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

United States Patent

5,873,054
February 16, 1999
View the Complete Patent at the US Patent & Trademark Office
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.
Warburton; William K. (Menlo Park, CA), Zhou; Zhiquing (Carl), (Fremont, CA)
Warburton; William K. (Menlo Park, CA)
08/ 730,916
August 2, 1996
GOVERNMENT RIGHTS The U.S. Government has rights in this invention pursuant to Contract No. DE-FG03-92ER81311 awarded by the Department of Energy.