DocumentCode :
1177573
Title :
A 16-channel charge sensitive amplifier IC for a PIN photodiode array based PET detector module
Author :
Moses, W.W. ; Kipnis, I. ; Ho, M.H.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
Volume :
41
Issue :
4
fYear :
1994
fDate :
8/1/1994 12:00:00 AM
Firstpage :
1469
Lastpage :
1472
Abstract :
A 16-channel integrated circuit charge sensitive preamplifier has been developed for a PET detector module that uses an 8×8 array of PIN photodiodes to identify the crystal of interaction. The amplifier, which is made using 1.2 μm CMOS technology, produces an output of 100 mV per 1000 e- input, and its noise performance is optimized for 10 pF detector capacitance. The rise time, fall time, bias current through the first FET, and detector current compensation are each controlled by a dc current applied to the 2 mm square chip. The Johnson noise (e- fwhm at 1 μs peaking time) is 173+13C, where C is the input capacitance in pF, and the shot noise (e- fwhm) is 16.4√(IT), where I is the detector dark current in pA and T is the amplifier shaping time in μs. With this amplifier, the target noise of 300 e- fwhm can nearly be met with 300 μm depletion thickness photodiodes (3 pF, 200 pA per 3×3 mm element)
Keywords :
biomedical electronics; computerised tomography; p-i-n photodiodes; preamplifiers; radioisotope scanning and imaging; 1 mus; 16-channel charge sensitive amplifier IC; 3 pF; Johnson noise; PET detector module; PIN photodiode array; amplifier shaping time; bias current; detector current compensation; fall time; integrated circuit charge sensitive preamplifier; medical instrumentation; nuclear medicine; positron emission tomography; rise time; shot noise; CMOS technology; Capacitance; Detectors; FETs; Integrated circuit technology; Noise shaping; PIN photodiodes; Positron emission tomography; Preamplifiers; Sensor arrays;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/23.322933
Filename :
322933
Link To Document :
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