Superconductive gigahertz power supply for Josephson multichip systems

Author

Inoue, T. ; Tahara, S. ; Nagasawa, S. ; Tsuge, H. ; Ishida, I.

Author_Institution

NEC Corp., Ibaraki, Japan

Volume

2

Issue

1

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

15

Lastpage

20

Abstract

To confirm a gigahertz frequency power supply in a multichip system, three-stage superconductive filter-type powering device (SFPD) chips and a resistive load chip for a 500 gate Josephson device were designed and fabricated. Low-loss capacitors required for this gigahertz operation were also developed. The authors tested the operation of the three-stage SFPDs in a multichip configuration with resistive load. A superconductive power supply with frequencies as high as 2.0 GHz was demonstrated in a multichip system for the first time. For a 2.0-GHz SFPD, normal operation was confirmed with a resonant frequency of 2.1 GHz, a resonant level of -31 dB, and a current gain of 22.4. The 0.1- Omega input impedance of the device system was successfully transformed to 49.9 Omega .<>

Keywords

impedance convertors; microwave integrated circuits; power supply circuits; superconducting integrated circuits; 2 GHz; 500 gate Josephson device; Josephson multichip systems; Nb-Nb/sub 2/O/sub 5/-Al-Nb; current gain; gigahertz frequency power supply; impedance transformation; low loss capacitors; resistive load; resistive load chip; resonant level; superconductive power supply; three-stage superconductive filter-type powering device; Band pass filters; Cutoff frequency; Electrodes; Impedance; Large scale integration; Power supplies; Superconducting devices; Superconducting filters; Superconductivity; Wiring;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.124923

Filename

124923