DocumentCode
26964
Title
Improved 
Toggle Flip-Flop Circuit With Increased Operating Speed and Temperature Range
Author
Galan, E. ; Cunnane, D. ; Ke Chen ; Xi, X.X.
Author_Institution
Dept. of Phys., Temple Univ., Philadelphia, PA, USA
Volume
25
Issue
3
fYear
2015
fDate
Jun-15
Firstpage
1
Lastpage
4
Abstract
We have fabricated and tested rapid single flux quantum toggle flip-flop circuits using self-shunted MgB2/ MgO/MgB2 Josephson junctions with a single ground layer. The MgB2 films were deposited using HPCVD, and the MgO barrier was deposited using DC reactive sputtering. We highlight the circuit´s voltage divider operation dependence on current bias and temperature which show operation from 7 to 30 K. The highest attained operating speed is 335 GHz at 7 K. These results demonstrate the versatile temperature range and speed of MgB2 digital circuits.
Keywords
CVD coatings; flip-flops; magnesium compounds; sputtering; superconducting logic circuits; voltage dividers; DC reactive sputtering; HPCVD deposition; Josephson junctions; MgB2-MgO-MgB2; current bias; digital circuits; quantum toggle flip-flop; rapid single flux toggle flip-flop circuit; single ground layer; temperature 7 K to 30 K; voltage divider operation; Inductance; Josephson junctions; Junctions; Temperature distribution; Temperature measurement; $hbox{MgB}_{2}$; High-speed digital circuit; Josephson Junctions; Josephson junctions; MgB2; RSFQ; Toggle Flip-Flop; high-speed digital circuit; toggle flip-flop;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2014.2366912
Filename
6945887
Link To Document