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Title: XPS: A multi-channel preamplifier shaper IC for X-ray spectroscopy

Abstract

An integrated circuit featuring 48 channels of charge-sensitive preamplifiers followed by variable-gain pulse shaping amplifiers is being developed as part of an x-ray spectrometer with a highly segmented detector to handle high fluxes in synchrotron experiments. Such detector systems can provide excellent energy resolution combined with one-dimensional spatial information. The IC combines many basic spectroscopy amplifier functions with a low-noise preamplifier section to produce a unique circuit capable of driving conventional ADC modules directly. An important feature of the design is the novel CR-RC{sup 2} pulse shaper. In this section, high-linearity transconductor circuits are required in order to provide a broad range of continuously variable peaking times while still maintaining the linearity and noise performance necessary for x-ray spectroscopy. Reported here are first measurements made on the performance of a 16-channel prototype integrated circuit. At present, the preamplifier-shaper circuit achieves an equivalent input noise of 26 electrons rms at 2 {micro}s peaking time with a 0.2 pF external capacitor, which is similar to the capacitance of a single detector element. The design was fabricated in standard 1.2 {micro}m CMOS technology.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab., Engineering Div., Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
666027
Report Number(s):
LBNL-39990-Rev.; CONF-971147-
ON: DE98056093; TRN: 99:000124
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: Institute of Electrical and Electronic Engineers (IEEE) nuclear science symposium and medical imaging conference, Albuquerque, NM (United States), 11-13 Nov 1997; Other Information: PBD: Nov 1997
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 40 CHEMISTRY; X-RAY SPECTROMETERS; INTEGRATED CIRCUITS; PREAMPLIFIERS; PULSE SHAPERS; ANALOG-TO-DIGITAL CONVERTERS; X-RAY FLUORESCENCE ANALYSIS

Citation Formats

Krieger, B, Kipnis, I, and Ludewigt, B A. XPS: A multi-channel preamplifier shaper IC for X-ray spectroscopy. United States: N. p., 1997. Web.
Krieger, B, Kipnis, I, & Ludewigt, B A. XPS: A multi-channel preamplifier shaper IC for X-ray spectroscopy. United States.
Krieger, B, Kipnis, I, and Ludewigt, B A. 1997. "XPS: A multi-channel preamplifier shaper IC for X-ray spectroscopy". United States. https://www.osti.gov/servlets/purl/666027.
@article{osti_666027,
title = {XPS: A multi-channel preamplifier shaper IC for X-ray spectroscopy},
author = {Krieger, B and Kipnis, I and Ludewigt, B A},
abstractNote = {An integrated circuit featuring 48 channels of charge-sensitive preamplifiers followed by variable-gain pulse shaping amplifiers is being developed as part of an x-ray spectrometer with a highly segmented detector to handle high fluxes in synchrotron experiments. Such detector systems can provide excellent energy resolution combined with one-dimensional spatial information. The IC combines many basic spectroscopy amplifier functions with a low-noise preamplifier section to produce a unique circuit capable of driving conventional ADC modules directly. An important feature of the design is the novel CR-RC{sup 2} pulse shaper. In this section, high-linearity transconductor circuits are required in order to provide a broad range of continuously variable peaking times while still maintaining the linearity and noise performance necessary for x-ray spectroscopy. Reported here are first measurements made on the performance of a 16-channel prototype integrated circuit. At present, the preamplifier-shaper circuit achieves an equivalent input noise of 26 electrons rms at 2 {micro}s peaking time with a 0.2 pF external capacitor, which is similar to the capacitance of a single detector element. The design was fabricated in standard 1.2 {micro}m CMOS technology.},
doi = {},
url = {https://www.osti.gov/biblio/666027}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {11}
}

Conference:
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