Electronic digital logic circuitry – Superconductor – Tunneling device
Reexamination Certificate
2005-07-12
2005-07-12
Cho, James H. (Department: 2819)
Electronic digital logic circuitry
Superconductor
Tunneling device
C326S004000, C327S367000
Reexamination Certificate
active
06917216
ABSTRACT:
A single flux quantum (SFQ) pulse is generated (502) by injecting a superconductor output signal as a first signal at a “start” input (108) coupled to a superconductor delay element (104). The SFQ pulse is reflected (504) back and forth between first and second superconductor reflectors (102, 106) coupled to opposite ends of the superconductor delay element, thereby generating a time-disperse plurality of SFQ pulses at an output (110) coupled to the superconductor delay element. Thereafter, a second signal is input at a “stop” input (112) coupled to one of the first and second superconductor reflectors, thereby interrupting (506) the reflecting of the SFQ pulse at the one of the first and second superconductor reflectors, thus ending the generating of the time-disperse plurality of SFQ pulses at the output.
REFERENCES:
patent: 4983971 (1991-01-01), Przybysz et al.
patent: 6483339 (2002-11-01), Durand et al.
patent: 6486756 (2002-11-01), Tarutani et al.
patent: 6580310 (2003-06-01), Herr
K.K. Likharev and V. K. Semenov, RSFQ Logic/Memory Family: A New Josephson-Junction Technology for Sub-Terahertz-Clock-Frequency Digital Systems,IEEE Transactions on Applied Superconductivity, vol. 1, No. 1, Mar. 1991, pp. 3-28.
Cho James H.
Northrop Grumman Corporation
Posz Law Group , PLC
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