NDLI: A SiGe front-end prototype for the upgraded ATLAS liquid argon calorimeter

Content Provider	IEEE Xplore Digital Library
Author	Rescia, S.
Copyright Year	2009
Description	Author affiliation: Brookhaven National Laboratory, Upton, NY 11973-5000, USA (Rescia, S.)
Abstract	We have designed and fabricated a very low noise preamplifier and shaper to replace the existing ATLAS Liquid Argon readout for use at the Large Hadron Collider upgrade (SLHC). IBM's 8WL 130nm SiGe process was chosen for its radiation tolerance, low noise bipolar NPN devices, wide voltage range and potential use in other SLHC detector subsystems. Although the requirements for the final design have not been yet finalized, the prototype was designed to accommodate a 16 bit dynamic range. This was accomplished by using a single stage, low noise, wide dynamic range preamplifier followed by a dual range shaper. The low noise of the preamp is made possible by the low base spreading resistance of the silicon germanium NPN bipolar transistors. The relatively high voltage rating of the NPN transistors is exploited to allow a gain of 650V/A in the preamplifier which eases the input voltage noise requirement on the shaper. Each shaper stage is designed as a cascaded differential operational amplifier pair with a common mode operating point regulated by an internal feedback loop. Measurement of the fabricated circuits indicates their performance is consistent with the design specifications including the radiation tolerance targets.
Starting Page	1134
Ending Page	1137
File Size	1195939
Page Count	4
File Format	PDF
ISBN	9781424439614
ISSN	10957863
DOI	10.1109/NSSMIC.2009.5402408
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Silicon germanium Germanium silicon alloys Prototypes Argon Noise shaping Preamplifiers Voltage Dynamic range Large Hadron Collider Radiation detectors
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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