基于可编程SNS型约瑟夫森结阵的驱动系统研究.doc

. . . . .第xx卷 第xx期 电测与仪表 Vol.xx No.xx 2018年 第xx期 Electrical Measurement Instrumentation xx.2018 学习参考 1 - . . . . .第xx卷 第xx期 电测与仪表 Vol.xx No.xx 2018年 第xx期 Electrical Measurement Instrumentation xx.2018 学习参考 基于可编程SNS型约瑟夫森结阵的驱动系统研究 刘志尧，贾正森，王磊，黄洪涛 （中国计量科学研究院 电磁计量科学技术研究所，北京 100013） 摘要:文章基于可编程SNS型约瑟夫森结阵，研究了一种交流量子电压驱动方法。该方法根据结阵的I-V特性，通过控制各段结阵的偏置状态及组合方式，实现交流量子电压的合成。采用电压源驱动方式，将节点电流分析法应用在偏置电路参数计算中，设计了偏置模块，搭建了交流约瑟夫森量子电压驱动系统。实验结果表明，该系统偏置电流的建立时间为1.27 μs，稳定性优于6 nA/min，输出电流分辨率可达0.01 mA，可以合成频率为50 Hz、每周期40个采样点、有效值为1 V的交流约瑟夫森量子电压信号。 关键词：约瑟夫森结阵；交流量子电压驱动方法；驱动系统；偏置电路 中图分类号：TH71 文献标识码：B 文章编号：1001-1390（2018）00-0000-00 Research of Driven driven System system for based on Programmable programmable SNS Josephson Junction junction Arrayarray Liu Zhiyao, Jia Zhengsen, Wang Lei, Huang Hongtao （(Division of Electricity and Magnetism, National Institute of Metrology, China, Division of Electricity and Magnetism, Beijing 100013, China）) Abstract: Based on the programmable SNS Josephson junction array, this paper studies a driven method of AC quantum voltage. According to the I-V characteristics of Junction array, this method realizes the synthesis of the AC quantum voltage by controlling the bias status and combination mode of each segment. Using the voltage driven method, and applying tThe node current analysis method is applied to calculate the bias circuit parameters through using the voltage driven method, as a result, the bias module is designed, and the AC Josephson quantum voltage driven system is built. The experimental results show that the settling time of bias current is 1.27 μs, the stab