A high performance fast-Fourier-transform spectrum analyzer for measuring spin noise spectrums  

作　　者：Yu Tong Lin Wang Wen-Zhe Zhang Ming-Dong Zhu Xi Qin Min Jiang Xing Rong Jiangfeng Du 仝煜;王淋;张闻哲;朱明东;秦熙;江敏;荣星;杜江峰(Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;CAS Key Laboratory of Microscale Magnetic Resonance,University of Science and Technology of China,Hefei 230026,China;Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [2]CAS Key Laboratory of Microscale Magnetic Resonance,University of Science and Technology of China,Hefei 230026,China [3]Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Physics B》2020年第9期259-266,共8页中国物理B（英文版）

基　　金：Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDC07020200);the National Key R&D Program of China(Grant Nos.2018YFA0306600 and 2016YFB0501603);the National Natural Science Foundation of China(Grant No.11927811);the Chinese Academy of Sciences(Grants Nos.GJJSTD20170001 and QYZDY-SSW-SLH004);Anhui Initiative in Quantum Information Technologies,China(Grant No.AHY050000);the Fundamental Research Funds for the Central Universities,China.

摘　　要：A high performance fast-Fourier-transform (FFT) spectrum analyzer, which is developed for measure spin noise spectrums, is presented in this paper. The analyzer is implemented with a field-programmable-gate-arrays (FPGA) chip for data and command management. An analog-to-digital-convertor chip is integrated for analog signal acquisition. In order to meet the various requirements of measuring different types of spin noise spectrums, multiple operating modes are designed and realized using the reprogrammable FPGA logic resources. The FFT function is fully managed by the programmable resource inside the FPGA chip. A 1 GSa/s sampling rate and a 100 percent data coverage ratio with non-dead-time are obtained. 30534 FFT spectrums can be acquired per second, and the spectrums can be on-board accumulated and averaged. Digital filters, multi-stage reconfigurable data reconstruction modules, and frequency down conversion modules are also implemented in the FPGA to provide flexible real-time data processing capacity, thus the noise floor and signals aliasing can be suppressed effectively. An efficiency comparison between the FPGA-based FFT spectrum analyzer and the software-based FFT is demonstrated, and the high performance FFT spectrum analyzer has a significant advantage in obtaining high resolution spin noise spectrums with enhanced efficiency.

关 键 词：fast Fourier transform spectrum analyzer field-programmable-gate-arrays(FPGA) spin noise spectrum 

分 类 号：TN791[电子电信—电路与系统] TM935.21[电气工程—电力电子与电力传动]