| CPC G01R 33/06 (2013.01) [G01D 5/14 (2013.01); G01R 15/20 (2013.01); G01R 33/077 (2013.01); G01R 33/09 (2013.01)] | 24 Claims |
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1. A magnetic field sensor chip, comprising:
a chip surface defined by a first dimension that extends along a first axis and a second dimension that extends along a second axis perpendicular to the first axis;
a center of symmetry located on the chip surface, wherein the first axis and the second axis intersect the center of symmetry;
a first sensor bridge circuit comprising a first plurality of magnetic field sensor elements and a second plurality of magnetic field sensor elements, wherein the first plurality of magnetic field sensor elements are positioned symmetrical to the second plurality of magnetic field sensor elements across the center of symmetry, wherein the first plurality of magnetic field sensor elements are separated from the second plurality of magnetic field sensor elements by a first sensor pitch, and wherein the first plurality of magnetic field sensor elements and the second plurality of magnetic field sensor elements are sensitive to a first in-plane component of a magnetic field and are configured to generate a first differential sensor signal based on the first in-plane component of the magnetic field; and
a second sensor bridge circuit comprising a third plurality of magnetic field sensor elements and a fourth plurality of magnetic field sensor elements, wherein the third plurality of magnetic field sensor elements are positioned symmetrical to the fourth plurality of magnetic field sensor elements across the center of symmetry, wherein the third plurality of magnetic field sensor elements are separated from the fourth plurality of magnetic field sensor elements by a second sensor pitch that is equal to the first sensor pitch, and wherein the third plurality of magnetic field sensor elements and the fourth plurality of magnetic field sensor elements are sensitive to a second in-plane component of the magnetic field and are configured to generate a second differential sensor signal based on the second in-plane component of the magnetic field,
wherein the first differential sensor signal and the second differential sensor signal are equal.
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