Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 28, 2009
Patent Application Number
11100910
Date Filed
April 7, 2005
Patent Primary Examiner
Patent abstract
A method of controlling an electronic compass assembly includes calibrating magnetic field sensors to produce a calibration product and determining whether a magnetic interference condition exists based upon the calibration product. In one example, the calibration product includes a calibration ellipse. In another example, the method includes determining a first length of time that corresponds to a duration of a magnetic interference condition or a second length of time that corresponds to an elapsed time after the magnetic interference condition. A portion of the electronic compass is controlled based upon the first length of time or the second length of time.
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