US 12,438,524 B2
Thermal transition filter for a superconducting circuit system
Aaron Christopher Lee, Hyattsville, MD (US); Anthony Joseph Przybysz, Linthicum, MD (US); James R. Medford, Columbia, MD (US); and John X. Przybysz, Severna Park, MD (US)
Assigned to NORTHROP GRUMMAN SYSTEMS CORPORATION, Falls Church, VA (US)
Filed by NORTHROP GRUMMAN SYSTEMS CORPORATION, Falls Church, VA (US)
Filed on Aug. 3, 2023, as Appl. No. 18/365,039.
Prior Publication US 2025/0047264 A1, Feb. 6, 2025
Int. Cl. H03H 11/04 (2006.01); G06N 10/40 (2022.01)
CPC H03H 11/04 (2013.01) [G06N 10/40 (2022.01)] 18 Claims
OG exemplary drawing
 
1. A superconducting circuit system comprising:
at least one bias input configured to provide a bias current to a superconducting device via at least one superconducting device bias line coupled to the superconducting device during operation of the superconducting device; and
a thermal transition filter system comprising at least one superconducting filter bias line interconnecting the at least one superconducting device bias line and the at least one bias input, the at least one superconducting filter bias line having a lower superconducting critical temperature than the at least one superconducting device bias line, the thermal transition filter system providing a current path to divert noise current provided from the at least one bias input away from the superconducting device during a temperature transition from a first temperature to a second temperature, the first temperature being greater than a highest superconducting critical temperature associated with the superconducting circuit system and the second temperature being less than a lowest superconducting critical temperature for the superconducting circuit system.