Logic delays of 5-μm current-switched Josephson gates

Logic delays of 5-μm current-switched Josephson gates

Logic delays of a current-switched latching gate called the Josephson atto-Weber switch and its use in a dc powered flip-flop module have been investigated. Experimental circuits with cascade chains of 31 gates were fabricated using 5-μm square lead alloy tunnel junctions. Delays were measured on bo...

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Veröffentlicht in:Appl. Phys. Lett.; (United States) 1982-04, Vol.40 (8), p.739-741
1. Verfasser: Pei, S. S.
Format: Artikel
Sprache:eng
Schlagworte:
420201 - Engineering- Cryogenic Equipment & Devices
ALLOYS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPARATIVE EVALUATIONS
CURRENTS
DATA
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EXPERIMENTAL DATA
FABRICATION
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD ALLOYS
LOGIC CIRCUITS
NUMERICAL DATA
SUPERCONDUCTING JUNCTIONS
SWITCHES
TUNNEL EFFECT
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Zusammenfassung:Logic delays of a current-switched latching gate called the Josephson atto-Weber switch and its use in a dc powered flip-flop module have been investigated. Experimental circuits with cascade chains of 31 gates were fabricated using 5-μm square lead alloy tunnel junctions. Delays were measured on both the latching and the unlatching chains. The experimental circuits demonstrate operation faster than those reported for other Josephson gate designs using the same linewidth. For the latching OR gate with fanout of 3, the shortest measured gate delay is 15 ps.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.93211