Charge sensitive preamplifier and pulse shaper using CMOS process for germanium spectroscopy

Author

Kroeger, R.A. ; Johnson, W.N. ; Kurfess, J.D. ; Allen, M.D. ; Britton, Charles L. ; Clonts, L.C. ; Ericson, M. Nance ; Simpson, M.L.

Author_Institution

Naval Res. Lab., Washington, DC

Volume

42

Issue

4

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

921

Lastpage

924

Abstract

The authors have developed a low noise, low power charge sensitive amplifier and pulse shaping circuit. The application is for a double-sided germanium strip detector, nominally providing 50 independent spectroscopy channels. An array of these detectors would provide significant improvements in imaging, spectroscopy and sensitivity for space-based gamma-ray astronomy. The key features of these electronics are low noise, very low power, and a small footprint per channel. Performance of the first circuit is in good agreement with simulations, with ~205e noise rms (0 pF), and 3 mW/channel power consumption. The dynamic range is 0-3.3 MeV (germanium) with a linearity of ±0.6%. Performance of this prototype device is discussed

Keywords

CMOS analogue integrated circuits; astronomical instruments; detector circuits; gamma-ray astronomy; gamma-ray detection; nuclear electronics; operational amplifiers; preamplifiers; pulse shaping circuits; 0 to 3.3 MeV; CMOS; Ge; charge sensitive preamplifier; double-sided Ge strip detector; dynamic range; gamma-ray astronomy; linearity; low noise; noise; power consumption; pulse shaping circuit; CMOS process; Circuit noise; Detectors; Germanium; Low-noise amplifiers; Noise shaping; Preamplifiers; Pulse amplifiers; Pulse shaping methods; Spectroscopy;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.467881

Filename

467881