A Programmable Analogue Front-End ASIC for Gas Micro-Strip Detectors having a wide range of Input Capacitance

The FREDA ASIC is designed as a performance upgrade for the front-end electronics of the 'HOT' series gas micro strip detectors. These detectors have 512 channels each having different capacitance ranging from 2 pF-80 pF. FREDA is a 16 channel ASIC each of which consists of a preamplifier,...

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Bibliographic Details
Published in2006 IEEE Nuclear Science Symposium Conference Record Vol. 2; pp. 860 - 864
Main Authors Khalid, F.F., Jones, L.L., Stephenson, R., Lipp, J.D.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2006
Subjects
Application specific integrated circuits
Capacitance
CMOS process
Event detection
Leakage current
Preamplifiers
Radiation detectors
Voltage
X-ray detection
X-ray detectors
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Summary:The FREDA ASIC is designed as a performance upgrade for the front-end electronics of the 'HOT' series gas micro strip detectors. These detectors have 512 channels each having different capacitance ranging from 2 pF-80 pF. FREDA is a 16 channel ASIC each of which consists of a preamplifier, a programmable CR-RC shaper, a programmable gain amplifier and an output buffer. The charge preamplifier contains a leakage current compensation circuit to avoid voltage offset due to leakage current. The CR-RC shaper has 7 programmable peaking time settings from 50 ns-240 ns. The programmable gain amplifier has 4 gain settings of 1, 2, 4 and 8. This ASIC has been designed using a 0.35 mum CMOS process. The ASIC architecture and generation are described including simulated and measured results.
ISBN:9781424405602
1424405602
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2006.355985