Design of Digital Multichannel Analyzer Based on FPGA

Geoscience ›› 2012, Vol. 26 ›› Issue (6): 1317-1321.

• Appilance and Signal Processing • Previous Articles Next Articles

Design of Digital Multichannel Analyzer Based on FPGA

ZENG Wei hua ^-1，WEI Qiu ju^-²

1 School of Geophysics and Information Technology, China University of Geosciences，Beijing100083, China；
2 Hebei Vocational College of Geosciences, Shijiazhuang, Hebei050081,China

Received:2012-06-15 Revised:2012-08-26 Online:2012-10-24 Published:2012-10-31

Abstract

Abstract:

Digital multi-channel pulse height analysis becomes the mainstream of multi-channel analysis technology. A digital multi-channel analyzer (DMCA) based on a single FPGA chip is introduced. The nuclear signals are processed by EP3C40Q240. It uses digital signals acquired by ADC to do calculus, seek the peaks, discriminate the threshold, and then form the energy spectrum. DMCA communicates with the RS485 bus interface. The software on PC can control DMCA and display energy spectrum. And the energy spectrum of 137Cs is given, which is obtained from NaI( Tl) detector and processed by DMCA.

Key words: digital multi-channel analyzer, FPGA, digital calculus, RS485

CENG Wei-Hua, WEI Qiu-Ju. Design of Digital Multichannel Analyzer Based on FPGA[J]. Geoscience, 2012, 26(6): 1317-1321.

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Design of Digital Multichannel Analyzer Based on FPGA

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