Magneto-resistive angle sensor and sensor system using the same

A magneto-resistive angle sensor, comprising:

• a first full bridge circuit having a first and fourth magneto-resistive element and a second and third magneto-resistive element, and
• a second full bridge circuit comprising a fifth and eighth magneto-resistive element, and a sixth and seventh magneto-resistive element,
• wherein the first to eighth magneto-resistive elements are arranged parallel to a x′/y′-plane of a Cartesian reference system with an x′-axis and y′-axis, both orthogonal to each other;
• wherein a geometrical gravity center of each of the first to eighth magneto-resistive elements of the first and second full bridge circuits have, a within a tolerance range, a vanishing y′-coordinate,
• wherein a value of a geometrical deviation moment of each of the first to eighth magneto-resistive elements in the x′/y′-plane, within a tolerance range, vanishes,
• wherein the geometrical gravity centers of the first and second magneto-resistive elements of the first full bridge have, within a tolerance range, an identical first x′-coordinate, and the geometrical gravity centers of the third and fourth magneto-resistive elements of the first full bridge have, within a tolerance range, an identical second x′-coordinate, wherein the first and second x′-coordinates have, within a tolerance range, an equal magnitude and an opposite sign,
• wherein the geometrical gravity centers of the fifth and sixth magneto-resistive elements of the second full bridge circuit have, within a tolerance range, an identical third x′-coordinate, and the geometrical gravity centers of the seventh and eighth magneto-resistive elements of the second half bridge circuit have, within a tolerance range, an identical fourth x′-coordinate, wherein the third and fourth x′-coordinates have, within a tolerance range, an equal magnitude and an opposite sign, and
• wherein the first and second magneto-resistive elements have, within a tolerance range, a same geometrical inertia moment around the y′-axis, the third and fourth magneto-resistive elements have, within a tolerance range, a same geometrical inertia moment around the y′-axis, the fifth and sixth magneto-resistive elements have, within a tolerance range, a same geometrical inertia moment around the y′-axis, and the seventh and eighth magneto-resistive elements have, within a tolerance range, a same geometrical inertia moment around the y′-axis.

A magneto-resistive angle sensor, comprising:

• a first half bridge circuit comprising a first magneto-resistive element and a second magneto-resistive element, and
• a second half bridge circuit comprising a third magneto-resistive element and a fourth magneto-resistive element;
• wherein the first, second, third, and fourth magneto-resistive elements comprise a layout having two orthogonal meanders, wherein the meanders cover a rectangular area,
• wherein the first, second, third, and fourth magneto-resistive elements are arranged parallel to a x′/y′-plane with respect to a Cartesian reference system with an x′-axis and y′-axis, both orthogonal to each other;
• wherein a geometrical gravity center of each of the first and the second magneto-resistive elements of the first half bridge circuit have essentially an identical x′-coordinate,
• wherein a geometrical gravity center of each of the third and the fourth magneto-resistive elements of the second half bridge circuit have essentially an identical x′-coordinate,
• wherein a sum of a value of a geometrical inertia moment of the first magneto-resistive element around the y′-axis, a negative value of a geometrical inertia moment of the second magneto-resistive element around the y′-axis, a value of a geometrical deviation moment of the third magneto-resistive element in the x′-y′ plane and a negative value of a geometrical deviation moment of the fourth magneto-resistive element in the x′-y′ plane essentially vanishes, and
• wherein a sum of a value of a geometrical inertia moment of the third magneto-resistive element around the y′-axis, a negative value of a geometrical inertia moment of the fourth magneto-resistive element around the y′-axis, a negative value of a geometrical deviation moment of the first magneto-resistive element in the x′-y′ plane and a value of a geometrical deviation moment of the second magneto-resistive element in the x′-y′ plane essentially vanishes.