Title :
A generation of CMOS readout ASICs for CZT detectors
Author :
De Geronimo, G. ; O´Connor, Patrick ; Grosholz, J.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
As a result of a cooperation between Brookhaven National Laboratory and eV Products a generation of high performance readout ASICs was developed. The ASICs, realized in CMOS 0.5 μm technology, are available in several different versions, single or multi-channel and with unipolar or bipolar shaper, in view of their use in research, spectroscopy, medical, safeguard and industrial applications. Four innovative circuit solutions are implemented in the ASICs: (i) a high linearity compensated continuous reset system which self-adapts to a wide range of detector leakage currents with minimum noise contribution; (ii) a high order shaper realized by using the follow-the-leader feedback (FLF) approach; (iii) a class AB rail-to-rail output stage with high driving capability; (iv) a baseline holder (BLH) for the baseline stabilization. The basic structure of the ASICs, a description of the novel circuit solutions and the preliminary experimental results are reported
Keywords :
CMOS analogue integrated circuits; application specific integrated circuits; cadmium compounds; nuclear electronics; pulse shaping circuits; readout electronics; semiconductor counters; CMOS readout ASICs; CZT detectors; baseline holder; baseline stabilization; class AB rail-to-rail output stage; detector leakage currents; driving capability; follow-the-leader feedback; high linearity compensated continuous reset system; high order shaper; minimum noise contribution; CMOS technology; Circuit noise; Detectors; Feedback circuits; Laboratories; Leak detection; Leakage current; Linearity; Multi-stage noise shaping; Spectroscopy;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.842539
