The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2025
Filed:
May. 10, 2023
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Aaron Christopher Lee, Hyattsville, MD (US);
Anthony Joseph Przybysz, Linthicum, MD (US);
Robert Miller, Hanover, ND (US);
NORTHROP GRUMMAN SYSTEMS CORPORATION, Falls Church, VA (US);
Abstract
A flux-pump digital-to-analog converter (DAC) includes a ring of Josephson transmission line (JTL) stages. The ring includes multiple injector Josephson junctions (JJs). Each of the multiple injector JJs can be individually activated to inject magnetic flux into the ring in a given AC clock cycle, or controllably deactivated so as not to inject flux during the given AC clock cycle. The flux-pump DAC further includes a load inductor coupled to ring JJs of the ring. The load inductor is configured to store the magnetic flux injected into the ring. Because the flux-pump DAC includes multiple injector JJs arranged around the JTL ring, it can ramp up current loaded into the load inductor faster than a single-injector flux-pump DAC, and with precise, variable controllability of ramp speed so as to provide enhanced adiabaticity.