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:
Dec. 10, 1996
Filed:
Feb. 16, 1995
Gerjan F Van De Walle, Eindhoven, NL;
Franciscus P Widdershoven, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A magnetic field sensor includes a number of magnetoresistive sensor elements situated in one plane, and which have the same privileged directions of magnetization, and a magnetization coil connected to a current pulse generator which alternately supplies the magnetization coil with opposite current pulses to generate a magnetic field which extends parallel to the privileged directions of the sensor elements and is strong enough to reverse the direction of internal magnetization thereof The magnetization coil includes an electrically insulating substrate which supports an approximately spiral-shaped electric conductor track including a group of parallel arranged active conductor elements. An electric current flows through the conductor track in the same direction in all active conductor elements of the relevant group. The magnetic field sensor is mounted on the substrate in the immediate vicinity of the group of active conductor elements such that the plane of the sensor elements extends substantially parallel to the plane of the active conductor elements and the privileged direction of magnetization of the sensor elements extends perpendicular to the longitudinal direction of the active conductor elements.