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. 17, 2004
Filed:
Nov. 12, 2002
Quentin P. Herr, Torrance, CA (US);
Lynn A. Abelson, Rancho Palos Verdes, CA (US);
George L. Kerber, San Diego, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
The self inductance associated with a capacitance A in a superconductor integrated circuit (FIG. ) is reduced by adding a layer of superconductor metal (A ) overlying the capacitor, effectively producing a negative inductance to counteract the self-inductance of the capacitor leads, thereby reducing inductance of the circuit. As a result it possible to transfer a single flux quantum (“SFQ”) pulse through the capacitor. Capacitors ( and FIG. ) of the foregoing type are incorporated in superconductor integrated circuit SFQ transmission lines (FIG. ) to permit SQUID-to-SQUID transfer of SFQ pulses, while maintaining the circuit grounds of the respective SQUIDs in DC isolation. Bias current ( ) may be supplied to multiple SQUIDs ( & & FIG. ) serially, reducing the supply current required previously for operation of multiple SQUIDs.