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Method and apparatus for digitally based high speed x-ray spectrometer

United States Patent

5,684,850
November 4, 1997
View the Complete Patent at the US Patent & Trademark Office
A high speed, digitally based, signal processing system which accepts input data from a detector-preamplifier and produces a spectral analysis of the x-rays illuminating the detector. The system achieves high throughputs at low cost by dividing the required digital processing steps between a "hardwired" processor implemented in combinatorial digital logic, which detects the presence of the x-ray signals in the digitized data stream and extracts filtered estimates of their amplitudes, and a programmable digital signal processing computer, which refines the filtered amplitude estimates and bins them to produce the desired spectral analysis. One set of algorithms allow this hybrid system to match the resolution of analog systems while operating at much higher data rates. A second set of algorithms implemented in the processor allow the system to be self calibrating as well. The same processor also handles the interface to an external control computer.
Warburton; William K. (Menlo Park, CA), Hubbard; Bradley (Santa Cruz, CA)
Warburton; William K. (Menlo Park, CA)
08/ 695,063
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.