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A generation of CMOS readout ASICs for CZT detectors

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3 Author(s)
G. De Geronimo ; Instrum. Div., Brookhaven Nat. Lab., Upton, NY, USA ; P. O'Connor ; J. Grosholz

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 circuit solutions and the preliminary experimental results are reported

Published in:

IEEE Transactions on Nuclear Science  (Volume:47 ,  Issue: 6 )