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Effects of the design parameters on characteristics of the inductances and JJS in HTS RSFQ circuits

Jabbari, T ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/TASC.2018.2856850
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. We have investigated various geometrical design dependencies for rapid single-flux-quantum (RSFQ) circuits in high- Tc superconductors (HTS) technology, including the characteristics of the intermediate inductances. Structural- and temporal-dependent combinations of Cn - Rn (capacitance and normal resistance of the Josephson junctions, JJs) in the HTS technology are also investigated. Relatively favorable combinations of normal resistance and low capacitance of the JJs needed in the HTS technology for RSFQ circuits have been made possible by recent fabrication methods of high-quality YBCO films. Obtaining these devices is made achievable by using the grain boundary structures and high critical current density (JC) of the HTS JJs. Mutual interactions of the intermediate inductances with other parts of the whole circuit are examined and optimized for the best operation situation. Here in particular, the operation of the HTS Josephson-transmission-line (JTL) cells utilizing the grain boundary Josephson junctions, including various structural inductances, is studied based on the reported parameters of the developed devices and thoroughly analyzed by simulation results. © 2018 IEEE
  6. Keywords:
  7. High-Tc superconductors (HTS) ; Josephson junction (JJ) ; rapid single-flux quantum (RSFQ) ; Barium compounds ; Capacitance ; Copper oxides ; Grain boundaries ; High temperature superconductors ; Inductance ; Oxide superconductors ; Quantum optics ; Semiconductor metal boundaries ; Superconducting films ; Temperature ; Temperature measurement ; Timing circuits ; Waveguide junctions ; Yttrium barium copper oxides ; Geometrical designs ; Grain boundary structure ; High critical current densities ; High Tc superconductors ; Josephson ; Josephson transmission lines ; Josephson-junction ; Rapid single-flux quantum ; Josephson junction devices
  8. Source: IEEE Transactions on Applied Superconductivity ; Volume 28, Issue 7 , 2018 ; 10518223 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8412101