| 摘要 |
The invention provides a polarity sensitive magnetic sensor comprising: at least one pair of magnetic sensing elements, wherein the first and second magnetic snesing elements (1a, 1c) of a first pair are connected in a bridge arrangement; a source of a magnetic field bias (5) that acts substantially equally on the first and second magnetic sensing elements (1a, 1c), said magnetic field bias (5) being in a direction substantially perpendicular to a sensing direction (8) of the sensor; a structure (6) of magnetically soft material configured to channel a magnetic flux to be sensed and to rotate at least a portion of said magnetic flux, whereby the magnetic flux in the soft magnetic structure has a component in the direction of the magnetic field bias in a first region of the structure (6), and an equal component in the direction opposite to the magnetic field bias in a second region of the structure; and wherein the first and second magnetic sensing elements (1a, 1c) are located in different gaps (7a, 7c) being located in the first and second regions of the structure (6), respectively.
|
