Patent ID: 7482803
Filing Date: 2009-01-27
Classification: G01D

Abstract:
1. An apparatus for providing a signal related to a position of a coupler element, the apparatus including: an exciter coil, the exciter coil being operable to generate magnetic flux when the exciter coil is energized; a receiver coil, the receiver coil being operable to generate a receiver signal when the exciter coil is energized due to an inductive coupling between the receiver coil and the exciter coil, the inductive coupling being modified by movement of the coupler element so that the receiver signal is correlated with the position of the coupler element, the receiver coil having a first section generating a first section signal, and a second section generating a second section signal; and an electronic circuit, operable to generate a position-dependent signal using the receiver signal, the position-dependent signal being correlated with the position of the coupler element, the electronic circuit being further operable to generate a position-independent signal using the first section signal and the second section signal, the position-independent signal being substantially independent of the position of the coupler element.