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Design and Operation of RSFQ Cell Library Fabricated by Using a 10-kA/cm2 Nb Technology

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5 Author(s)
Maezawa, M. ; Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba ; Ochiai, M. ; Kimura, H. ; Hirayama, Fuminori
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A 10-kA/cm2 Nb/AlOchi/Nb junction technology for rapid single flux quantum (RSFQ) integrated circuits has been developed. Modifying our standard 1.6-kA/cm2 cell library, we have implemented elementary cells used to build RSFQ digital-to-analog converters for ac voltage standard applications. The 10-kA/cm2 library cells have been fabricated by utilizing existing process tools. Correct operations of the circuits have been confirmed at low speed. The maximum operating frequencies evaluated by an average-voltage measurement technique were consistent with the scaling rules of RSFQ circuits.

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Applied Superconductivity, IEEE Transactions on  (Volume:17 ,  Issue: 2 )