NDLI: HX2: a 16-channel charge amplifier IC for the read-out of X-ray detectors

Content Provider	IEEE Xplore Digital Library
Author	Thomas, S.L. Seller, P. Sharp, P.H.
Copyright Year	1994
Description	Author affiliation: Rutherford Appleton Lab., Chilton, UK (Thomas, S.L.; Seller, P.; Sharp, P.H.)
Abstract	RAL Microelectronics Group has developed a 16-channel multiplexed charge amplifier IC (HX2) for the read-out of Cadmium Telluride X-ray detectors. The IC has been incorporated into a prototype X-ray imaging system intended for non-destructive production line monitoring. The HX2 contains an array of 16 integrating amplifiers, each with a 10 pF feedback capacitor, and a dynamic range of 20 pC. The integration period can be varied over the range /spl sim/5 /spl mu/s to /spl sim/100 ms. In order to extend its range of applications, HX2 was designed with two modes of operation. In the first mode, the integration period is followed by the read-out period where the 16 channels are multiplexed onto an analogue output bus. The next integration period starts when this read-out has finished. In the second mode, the read-out of the voltages from one integration period takes place during the subsequent integration period. This overlapping of integration and readout periods reduces the dead time of the HX2. The IC has a high signal-to-noise ratio (typically above 10000:1), and is suitable for the high-resolution read-out of other detector systems, such as photodiode arrays. The dual-mode operation allows it to work with detectors producing either continuous or pulsed currents.
Starting Page	774
Ending Page	777
File Size	280902
Page Count	4
File Format	PDF
ISBN	0780325443
DOI	10.1109/NSSMIC.1994.474496
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	X-ray imaging Microelectronics Cadmium compounds X-ray detectors Prototypes Production systems Monitoring Feedback Capacitors Dynamic range
Content Type	Text
Resource Type	Article

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