Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tatsuya Kitanaka0
Kouichirou Matsumoto0
Takashi Kawashima0
Date of Patent
March 9, 2010
0Patent Application Number
118744590
Date Filed
October 18, 2007
0Patent Primary Examiner
Patent abstract
A rotation angle detecting device includes a permanent magnet member, a pair of magnetic sensor elements disposed in a magnetic field formed by the permanent magnet member to provide a pair of output voltage signals when the magnetic field changes as the rotating object rotates; and a rotation angle calculating unit. The rotation angle calculating unit calculates a phase difference between the pair of output voltage signals from a magnitude of the output signal of one of the magnetic sensor elements when detecting a specific magnitude of the output signal of the other magnetic sensor elements whose phase angle is known.
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