Patent ID: 8432163
Filing Date: 2013-04-30
Classification: B82Y,G01R

Abstract:
1. A method for cancellation of low frequency noise in a magneto-resistive mixed sensor comprising at least a superconducting loop with at least one constriction and at least one magneto-resistive element associated with said at least one constriction, characterized in that it comprises a set of measuring steps with at least one measuring step being conducted with the normal running of the mixed sensor, no additional current being injected in any constriction of any loop so that only the signal to be sensed is measured, and at least another measuring step being conducted whilst an additional super-current is temporarily injected in said at least one constriction of said at least one superconducting loop of the mixed sensor up to a critical super-current of the said constriction so that the result of the said at least another measuring step is used as a reference level of said at least one magneto-resistive element, and in that the cycle of one set of measuring steps is performed at a sampling frequency which is at least two times higher than the maximal frequency to be detected.