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:
Apr. 15, 2003
Filed:
Nov. 14, 2000
Claude Gudel, Le Pas de l'Echelle, FR;
Liaisons Electroniques-Mecaniques LEM S.A., Plan-les-Ouates, CH;
Abstract
The invention concerns a sensor including a magnetic circuit coupled with a primary conductor, a secondary winding coupled with the magnetic circuit, a damping resistor, a magnetic field detector arranged in an air gap of the magnetic circuit and a powering device supplying the secondary winding with a current tending to compensate the magnetic field in the air gap. A measuring resistor is connected in series to the secondary winding and an auxiliary resistor of same value as the damping resistor is connected to the secondary winding and the measuring resistor common connection point. A difference amplifier set is arranged for measuring the voltage at the secondary winding terminals and applying, to the auxiliary resistor, a voltage equal and in opposite direction to the one occurring at the secondary winding terminals.