| 基于FPGA+DSP的核信号数字时间谱仪设计 |
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| 引用本文： | 孙剑,谢树欣,梁昊. 基于FPGA+DSP的核信号数字时间谱仪设计[J]. 核电子学与探测技术, 2012, 0(1): 41-45 |
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| 作者姓名： | 孙剑 谢树欣 梁昊 |
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| 作者单位： | 核探测与核电子学国家重点实验室物理电子学安徽省重点实验室中国科学技术大学近代物理系 |
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| 基金项目： | 国家自然科学基金资助项目(10975132) |
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| 摘 要： | 针对核电子学中核脉冲信号的高速实时数字化处理,设计了基于FPGA+DSP的两通道核信号数字时间谱仪。该实验平台基于数字恒比定时(dCFD)原理,采用高速运放和ADC进行模拟信号成型采样,数字信号送入FPGA完成波形判选、数据缓冲、FIR滤波和基线恢复,利用DSP实时信号重构和函数定时,通过USB2.0接口与上位机通信。该系统的主要特点是具有模数电路的高度集成、数字信号的实时运算,接近模拟定时的精度。
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| 关 键 词： | 数字恒比定时 高速ADC采样 FPGA控制 DSP实时信号处理 USB通信 |
Development of a Digital Time Spectrometer Based on FPGA+DSP for Nuclear Physics Experiment |
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| SUN Jian,XIE Shu-xin,LIANG Hao. Development of a Digital Time Spectrometer Based on FPGA+DSP for Nuclear Physics Experiment[J]. Nuclear Electronics & Detection Technology, 2012, 0(1): 41-45 |
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| Authors: | SUN Jian XIE Shu-xin LIANG Hao |
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| Affiliation: | (State Key Laboratory of Particle Detection & Electronics,Department of Modern Physics,University of Science and technology of China,Hefei 230026,China) |
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| Abstract: | The development of a Fast Digital Real-Time spectrometer for Timing of Nuclear Pulse Signals is discussed.The double-channel signal processing platform is based on FPGA+DSP with digital Constant Fraction Discriminate algorithm.Each channel features a 14-bit 125 MHz Samples/s ADC for signals sampling.FPGA controlls the whole system and implements on-chip Pulse trigger,Data buffer,FIR Filter,Baseline recovery.DSP implements on-line spectrum analysis and communication with computer by USB 2.0 interface.The main characteristics of the system is highly integrated circuit,digital real-time computing,precision close to analog circuit. |
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| Keywords: | High-speed ADC FPGA+DSP on-line analysis USB dCFD |
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