Abstract

Adiabatic quantum flux parametron (AQFP) is a very energy-efficient superconductor logic. In AQFP logic, dynamic energy dissipation can be drastically reduced due to adiabatic switching operations using ac excitation currents. In the present study, we evaluated circuit yields using a large-scale AQFP circuit composed of as many as 10,000 AQFP gates with approximately 20,000 Josephson junctions. We measured eleven chips from four wafers and obtained circuit yields of 48% for 1,000-gate circuits and 22% for 10,000-gate circuits, respectively. In all the circuits, which worked correctly, the margins of excitation currents were as wide as approximately ±20%.

Original languageEnglish
Title of host publication2015 15th International Superconductive Electronics Conference, ISEC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781467383486
DOIs
StatePublished - 2016 Jan 14
Event15th International Superconductive Electronics Conference, ISEC 2015 - Nagoya, Japan

Other

Other15th International Superconductive Electronics Conference, ISEC 2015
CountryJapan
CityNagoya
Period15/7/615/7/9

Fingerprint

Fluxes
Superconducting materials
Energy dissipation
Demonstrations

Keywords

  • Adiabatic operation
  • AQFP
  • Circuit yield
  • Flux biasing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Narama, T., Yamanashi, Y., Yoshikawa, N., Takeuchi, N., & Ortlepp, T. (2016). Demonstration of 10k gate-scale adiabatic-quantum-flux-parametron circuits. In 2015 15th International Superconductive Electronics Conference, ISEC 2015. [7383438] Institute of Electrical and Electronics Engineers Inc.. DOI: 10.1109/ISEC.2015.7383438

Demonstration of 10k gate-scale adiabatic-quantum-flux-parametron circuits. / Narama, Tatsuya; Yamanashi, Yuki; Yoshikawa, Nobuyuki; Takeuchi, Naoki; Ortlepp, Thomas.

2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 2016. 7383438.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Narama, T, Yamanashi, Y, Yoshikawa, N, Takeuchi, N & Ortlepp, T 2016, Demonstration of 10k gate-scale adiabatic-quantum-flux-parametron circuits. in 2015 15th International Superconductive Electronics Conference, ISEC 2015., 7383438, Institute of Electrical and Electronics Engineers Inc., 15th International Superconductive Electronics Conference, ISEC 2015, Nagoya, Japan, 6-9 July. DOI: 10.1109/ISEC.2015.7383438
Narama T, Yamanashi Y, Yoshikawa N, Takeuchi N, Ortlepp T. Demonstration of 10k gate-scale adiabatic-quantum-flux-parametron circuits. In 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc.2016. 7383438. Available from, DOI: 10.1109/ISEC.2015.7383438

Narama, Tatsuya; Yamanashi, Yuki; Yoshikawa, Nobuyuki; Takeuchi, Naoki; Ortlepp, Thomas / Demonstration of 10k gate-scale adiabatic-quantum-flux-parametron circuits.

2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 2016. 7383438.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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