High-temperature superconducting shift registers operating at up to 100 GHz

Journal Article · Fri Dec 31 23:00:00 EST 1993 · IEEE Journal of Solid-State Circuits (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/4.272094· OSTI ID:7295807

Martens, J S; Pance, A; Char, K ^[1]

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1. Conductus, Inc., Sunnyvale, CA (United States); and others

Shift registers have been demonstrated in YBaCuO operating at 77 K using from 64 to over 1,000 junctions. These are some of the larger scale integrated circuits demonstrated to date using YBaCuO Josephson technology. The circuit is a modified rapid single flux quantum design in which a single trigger pulse causes a one bit shift of the entire word of 32--512 b in length. Two different junction technologies, electron-beam defined nanobridges and epitaxial edge junctions, have been used with parameter spreads ranging from 11% to 22%. Correct operation has been verified with low speed random word tests and circulating data tests while pseudo random bit sequence demonstrations are underway. A practical amount of time to shift between cells has been measured to be about 10 ps.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7295807
• Journal Information: IEEE Journal of Solid-State Circuits (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Journal of Solid-State Circuits (Institute of Electrical and Electronics Engineers); (United States) Vol. 29:1; ISSN IJSCBC; ISSN 0018-9200
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DESIGN
ELECTRONIC CIRCUITS
HIGH-TC SUPERCONDUCTORS
INTEGRATED CIRCUITS
JOSEPHSON JUNCTIONS
JUNCTIONS
MICROELECTRONIC CIRCUITS
OPERATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TECHNOLOGY ASSESSMENT
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES