid Sweden Univ., Sundsvall, Sweden
Abstract :
This work proposes an efficient circuit implementation of a mechanism for charge-sharing suppression in photon-counting pixel arrays based on current-mode circuits for the analog parts. The additional circuits needed for charge-sharing suppression in a four-pixel cluster, leads to an increase in power consumption of 36% and only a marginal increase in circuit area. The implemented pixel with window-discrimination, managing charge-sharing in a four-pixel cluster and with an event-counter of 13 bits, consists of 300 transistors and has a power consumption of 2.7 μW when idle. It is implemented in a 120nm CMOS process and the presented results are based on simulations.
Keywords :
CMOS image sensors; current-mode circuits; photon counting; 120 nm; 13 bit; 2.7 muW; CMOS process; charge-sharing suppression; current-mode circuits; four-pixel cluster; photon-counting pixel arrays; window discrimination; CMOS technology; Current mode circuits; Energy consumption; Image sensors; Optoelectronic and photonic sensors; Pixel; Pulse amplifiers; Spatial resolution; X-ray detection; X-ray detectors;
Conference_Titel :
NORCHIP Conference, 2005. 23rd
Print_ISBN :
1-4244-0064-3
DOI :
10.1109/NORCHP.2005.1597008