US 12,015,383 B2
Superconducting signal amplifier
Faraz Najafi, Palo Alto, CA (US); Syrus Ziai, Los Altos, CA (US); and Qiaodan Jin Stone, Sunnyvale, CA (US)
Assigned to PSIQUANTUM CORP., Palo Alto, CA (US)
Filed by PSIQUANTUM CORP., Palo Alto, CA (US)
Filed on Jan. 15, 2021, as Appl. No. 17/150,889.
Application 17/150,889 is a continuation of application No. 16/553,068, filed on Aug. 27, 2019, granted, now 10,897,235.
Application 16/553,068 is a continuation of application No. 16/028,288, filed on Jul. 5, 2018, granted, now 10,396,733, issued on Aug. 27, 2019.
Application 16/028,288 is a continuation of application No. PCT/US2018/033042, filed on May 16, 2018.
Claims priority of provisional application 62/572,874, filed on Oct. 16, 2017.
Claims priority of provisional application 62/520,447, filed on Jun. 15, 2017.
Claims priority of provisional application 62/507,193, filed on May 16, 2017.
Prior Publication US 2021/0384878 A1, Dec. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 19/00 (2006.01); H10N 60/30 (2023.01); H10N 69/00 (2023.01); H10N 60/85 (2023.01)
CPC H03F 19/00 (2013.01) [H10N 60/30 (2023.02); H10N 69/00 (2023.02); H10N 60/85 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A system, comprising:
a superconducting subcircuit that includes a plurality of superconducting wires connected in parallel with one another, the superconducting subcircuit including:
a first superconducting wire having a first impedance while the first superconducting wire is in a non-superconducting state; and
a second superconducting wire having a second impedance while the second superconducting wire is in a non-superconducting state, the second impedance being greater than the first impedance; and
a third superconducting wire having a third impedance while the third superconducting wire is in a non-superconducting state, the third impedance being greater than each of the first impedance and the second impedance; and
one or more current sources coupled to the superconducting subcircuit and configured to supply a first current in response to one or more trigger events;
wherein the plurality of superconducting wires are configured to operate in a superconducting state in the absence of the first current;
the first superconducting wire is configured to transition to a non-superconducting state in response to the first current;
the second superconducting wire is configured to transition to a non-superconducting state in response to the first superconducting wire transitioning to the non-superconducting state; and
the third superconducting wire is configured to transition to the non-superconducting state in response to the second superconducting wire transitioning to the non-superconducting state.