Josephson device a.c. power supply circuit and circuit substrate for mounting same
AssigneeKYOCERA Corporation
InventorsTakanori Kubo, Shigeo Tanahashi
Life of this patent
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Abstract
An impedance-matching circuit assembly supplies a.c. power from an external a.c. source to Josephson devices. The assembly comprises resonant-line composed quarter-wave impedance conversion circuits, interconnected in a tree. The impedance-conversion circuits are assembled such that connected to the a.c. source is a circuit having a first-stage impedance, followed by two circuits having second-state impedances connected in parallel, to each of which are connected in parallel two circuits having third-stage impedances, each of which in turn is connected to supply input terminals of two of the Josephson devices.
Claims29
An alternating current power supply circuit for supplying alternating current from a source to a plurality of Josephson devices, comprising:
- a first impedance-conversion circuit connectable to said source and including a resonant line of length (2n-1)/4 of a wavelength of said alternating current power, where n is a positive integer;
- and
- m number of second impedance-conversion circuits which include a resonant line of length (2n-1)/4 of said alternating current wavelength, where m is a positive integer greater than 1, each of the second impedance-conversion circuits defining a common end and a remaining end,
- the common ends of each of said second impedance-conversion circuits being connected to said first impedance-conversion circuit in parallel, and
- the remaining ends of each of said second impedance-conversion circuits being connected to supply input terminals of said plurality of Josephson devices, and
- a circuit substrate in which the alternating current supply circuit is provided, and wherein the Josephson devices are mounted on the circuit substrate.
An alternately current supply device for supplying alternating current from a power source to eight Josephson devices, comprising:
- a first impedance-conversion circuit connectable to said power source and including resonant lines of length one-quarter a wavelength of said alternating current power;
- two second impedance-conversion circuits including resonant lines of length one-quarter the wavelength of said alternating current power, an end of each one said second impedance-conversion circuits being being connected to said first impedance-conversion circuit;
- and
- four third impedance-conversion circuits including resonant lines of length one-quarter the wave length of said alternating current power, wherein
- each said third impedance-conversion circuit has an end connected to each said second impedance-conversion circuit, such that two of said ends of said third impedance-conversion circuits are connected to each of said second impedance-conversion circuits in parallel;
- each of remaining ends thereof is connected to two of said Josephson devices, and
- a circuit substrate in which the alternating current supply device is provided, and wherein the Josephson devices are mounted on the circuit substrate.
An alternating current supply device for supplying alternating current from a power source to eight Josephson devices, comprising:
- a first impedance-conversion circuit connectable to said power source and including resonant lines of length one-quarter a wavelength of said alternating current power;
- two second impedance-conversion circuits including resonant lines of length one-quarter the wavelength of said alternating current power, an end of each one of said second impedance-conversion circuits being connected to said first impedance-conversion circuit;
- and
- four third impedance-conversion circuits including resonant lines of length one-quarter the wave length of said alternating current power, wherein
- each said third impedance-conversion circuit has an end connected to each said second impedance-conversion circuit, such that two of said ends of said third impedance-conversion circuits are connected to each of said second impedance-conversion circuits in parallel;
- and
- each of remaining ends thereof is connected to two of said Josephson devices, wherein said first impedance-conversion circuit has an impedance of 25 ohms;
- said second impedance-conversion circuit has an impedance of 12.5 ohms;
- and said third impedance-conversion circuit has an impedance of 6.25 ohms.
A device connectable to an alternating current power source, comprising:
- a plurality of Josephson devices;
- an alternating current supply circuit having a plurality of resonant-line composed impedance conversion circuits interconnected in a tree configuration between said power source and supply input terminals of said Josephson devices;
- and
- a circuit substrate in which the alternating current supply circuit is provided, and wherein the Josephson devices are mounted on the circuit substrate.
A circuit substrate as a Josephson device mount, comprising:
- an insulative substructure on which a Josephson device is mounted;
- and
- an alternating current supply circuit provided in said circuit substrate for supplying alternating current from a power source to said Josephson device, wherein
- said alternating current circuit includes a plurality of resonant-line composed impedance conversion circuits, interconnected in a tree configuration between said power source and supply input terminals of said Josephson device, wherein said insulative substructure includes an insulative support in which said alternating current power supply circuit is formed, and a dielectric laminate formed on said insulative support and having a portion onto which said Josephson device is mounted.
A circuit substrate as a Josephson device mount, for supplying power in dual alternating currents which are 180.degree. C. out of phase with each other, from a power source to said Josephson device, comprising:
- first and second alternating-current supply-circuit patterns stacked at a given spacing for supplying said power in dual alternating currents to said Josephson device;
- first and second circuit-grounding patterns which are interconnected, and which sandwich said first and second alternating-current supply-circuit patterns in their interspaced stacking direction;
- and
- an insulative substructure in which said supply-circuit and circuit-grounding patterns are formed, and onto which said Josephson device is mounted.
Dependencies are inferred from the claim text.