Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
December 14, 2010
Patent Application Number
11926583
Date Filed
October 29, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A highly accurate displacement sensor using GMR elements for detecting displacement of a physical quantity such as angle provides a diminished waveform distortion of output voltage. At least two Wheatstone bridge circuits having a predetermined angular offset are installed, with each bridge circuit including a plurality of GMR elements. Each of the GMR elements has a fixed magnetic layer set to a predetermined magnetization direction. An AC power supply is used, and displacement of a physical quantity, such as a rotational angle, is detected on the basis of AC-modulated outputs from the bridge circuits.
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