A 1-GHz-clock Josephson microcomputer system

Conference · Fri Mar 01 04:00:00 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--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

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