Patent ID: 7019672
Filing Date: 2006-03-28
Classification: G06F

Abstract:
1. A position detector comprising: first and second members which are moveable relative to each other; said first member comprising an excitation winding and at least one sensor winding: an excitation circuit for applying a driving signal to the excitation winding; and said second member comprising means for interacting with said windings such that, in response to a driving signal being applied to said excitation winding by said excitation circuit, there is generated in the or each sensor winding an output signal, said interacting means and said windings being arranged so that said output signal varies as a function of the relative position of the first and second members, wherein the excitation circuit is arranged to apply a sequence of voltage pulses across said excitation winding, with the duration of said pulses being less than a decay time constant of a current loop formed by said excitation circuit and said excitation winding.