Fabrication of interface elements for oxide RSFQ circuits

Author

Tarutani, Yoshinobu ; Ishimaru, Yoshihiro ; Wakana, Hironori ; Horibe, Masahiro ; Sugiyama, Hideyuki ; Adachi, Seiji ; Oshikubo, Yasuo ; Horibe, Osami ; Suzuki, Toshiaki ; Tanabe, Keiichi ; Kawabe, Ushio

Author_Institution

Supercond. Res. Lab., Tokyo, Japan

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

413

Lastpage

416

Abstract

RSFQ circuit elements were fabricated based on the YBa₂Cu₃O_7-x ramp-edge junctions and their characteristics were investigated. In particular, two types of interface circuits were designed, fabricated and their amplification functions were evaluated. The interface circuits comprised series array of SQUID´s that shared a common inductor each other. Each SQUID was switched between zero voltage state and voltage state by current injection. Input signal was AC Josephson current for the type-one interface circuit. The input signal was an SFQ for the type-two interface circuit. Both interface circuits could successfully be operated. In particular, an output voltage more than 1 mV was obtained for the type-one interface circuit that comprised the stack of five SQUID´s.

Keywords

SQUIDs; amplifiers; barium compounds; superconducting arrays; superconducting integrated circuits; yttrium compounds; 1 mV; AC Josephson current; RSFQ circuit element fabrication; SQUID series array; YBa₂Cu₃O_7-x; YBa₂Cu₃O_7-x ramp-edge junctions; amplification functions; common inductor; current injection; oxide RSFQ circuits; voltage amplifier; Electrodes; Fabrication; Frequency estimation; Josephson effect; SQUIDs; Substrates; Superconductivity; Thin film circuits; Wiring; Zero voltage switching;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813882

Filename

1211629