Title :
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
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.847487
