DocumentCode :
990949
Title :
Quasi-static operation of Josephson Atto - Weber switches (JAWS) fabricated using the selective niobium anodization process (SNAP)
Author :
Josephs, R.M. ; Wang, T.C. ; Flannery, W.E. ; Stein, B.F. ; Jillie, D.W. ; Smith, L.N.
Author_Institution :
Sperry Univac, Blue Bell, PA
Volume :
18
Issue :
6
fYear :
1982
fDate :
11/1/1982 12:00:00 AM
Firstpage :
1577
Lastpage :
1579
Abstract :
Recent measurements of Nb-aSi-Nb Josephson tunnel junctions fabritated using SNAP have demonstrated that this technique is a possible alternative to the Pb alloy technology. In the present work, the results of quasi-static measurements are reported on the first logic gates made using SNAP. The basic gate consists of a JAWS with both junctions having the same critical current. Operating margins in terms of the bias, off-set, and input currents are presented for individual gates and for series strings of gates having fanouts of 1 and 2. Whereas the use of an offset current substantially increases the margin of an individual gate, the increase in margin for a string is considerably less. The data are described well by a simple model taking into account the leakage current in the actual gates, and demonstrate the potential utility of SNAP.
Keywords :
Josephson device logic circuits; Coupling circuits; Critical current; Energy consumption; Josephson junctions; Leakage current; Logic circuits; Logic gates; Niobium; Switches; Switching circuits;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1982.1062084
Filename :
1062084
Link To Document :
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