DocumentCode :
1517467
Title :
Design of a Multi-Channel Front-End Readout ASIC With Low Noise and Large Dynamic Input Range for APD-Based PET Imaging
Author :
Fang, X.C. ; Hu-Guo, Ch ; Ollivier-Henry, N. ; Brasse, D. ; Hu, Y.
Author_Institution :
Inst. Pluridisciplinaire Hubert Curien (IPHC), ULP, Strasbourg, France
Volume :
57
Issue :
3
fYear :
2010
fDate :
6/1/2010 12:00:00 AM
Firstpage :
1015
Lastpage :
1022
Abstract :
This paper represents the design of a low-noise, wide band multi-channel readout integrated circuit (IC) used as front end readout electronics of avalanche photo diodes (APD) dedicated to a small animal positron emission tomography (PET) system. The first ten-channel prototype chip (APD-Chip) of the analog parts has been designed and fabricated in a 0.35 μm CMOS process. Every channel of the APD_Chip includes a charge-sensitive preamplifier (CSA), a CR-(RC)2 shaper, and an analog buffer. In a channel, the CSA reads charge signals (10 bits dynamic range) from an APD array having 10 pF of capacitance per pixel. A linearized degenerated differential pair which ensures high linearity in all dynamical range is used as the high feedback resistor for preventing pile up of signals. The designed CSA has the capability of compensating automatically up to 200 nA leakage current from the detector. The CR-(RC)2 shaper filters and shapes the output signal of the CSA. An equivalent input noise charge obtained from test is 275 e -+ 10 e-/pF. In this paper the prototype is presented for both its theoretical analysis and its test results.
Keywords :
application specific integrated circuits; avalanche photodiodes; positron emission tomography; readout electronics; zoology; 0.35 μm CMOS process; APD-based PET imaging; ASIC design; avalanche photo diodes; large dynamic input range; linearized degenerated differential pair; multichannel front-end readout ASIC; small animal positron emission tomography; wide band multichannel readout integrated circuit; Animals; Application specific integrated circuits; Diodes; Dynamic range; Integrated circuit noise; Positron emission tomography; Prototypes; Readout electronics; Testing; Wideband; Automatic leakage compensation; avalanche photodiode (APD); charge sensitive amplifier (CSA); large feedback resistance; low-noise amplifier; positron emission tomography (PET); readout front-end;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2010.2047404
Filename :
5485078
Link To Document :
بازگشت