DocumentCode :
1820394
Title :
Low-noise CMOS preamplifier-shaper for silicon drift detectors
Author :
Gramegna, G. ; O´Connor, P. ; Rehak, P. ; Hart, S.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Volume :
1
fYear :
1996
fDate :
2-9 Nov 1996
Firstpage :
346
Abstract :
We have designed a 16-channel preamplifier-shaper for particle tracking using silicon drift detectors (SDD). The preamplifier, which is optimized for a detector capacitance of 0.2-0.8 pF, uses two new circuit techniques to achieve a low noise (ENC 120 e-+62 e-/pF), high linearity (<0.5% to 50 fC), and good tolerance to process variations and temperature and power supply fluctuations. The circuit is continuously sensitive, has no digital signals on chip, and requires no external components or critical adjustments. The peaking time of the shaper is 50 nsec and the power dissipation, including an off-chip driver, is 6.5 mW/channel. The circuit is fabricated in 1.2 μm CMOS and can accommodate detector leakage currents of up to 1.5 μA. Although the circuit was developed for use with particle tracking detectors, these techniques are also well-suited for the design of lower-noise preamplifiers for high-resolution X-ray spectroscopy systems
Keywords :
CMOS digital integrated circuits; X-ray detection; X-ray spectrometers; detector circuits; drift chambers; nuclear electronics; preamplifiers; pulse shaping circuits; silicon radiation detectors; 0.2 to 0.8 pF; 1.5 muA; 16-channel preamplifier-shaper; Si; Si drift detectors; circuit techniques; detector leakage currents; high-resolution X-ray spectroscopy; low-noise CMOS preamplifier-shaper; particle tracking; peaking time; power dissipation; power supply fluctuations; process variations; temperature fluctuations; Capacitance; Circuit noise; Detectors; Linearity; Noise shaping; Particle tracking; Power supplies; Preamplifiers; Silicon; Temperature sensors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium, 1996. Conference Record., 1996 IEEE
Conference_Location :
Anaheim, CA
ISSN :
1082-3654
Print_ISBN :
0-7803-3534-1
Type :
conf
DOI :
10.1109/NSSMIC.1996.590985
Filename :
590985
Link To Document :
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