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Voltage divider operation using high-Tc superconducting interface-engineered Josephson junctions

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5 Author(s)
Saitoh, K. ; Advanced Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji-shi, Tokyo 185-8601, Japan ; Soutome, Yoshihisa ; Fukazawa, Tokuumi ; Tarutani, Y.
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A rapid-single-flux-quantum toggle-flip-flop logic gate was fabricated using high-temperature superconducting interface-engineered Josephson junctions. It was shown that the gate can operate as a voltage divider up to 155 GHz at 15 K and 19 GHz at 27 K. At the same time, the temperature dependence of the IcRn product and the maximum divided voltage was compared. As a result, it was found that the ratio of these values is 0.4–0.1 for 15 K≫T≫27 K. Circuit simulation with noise sources reveals this peculiar temperature dependence of the maximum divided voltage. © 2000 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:76 ,  Issue: 18 )