Design and investigation of gate-to-gate passive interconnections for SFQ logic circuits

Author

Hashimoto, Yoshihito ; Yorozu, Shinichi ; Kameda, Yoshio ; Fujimaki, Akira ; Terai, Hirotaka ; Yoshikawa, Nobuyuki

Author_Institution

Int. Supercond. Technol. Center, Supercond. Res. Lab., Ibaraki, Japan

Volume

15

Issue

3

fYear

2005

Firstpage

3814

Lastpage

3820

Abstract

We have developed a method of designing single-flux-quantum (SFQ) logic circuits with passive gate-to-gate interconnections. Based on our method, we designed a 2×2 switch in which all the interconnections are implemented with passive transmission lines (PTLs) while short Josephson transmission line (JTL) segments are used only to adjust the signal timings. Compared with an identical switch using JTL interconnections, the switch using PTL interconnections has 45% fewer wiring junctions and requires 48% less wiring power current. The switch operated at 40 GHz with a bias margin of ±9.5%.

Keywords

integrated circuit interconnections; passive networks; superconducting interconnections; superconducting logic circuits; superconducting transmission lines; JTL; PTL; SFQ logic circuit design; gate-to-gate passive interconnection design; integrated circuit; passive transmission lines; short Josephson transmission line; single-flux-quantum logic circuit; superconductor; wiring junction; Design methodology; Distributed parameter circuits; Driver circuits; Integrated circuit interconnections; Logic circuits; Power transmission lines; Superconducting transmission lines; Switches; Timing; Wiring; Integrated circuit; interconnection; passive transmission line; single-flux-quantum (SFQ); superconductor;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.847487

Filename

1504851