US 2014/0175380 A1 · SUPERCONDUCTING SINGLE FLUX QUANTUM INTEGRATED CIRCUIT DEVICE

Abstract

The present invention relates to a superconducting single flux quantum integrated circuit device, and eliminates the return current from a bias current and the effect the bias current itself has on SFQ logic circuits in a chip. A bias power source line for supplying a DC bias current for the superconducting single flux quantum integrated circuit in a chip and a bias drawing power source line for drawing said DC bias current to the outside of the chip are provided, the end of the bias drawing power source line is connected to the ground plane of the chip via a thin-film resistor having a plurality of resistance values of 0.1 milliohm to I milliohm near the superconducting single flux quantum integrated circuit laid out in the chip, and the DC bias current is drawn from a connection point with the ground plane.

Claims18

Dependent claims

A superconducting single flux quantum integrated circuit device, comprising:

a bias power source line which supplies a DC bias current to a superconducting single flux quantum integrated circuit in a superconducting single flux quantum integrated circuit chip, from outside the superconducting single flux quantum integrated circuit chip;
and
a bias drawing power source line for drawing the DC bias current to the outside of the superconducting single flux quantum integrated circuit chip,
wherein an end of the bias drawing power source line is connected to a ground plane of the superconducting single flux quantum integrated circuit chip via a plurality of resistors formed from thin-film resistors having a resistance value of 0.1 mΩ to 1Ω, at the periphery of a superconducting single flux quantum integrated circuit which is laid out in the superconducting single flux quantum integrated circuit chip, and the DC bias current is drawn out from a contact point with the ground plane.

1 more element

A superconducting single flux quantum integrated circuit device, comprising:

a main superconducting ground plane of a superconducting single flux integrated circuit chip;
a local superconducting ground plane separated from the main superconducting ground plane;
a superconducting single flux integrated circuit formed on the local ground plane;
thin-film resistors connected between the main superconducting ground plane and the local superconducting ground plane, and having a total resistance value of 1 μΩ to 0.1Ω;
and
a bias power source line which supplies a DC bias to the superconducting single flux integrated circuit.

3 more elements

Dependencies are inferred from the claim text.

Superconducting single flux quantum integrated circuit device

Life of this patent

Superconducting single flux quantum integrated circuit device

Life of this patent

Abstract

Claims18