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:
May. 16, 2000
Filed:
Jun. 24, 1998
Hans-Ulrich Lochmann, Henstedt-Ulzburg, DE;
August Petersen, Henstedt-Ulzburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
An angle sensor includes a lateral magnetic field sensor element (1) for producing a sensor signal (U.sub.S) which is dependent on the angular position of a target object (6) which is rotatable about an axis of rotation (5). The lateral magnetic field (8) is produced by a magnet (4) which also produces an axial magnetic field (7). Magnetic field sensor elements have a linear characteristic only over an angular range of up to at most 180.degree.. According to the invention, however, in addition to the field sensor element (1) there is also provided a measuring element (2) which determines the direction of an axial magnetic field (7) also produced by magnet (4) and which traverses the measuring element (2). An evaluation circuit (9) is thereby enabled to determine the angular position of the target object (6) from the sensor signal (U.sub.S) produced by the magnetic field sensor element (1) and the direction signal (U.sub.R) produced by the additional measuring element (2), which determination can be performed over an angular range exceeding 180.degree..