US 10,122,350 B2 · Josephson transmission line (JTL) system

Abstract

One embodiment describes a Josephson transmission line (JTL) system. The system includes a plurality of JTL stages that are arranged in series. The system also includes a clock transformer comprising a primary inductor configured to propagate an AC clock signal and a secondary inductor arranged in a series loop with at least two of the plurality of JTL stages. The clock transformer can be configured to propagate a single flux quantum (SFQ) pulse to set a respective one of the plurality of JTL stages in response to a first phase of the AC clock signal and to reset the respective one of the plurality of JTL stages in response to a second phase of the AC clock signal that is opposite the first phase.

Claims15

Dependent claims

A Josephson transmission line (JTL) system comprising:

a plurality of JTL stages that are arranged in series;
and
a clock transformer comprising a primary inductor configured to propagate an AC clock signal and a secondary inductor arranged in a series loop with at least two of the plurality of JTL stages, the clock transformer being configured to propagate a single flux quantum (SFQ) pulse to set a respective one of the plurality of JTL stages in response to a first phase of the AC clock signal and to reset the respective one of the plurality of JTL stages in response to a second phase of the AC clock signal that is opposite the first phase.

A method for propagating unipolar single flux quantum (SFQ) pulses in a Josephson transmission line (JTL) system, the method comprising:

providing a DC bias current through a primary inductor of a bias transformer to induce a bias signal via a secondary inductor;
providing an AC clock signal through a primary inductor of each of at least one clock transformer, each of the at least one clock transformer comprising a secondary inductor arranged in series with the secondary inductor associated with the bias transformer in a respective at least one series loop with at least two of a plurality of JTL stages of the JTL system;
and
providing unipolar SFQ pulses at an input of the JTL system, each of the unipolar SFQ pulses being propagated through the plurality of JTL stages based on the bias signal and the AC clock signal to set one of the JTL stages in the at least one series loop and to concurrently reset another one of the JTL stages in the at least one series loop in a sequence.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/943,767Filed 17 Nov 2015

Published

US 2017/0141769 A118 May 2017

Granted

6 Nov 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H03K 3/38
Generators characterised by the type of circuit or by the means used for producing pulses: by the use, as active elements, of superconductive devices
G06F 1/04
Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00: generating or distributing clock signals or signals derived directly therefrom
H03K 19/195
Using specified components: using superconductive devices
H03K 19/1952
Using superconductive devices: with electro-magnetic coupling of the control current

Josephson transmission line (JTL) system

Life of this patent

Josephson transmission line (JTL) system

Life of this patent

Abstract

Claims15