Progress in Superconductivity

The Korean Superconductivity Society (한국초전도학회)
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Operation of a Single Flux Quantum 4-stage Shift Register Fabricated with High $T_c$ Ramp-edge Junction Technology

고온 초전도 경사형 모서리 접합을 이용한 4단 쉬프트 레지스터의 동작

  • Kim, J. H. (Electronics and Telecommunication Research Institute) ;
  • Park, J. H. (Korea Institute of Science and Technology) ;
  • Kim, S. H. (Electronics and Telecommunication Research Institute) ;
  • Jung, K. R. (Korea Institute of Science and Technology) ;
  • Kang, J. H. (University of Inchon) ;
  • Sung, G. Y. (Electronics and Telecommunication Research Institute) ;
  • Hahn, T. S. (Korea Institute of Science and Technology)
  • 김준호 ;
  • 박종혁 ;
  • 김상협 ;
  • 정구락 ;
  • 강준희 ;
  • 성건용 ;
  • 한택상
  • Published : 2001.01.01
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Abstract

We have fabricated a single flux quantum 4-stage shift register with interface-controlled $Y_1$$Ba_2$$Cu_3$$O_{7-x}$(YBCO) Josephson junction. The YBCO Josephson junctions showed RSJ-like current-voltage(I-V) curves at temperatures 45~80K. We tested load and shift operation of shift register with binary data sequences “1000”, “1010”, “1011”, and “1111” at 58K. For all the binary data sequences, the shift register operated successfully. By operating the circuit with proper current pulses, we observed no errors during at least 12 hours operation for all the data sequences.s.

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