A 1-GHz-clock Josephson microcomputer system

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5901210

Yano, S; Hatano, Y; Mori, H; Yamada, H; Wakahara, K; Hirano, M; Kawat, U ^[1]

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1. Hitachi Ltd., Kokubunji, Tokyo (Japan). Central Research Lab.

This paper describes a 1-GHz-clock Josephson microcomputer system developed to demonstrate the possibility of a high-speed superconducting computer system. It consists of a 4b data processor chip and a 1 Kb RAM chip. For the fabrication of these Josephson integrated circuits, a cross-shaped Nb/A10x/Nb Josephson junction process has been developed to realize small junction size and improve critical current uniformity, and has made fabrication of LSIs with several thousand gates possible. A latch-up-free DC flip-flop is an important element in the high-speed Josephson logic and memory circuits, having been newly applied to an all-Dc-powdered Josephson RAM with asynchronous access capability.

• OSTI ID: 5901210
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
JOSEPHSON JUNCTIONS
DESIGN
MICROPROCESSORS
INTEGRATED CIRCUITS
ALUMINIUM OXIDES
COMPUTER ARCHITECTURE
CRITICAL CURRENT
LAYERS
LOGIC CIRCUITS
MEMORY MANAGEMENT
NIOBIUM
SUPERCONDUCTIVITY
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COMPUTERS
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ELEMENTS
JUNCTIONS
METALS
MICROELECTRONIC CIRCUITS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENTS
665412* - Superconducting Devices- (1992-)
990200 - Mathematics & Computers