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:
Feb. 03, 2004
Filed:
Oct. 01, 2002
Michael Muth, Stelle, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method for offset compensation of a magnetoresistive position or angular position measuring system includes at least one Wheatstone bridge with four locally offset magnetoresistive resistors to which a DC voltage is applied and past which a permanent magnet is moved, wherein the respective bridge voltage is measured, by which method a subsequent offset compensation of magnetoresistive position or angular position measuring systems is also possible on site. Provision is made for a calibration cycle to be run through upon start-up of the measuring system, by moving the permanent magnet past the bridge(s) for a measuring cycle, evaluating the extreme values of the bridge voltages measured during this procedure by deriving the mean values thereof, and deriving from these mean values corresponding compensation values in the form of offset values to be taken into consideration by the measuring system, the compensation values being stored in a register.