Rotation angle detection device
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jun 21, 2012
app pub date -
Dec 15, 2011
filing date -
Dec 15, 2010
priority date (Note) -
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Abstract
A rotation angle calculation unit includes a first rotation angle calculation portion, a second rotation angle calculation portion, a third rotation angle calculation portion, an abnormality monitoring portion, and a final rotation angle calculation portion. The abnormality monitoring portion determines, based on a first output signal, a second output signal, and a third output signal, whether the first to third output signals are each normal or abnormal. The final rotation angle calculation portion calculates a final rotation angle based on the final determination result obtained by the abnormality monitoring portion and the first to third rotation angles calculated by the first to third rotation angle calculation portions, respectively.
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