Patent ID: 6847205

Claim:
An angular position sensor ( 5 ) comprising: a ferromagnetic ring ( 3 ) having an axis ( 8 ); a magnetic source ( 1 ) disposed substantially at the center of the ring ( 3 ) and generating a magnetic field following a magnetic direction ( 6 ) that is generally perpendicular to the axis ( 8 ) of the ring ( 3 ); a Hall-effect cell ( 2 ) disposed inside the ring ( 3 ) on a radius ( 7 ) passing through the center of the ring and perpendicular to the magnetic direction ( 6 ) and to the axis ( 8 ) of the ring ( 3 ), said Hall-effect cell ( 2 ) measuring the radial magnetic field; a magnetic flux guide ( 4 ) interposed between the magnetic source ( 1 ) and the Hall-effect cell ( 2 ), said magnetic flux guide being rotatable about the magnetic source following the axis ( 8 ) of the ring ( 3 ).