DC-powered Josephson integrated circuit
AssigneeHitachi, Ltd.
InventorsYuji Hatano, Shinichiro Yano, Hiroyuki Mori, Hirozi Yamada, Mikio Hirano
Life of this patent
Estimating the term…
Abstract
A DC powered integrated circuit includes a plurality of magnetic flux coupling type Josephson elements. First and second Josephson elements are connected in series to form a first element series circuit of Josephson elements. Third and fourth Josephson elements are connected in series to form a second element series circuit of Josephson elements. The first and second element series circuits are connected in series to form a huffle circuit, with a load inductance, three resistors and a DC current source.
Claims9
A DC-powered Josephson integrated circuit comprising:
- a first magnetic flux coupling type Josephson element;
- a first load resistor of which one terminal is connected to one terminal of said first magnetic flux coupling type Josephson element at a first junction;
- a second magnetic flux coupling type Josephson element;
- a second load resistor of which one terminal is connected to one terminal of said second magnetic flux coupling type Josephson element at a second junction, the other terminals of said first and second magnetic flux coupling type Josephson elements being connected together at a third junction, the other terminals of said first and second resistors being connected together at a fourth junction;
- an inductance connected between said third junction and said fourth junction;
- a third resistor connected between said first and second junctions;
- a DC current source connected between said first and second junctions;
- and
- means for supplying control signals to a plurality of control input lines of each of said Josephson elements;
- said first and second Josephson elements, said first and second load resistors, said inductance, said third resistor, said DC current source and said control signal supplying means constituting a logic circuit, wherein said first and second magnetic flux coupling type Josephson elements are respectively first and second element series circuits each having a plurality of magnetic flux coupling type Josephson elements connected in series.
A DC-powered Josephson integrated circuit comprising:
- a first magnetic flux coupling type Josephson element;
- a first load resistor of which one terminal is connected to one terminal of said first magnetic flux coupling type Josephson element at a first junction;
- a second magnetic flux coupling type Josephson element;
- a second load resistor of which one terminal is connected to one terminal of said second magnetic flux coupling type Josephson element at a second junction, the other terminals of said first and second magnetic flux coupling type Josephson elements being connected together at a third junction, the other terminals of said first and second resistors being connected together at a fourth junction;
- an inductance connected between said third junction and said fourth junction;
- a third resistor connected between said first and second junctions;
- a DC current source connected between said first and second junctions;
- and
- means for supplying control signals to a plurality of control input lines of each of said Josephson elements;
- said first and second Josephson elements, said first and second load resistors, said inductance, said third resistor, said DC current source and said control signal supplying means constituting a logic circuit, wherein said first and second magnetic flux coupling type Josephson elements are respectively first and second element series-parallel circuits each having a plurality of magnetic flux coupling type Josephson elements including at least one Josephson interferometer element connected in series and in parallel.
Dependencies are inferred from the claim text.