Field programmable gate arrays (FPGAs) are attractive for a digital spectrometer due to its advantages of digital signal processing. However, how to improve the versatility of the spectrometer and increase the operating frequency of the digital shaper has gradually become a limitation that needs to be resolved in the FPGA-based spectrometer. A solution to improve the universality of the FPGA-based digital spectroscopy system is presented in this work, and the implementation of the real-time digital signal processing unit is improved to obtain a higher operating frequency, and then the optimal parameters of the digital trapezoidal shaper and the processing unit are also discussed through a series of experiments; finally, a FPGA-based digital spectrometer is developed. With the HPGe detector, the spectrometer achieves excellent energy resolution performance of 0.35% at 662 keV, 0.25% at 1173.2 keV, and 0.23% at 1332.5 keV.

中文翻译：

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基于现场可编程门阵列的数字伽马能谱仪的实时信号处理

由于数字信号处理的优势，现场可编程门阵列 (FPGA) 对数字光谱仪很有吸引力。然而，如何提高光谱仪的通用性，提高数字整形器的工作频率，逐渐成为基于FPGA的光谱仪需要解决的局限。本文提出了一种提高基于FPGA的数字光谱系统通用性的解决方案，并改进了实时数字信号处理单元的实现，以获得更高的工作频率，进而得到数字梯形的最优参数还通过一系列实验讨论了整形器和处理单元；最后，开发了基于FPGA的数字光谱仪。使用 HPGe 探测器，