US 12,206,413 B2 · SFQ-based pulse-conserving logic gates

Abstract

Josephson junction based logic devices and methods for their use are described. An example Josephson junction based logic device includes a two-input OR/AND (OA2) gate. The OA2 gate includes a first input node inductively coupled to a first input source and a second input node inductively coupled to a second input source. The first and second input sources are configured to provide single-flux-quantum (SFQ) pulses. The OA2 gate also includes first plurality of inductors coupled between the first input node and one of: a first output node or a second output node. The OA2 gate additionally includes a second plurality of inductors coupled between the second input node and one of: the first or the second output nodes. The OA2 gate also includes Josephson junctions coupled between a common node and one of: the first or the second input node, or the first or the second output node.

Claims14

Dependent claims

A Josephson junction based logic device comprising:

a two-input OR/AND (OA2) gate, wherein the OA2 gate consists of:
a first input node inductively coupled to a first input source;
a second input node inductively coupled to a second input source, wherein the first input source and the second input source are configured to provide single-flux-quantum (SFQ) pulses;
a first plurality of inductors coupled between the first input node and one of:
a first output node or a second output node;
a second plurality of inductors coupled between the second input node and one of:
the first output node or the second output node;
and
a plurality of Josephson junctions, wherein each Josephson junction is coupled between a common node and one of:
the first input node, the second input node, the first output node, or the second output node.

7 more elements

A method comprising:

providing a single-flux-quantum (SFQ) based input to a Josephson junction based logic device, wherein the Josephson junction based logic device comprises at least one of:
an OA2 gate, wherein the OA2 gate consists of:
a first OA2 input node inductively coupled to a first OA2 input source;
a second OA2 input node inductively coupled to a second OA2 input source;
a first plurality of OA2 inductors coupled between the first OA2 input node and one of:
a first OA2 output node or a second OA2 output node;
a second plurality of OA2 inductors coupled between the second OA2 input node and one of:
the first OA2 output node or the second OA2 output node;
and
a plurality of OA2 Josephson junctions, wherein each OA2 Josephson junction is coupled between a common node and one of:
the first OA2 input node, the second OA2 input node, the first OA2 output node, or the second OA2 output node;
and
in response to the input, providing at an output node a logical function based on the input, wherein the logical function comprises at least one of:
OR2, NOR2, AND2, NAND2, XOR2, and XNOR2.

11 more elements

Dependencies are inferred from the claim text.

SFQ-based pulse-conserving logic gates

Life of this patent

SFQ-based pulse-conserving logic gates

Life of this patent

Abstract

Claims14