DocumentCode
903536
Title
Josephson 8-bit shift register
Author
Fujimaki, Norio ; Kotani, Seigo ; Imamura, Takeshi ; Hasuo, Shinya
Volume
22
Issue
5
fYear
1987
fDate
10/1/1987 12:00:00 AM
Firstpage
886
Lastpage
891
Abstract
A Josephson 8-bit shift register for use in Josephson computers and signal processors is described. The gates used in the circuit are modified variable threshold logic (MVTL) gates fabricated by 2.5-μm Nb/AlO/SUB x//Nb junction technology with Mo resistors and SiO/SUB 2/ insulation. They are driven by a three-phase power supply. The shift register has 112 gates and occupies a 1.1×2.1-mm/SUP 2/ area. Correct shift, load, hold, and clear operations were experimentally confirmed for all bits. The circuit operated at a clock frequency up to 2.3 GHz. Its power consumption was 1.8 mW. This power level is two or three orders of magnitude lower than for Si or GaAs shift registers.
Keywords
Josephson effect; Shift registers; Superconducting junction devices; Superconducting logic circuits; shift registers; superconducting junction devices; superconducting logic circuits; Clocks; Insulation; Josephson junctions; Logic circuits; Logic gates; Niobium; Power supplies; Resistors; Shift registers; Signal processing;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.1987.1052829
Filename
1052829
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