Patent ID: 7652469

Claim:
An inductive position sensor including: a relatively movable scale; and a reading head, the scale comprising a spatially periodic series of conducting or permeable features of spatial period T, and the reading head comprising drive and sense windings facing the scale with a spatially periodic configuration of spatial period 2T along the scale, wherein the windings facing the scale are all divided into at least one pair of identical winding elements, each winding element having the same relative location within one of at least one pair of distinct winding element patterns and having the same shape, the winding elements of the at least one pair have a center-to-center distance equal to NT+T/2, N being an integer, and the at least one pair of winding elements of each drive winding and of each sense winding being connected so that their polarities are either opposed for each drive winding and the same for each sense winding, or the same for each drive winding and opposed for each sense winding.