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IEICE TRANSACTIONS on Electronics

Open Access
Towards Ultra-High-Speed Cryogenic Single-Flux-Quantum Computing

Koki ISHIDA, Masamitsu TANAKA, Takatsugu ONO, Koji INOUE

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Summary :

CMOS microprocessors are limited in their capacity for clock speed improvement because of increasing computing power, i.e., they face a power-wall problem. Single-flux-quantum (SFQ) circuits offer a solution with their ultra-fast-speed and ultra-low-power natures. This paper introduces our contributions towards ultra-high-speed cryogenic SFQ computing. The first step is to design SFQ microprocessors. From qualitatively and quantitatively evaluating past-designed SFQ microprocessors, we have found that revisiting the architecture of SFQ microprocessors and on-chip caches is the first critical challenge. On the basis of cross-layer discussions and analysis, we came to the conclusion that a bit-parallel gate-level pipeline architecture is the best solution for SFQ designs. This paper summarizes our current research results targeting SFQ microprocessors and on-chip cache architectures.

Publication
IEICE TRANSACTIONS on Electronics Vol.E101-C No.5 pp.359-369
Publication Date
2018/05/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E101.C.359
Type of Manuscript
Special Section INVITED PAPER (Special Section on Innovative Superconducting Devices Based on New Physical Phenomena)
Category

Authors

Koki ISHIDA
  Kyushu University
Masamitsu TANAKA
  Nagoya University
Takatsugu ONO
  Kyushu University
Koji INOUE
  Kyushu University

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