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US 5,151,617 AGranted
Superconducting logic circuit
AssigneesResearch Development Corporation of Japan, Ryotaro Kamikawai
InventorsEiichi Goto, Willy Hioe, Mutsumi Hosoya, Ryotaro Kamikawai
Life of this patent
Estimating the term…
Abstract
A superconducting logic circuit is configured by using two kinds of input-output type quantum flux parametrons (QFP), that is, a periodically excited input-output type QFP and an arbitrarily excited input-output type QFP. The periodically excited QFP is excited by periodically varying exciting magnetic flux to amplify a binary magnetic flux. The arbitrarily excited QFP is excited by magnetic flux output signals of upstream QFPs.
Claims4
A superconducting circuit comprising:
- at least a periodically excited quantum flux parametron which is excited by periodically varying magnetic flux and used to amplify binary magnetic flux;
- and at least an arbitrarily excited quantum flux parametron which is excited by the output magnetic flux of one or more periodically excited quantum flux parametrons and used for logic operation of binary magnetic flux signals, said periodically excited quantum flux parametron and said arbitrarily excited quantum flux parametron, each comprising;
- a first superconducting loop having a pair of circuits which respectively comprise a first Josephson junction and a first input inductor, and a second Josephson Junction, and a second input inductor;
- an exciting line connected to the first superconducting loop;
- an input line magnetically connected to said first and second input inductors;
- a second superconducting loop having a pair of circuits which respectively comprise a third Josephson junction and a third input inductor, and a fourth Josephson junction and a fourth input inductor;
- an exciting line connected to said second superconducting loop;
- a direct current exciting input line magnetically connected to the third and the fourth input inductors;
- and
- an output inductor connected to the first superconducting loop, wherein the exciting lines of the first and second superconducting loops are directly connected, and the output inductors of the periodically excited quantum flux parametron is magnetically connected to the exciting line of the arbitrarily excited quantum flux parametron.
7 more elements
A superconducting circuit comprising:
- a first superconducting loop having a pair of circuits respectively comprising:
- a first Josephson junction and a first input inductor, and a second Josephson junction and a second input inductor;
- an exciting line connected to said first superconducting loop;
- an output inductor connected to said first superconducting loop;
- an input line magnetically connected to said first and second inductors;
- a second superconducting loop having a pair of circuits which respectively comprises a third Josephson junction and a third input inductors, and a fourth Josephson junction and a fourth inductor;
- an exciting line connected to said second superconducting loop;
- and
- a direct current exciting input line magnetically connected to the third and the fourth input inductors, wherein the exciting lines of the first and second superconducting loops are directly connected.
6 more elements
Dependencies are inferred from the claim text.