3.5 GHz operation of a superconducting packet switch element

Hosoya, M.; Hioe, W.; Kominami, S.; Nagaishi, Hideyuki; Nishino, Tadashi

doi:10.1109/77.559340

Cited by 6 publications

(2 citation statements)

References 8 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most representative results of the logic application area are switching circuits using Josephson junction Hosoya et al reported on the design and test of a prototype superconducting packet switch [11,34]. Figure 1 shows a block diagram of the prototype.…”

Section: Logic Circuit Applicationsmentioning

confidence: 99%

Progress in Nb-based low-temperature superconductive electronics for high-speed digital applications in Japan

Nishino¹

1997

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Recent progress in Nb Josephson junction LSI technology in Japan is described. Improvements in fabrication processes of the Nb/AlOx/Nb junction have brought high junction-current densities and sub-micrometre junction sizes. Research efforts on logic LSIs have mainly focused on applications to high-speed switches for broad-band communication and high-performance parallel computing. The highest achieved clock frequency of the logic LSIs is beyond 3 GHz. Josephson memory technology has also progressed realizing an access time of 380 ps for a 4 kbit LSI. In a new approach toward logic circuits for future information systems, basic research on a hybrid circuit technology, composed of superconductive and semiconductor devices, has also been started in Japan. The present status of these research efforts in Japan is reviewed.

show abstract

Section: Logic Circuit Applicationsmentioning

confidence: 99%

Progress in Nb-based low-temperature superconductive electronics for high-speed digital applications in Japan

Nishino¹

1997

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Latch-type ac-powered gates, which are the concern of this paper, have been shown to operate at several gigahertz [3], [4]. However, full demonstrations of multi-gigahertz operaManuscript received Aug 20, 1996.…”

Section: Introductionmentioning

confidence: 99%

Multi-gigahertz operation of 3-junction-interferometer-based Josephson latching logic circuits

Hioe

Hosoya

Kominami

et al. 1997

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

Josephson latching logic gates require an ac power supply for correct operation. Owing to difficulty in fabricating Josephson regulators for large power currents, multi-phase sinusoidal power supply is the preferred method for multi-gigahertz operation. However, the inherently variable ac power reduces device margin for covering process variations. As a result, there exists a strong relationship between circuit size, maximum operating frequency and circuit throughput for a given available margin.The trade-offs between these performance criteria are analyzed for 3-junction-interferometerbased logic gates. Experimental evaluation of the multigigahertz operation of small circuits showed that careful design of power supply networks that reduce power supply fluctuations will be needed to maximize performance. Simulation and experimental results will be discussed.

show abstract