Twist independent mounting of a wheel speed sensor using a differential magnetoresistive sensor

A magnetic circuit, comprising:

• a magnetic sensor to:
• sense a first component of a magnetic field that is angled with respect to an axis formed by an intersection of a first plane and a second plane,
• the first plane being a plane in which a tooth wheel rotates,
• the second plane corresponding to a surface of the magnetic sensor, and
• the first component of the magnetic field lying on the second plane;
• sense a second component of the magnetic field,
• the second component of the magnetic field lying on the second plane;
• determine a speed signal, associated with a rotation of the tooth wheel, based on the first component of the magnetic field and the second component of the magnetic field;
• and
• provide an output based on the speed signal.

A differential sensor comprising:

• a first magnetoresistive (MR) sensing element and a second MR sensing element,
• the first MR sensing element being capable of sensing a first component of a magnetic field that is at a non-zero angle with respect to an axis formed by an intersection of a first plane and a second plane,
• the first plane being a plane in which a tooth wheel rotates,
• the second plane corresponding to a surface including the first MR sensing element the second MR sensing element, and
• the first component of the magnetic field being on the second plane;
• and
• the second MR sensing element being capable of sensing a second component of the magnetic field,
• the second component of the magnetic field being on the second plane.