Dual-axis anisotropic magnetoresistive sensors

A sensor, comprising:

• a first sensor unit having a resistor bridge including a plurality of magnetoresistors, each magnetoresistor having at least one elongated strip of anisotropic magnetoresistive material having a longitudinal axis substantially parallel to a technological anisotropy axis of the magnetoresistive material;
• and
• a second sensor unit having a resistor bridge including a plurality of magnetoresistors having a plurality of elongated strips of the anisotropic magnetoresistive material, wherein the plurality of magnetoresistors each include a strip from both a first and second subset of strips, wherein
• the first subset of strips have longitudinal axes aligned at a first angle to the technological anisotropy axis, and
• the second subset of strips have longitudinal axes aligned at a second angle to the technological anisotropy axis, wherein the second angle has substantially the same magnitude but opposite polarity as the first angle.

A sensor, comprising:

• a first sensor unit, on an integrated circuit substrate, having a resistor bridge including a plurality of magnetoresistors, each magnetoresistor having at least one elongated strip of anisotropic magnetoresistive material having a longitudinal axis substantially parallel to a technological anisotropy axis of the magnetoresistive material;
• a second sensor unit, on the integrated circuit substrate, having a resistor bridge including a plurality of magnetoresistors having a plurality of elongated strips of the anisotropic magnetoresistive material, wherein the plurality of magnetoresistors include:
• a first subset of magnetoresistors having strips with longitudinal axes aligned at a first angle to the technological anisotropy axis, and
• a second subset of magnetoresistors having strips with longitudinal axes aligned at a second angle to the technological anisotropy axis, wherein the second angle has substantially the same magnitude but opposite polarity as the first angle;
• and
• at least one conductive coil configured to selectively generate a plurality of different magnetic fields in the plurality of magnetoresistors of the second sensor unit to selectively set a magnetization of the plurality of magnetoresistors of the second sensor unit to different directions.