Passive Phase Shifter for Superconducting Josephson Circuits

Author

Balashov, D. ; Dimov, B. ; Khabipov, M. ; Ortlepp, T. ; Hagedorn, D. ; Zorin, A.B. ; Buchholz, F.-I. ; Uhlmann, F.H. ; Niemeyer, J.

Author_Institution

Physikalisch-Tech. Bundesanstalt, Braunschweig

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

142

Lastpage

145

Abstract

Quantized values of magnetic flux trapped in a superconducting loop enable a new type of passive phase shifting elements. These elements can be incorporated into digital Josephson circuits making their design compact. We have proven the functionality of such phase shifters fabricated in conventional Nb/Al trilayer technology. We report on the successful low speed operation of a rapid single flux quantum toggle flip-flop circuit with the integrated passive pi-phase shifting element.

Keywords

flip-flops; integrated circuit design; integrated logic circuits; logic design; magnetic flux; passive networks; phase shifters; superconducting logic circuits; digital circuit design; integrated passive pi-phase shifting element; magnetic flux; passive phase shifter; single flux quantum toggle flip-flop circuit; superconducting Josephson circuits; superconducting loop; trilayer technology; CMOS logic circuits; Critical current; Flip-flops; Josephson junctions; Magnetic flux; Niobium; Phase shifters; Superconducting device noise; Superconducting integrated circuits; Superconducting logic circuits; Flux quantum; Josephson phase shift; rapid single flux quantum electronics; superconducting integrated circuits;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.897382

Filename

4277282