US Patent 9528858 Inductive sensor

In one embodiment, an electronic device includes an excitation control; a first excitation element coupled to the excitation control; a second excitation element coupled to the excitation control; a target positioned near the first and second excitation elements and within the electromagnetic fields generated by the first and second excitation elements; a receiving element positioned near the target and within the electromagnetic fields generated by the first and second excitation elements; and a signal processor coupled to the receiving element and coupled to the excitation control.