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Title: Method and apparatus for combinatorial logic signal processor in a digitally based high speed x-ray spectrometer

Abstract

A high speed, digitally based, signal processing system which accepts a digitized input signal and detects the presence of step-like pulses in the this data stream, extracts filtered estimates of their amplitudes, inspects for pulse pileup, and records input pulse rates and system livetime. The system has two parallel processing channels: a slow channel, which filters the data stream with a long time constant trapezoidal filter for good energy resolution; and a fast channel which filters the data stream with a short time constant trapezoidal filter, detects pulses, inspects for pileups, and captures peak values from the slow channel for good events. The presence of a simple digital interface allows the system to be easily integrated with a digital processor to produce accurate spectra at high count rates and allow all spectrometer functions to be fully automated. Because the method is digitally based, it allows pulses to be binned based on time related values, as well as on their amplitudes, if desired.

Inventors:
 [1];  [2]
  1. (1300 Mills St., Menlo Park, CA 94025)
  2. (Carl) (Fremont, CA)
Issue Date:
Research Org.:
X-RAY INSTRUMENTATION ASSOC
OSTI Identifier:
872159
Patent Number(s):
5873054
Assignee:
Warburton, William K. (Menlo Park, CA) OAK
DOE Contract Number:  
FG03-92ER81311
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; combinatorial; logic; signal; processor; digitally; based; speed; x-ray; spectrometer; processing; accepts; digitized; input; detects; presence; step-like; pulses; data; stream; extracts; filtered; estimates; amplitudes; inspects; pulse; pileup; records; rates; livetime; parallel; channels; slow; channel; filters; time; constant; trapezoidal; filter; energy; resolution; fast; pileups; captures; peak; values; events; simple; digital; interface; allows; easily; integrated; produce; accurate; spectra; count; allow; functions; automated; binned; related; desired; x-ray spectrometer; energy resolution; digitally based; signal processor; signal processing; input signal; input pulse; data stream; peak value; count rate; time constant; pulse rate; parallel processing; count rates; speed x-ray; signal process; pulse pileup; combinatorial logic; fast channel; easily integrated; parallel process; processing channels; digital process; /702/250/378/

Citation Formats

Warburton, William K., and Zhou, Zhiquing. Method and apparatus for combinatorial logic signal processor in a digitally based high speed x-ray spectrometer. United States: N. p., 1999. Web.
Warburton, William K., & Zhou, Zhiquing. Method and apparatus for combinatorial logic signal processor in a digitally based high speed x-ray spectrometer. United States.
Warburton, William K., and Zhou, Zhiquing. Fri . "Method and apparatus for combinatorial logic signal processor in a digitally based high speed x-ray spectrometer". United States. https://www.osti.gov/servlets/purl/872159.
@article{osti_872159,
title = {Method and apparatus for combinatorial logic signal processor in a digitally based high speed x-ray spectrometer},
author = {Warburton, William K. and Zhou, Zhiquing},
abstractNote = {A high speed, digitally based, signal processing system which accepts a digitized input signal and detects the presence of step-like pulses in the this data stream, extracts filtered estimates of their amplitudes, inspects for pulse pileup, and records input pulse rates and system livetime. The system has two parallel processing channels: a slow channel, which filters the data stream with a long time constant trapezoidal filter for good energy resolution; and a fast channel which filters the data stream with a short time constant trapezoidal filter, detects pulses, inspects for pileups, and captures peak values from the slow channel for good events. The presence of a simple digital interface allows the system to be easily integrated with a digital processor to produce accurate spectra at high count rates and allow all spectrometer functions to be fully automated. Because the method is digitally based, it allows pulses to be binned based on time related values, as well as on their amplitudes, if desired.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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