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:
Nov. 23, 1993
Filed:
Mar. 19, 1991
Leon Riebman, Rydal, PA (US);
AEL Defense Corp., Lansdale, PA (US);
Abstract
A superconducting non-linear device comprising a superconducting conductor, a current source associated with the conductor for applying to the conductor a bias current, and a control device associated with the current source for selectably varying the bias current between a first value below the critical current for the conductor means and a second value above the critical current. The non-linear device is a switching device comprising a switching element in the form of a superconducting film, a terminal for inputting a signal to the switching element, a terminal for outputting a signal from the switching element, and a circuit for applying a DC bias current to the switching element and for causing the DC bias current to vary between a first value below the critical current for the superconducting film and a second value above the critical current. The non-linear device is a square-law detector device comprising a thin-film superconductor, a terminal for coupling an RF signal to be detected to an input zone of the superconductor, a circuit for applying a DC bias current to the superconductor, the bias current being of a value to constrain the superconductor to operate in the quadratic portion of its resistance-current operating characteristic, and a circuit for obtaining a detected output signal from an output zone of the superconductor.