A generation of CMOS readout ASICs for CZT detectors

Author

De Geronimo, G. ; O´Connor, P. ; Grosholz, J.

Author_Institution

Instrum. Div., Brookhaven Nat. Lab., Upton, NY, USA

Volume

47

Issue

6

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1857

Lastpage

1867

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 circuit solutions and the preliminary experimental results are reported

Keywords

CMOS integrated circuits; application specific integrated circuits; nuclear electronics; readout electronics; semiconductor counters; semiconductor device noise; CMOS 0.5 μm technology; CMOS readout ASIC; CdZnTe; CdZnTe detectors; baseline holder; baseline stabilization; class AB rail-to-rail output stage; detector leakage currents; follow-the-leader feedback; high linearity compensated continuous reset system; high order shaper; high performance readout ASIC; minimum noise contribution; CMOS technology; Circuit noise; Detectors; Feedback circuits; Laboratories; Leak detection; Leakage current; Linearity; Multi-stage noise shaping; Spectroscopy;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.914460

Filename

914460