DUTY CYCLE OF AN OUTPUT SIGNAL OF A MAGNETIC FIELD SENSOR TO DETECT SPEED AND DIRECTION OF ANGULAR ROTATION OF A ROTATING MAGNETIC STRUCTURE OR A FAULT

摘要

In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. A duty cycle percentage of the output signal indicates the speed and the direction or indicates a fault.