Patent ID: 6459882
Filing Date: 2002-10-01
Classification: H02J,H04B,H04M

Abstract:
An inductive communications system supporting bidirectional communications, comprising:a base unit transducer system including (i) at least three orthogonal transducers, (ii) a selector, coupled to said orthogonal transducers, for selectively energizing at least one of said orthogonal transducers to generate a first inductive field and (iii) a receiver circuit connected to said orthogonal transducers, for receiving and decoding a second inductive field on at least one of said orthogonal transducers; and a portable unit, disposed away from said base unit transducer system and within the first inductive field, the portable unit including: a portable unit transducer system including a single inductive transducer for generating the second inductive field, the base unit transducer system selecting, based on a field received from the single inductive transducer of the portable unit, one or more of the at least three orthogonal transducers of the base unit transducer system for transmission of a field to the portable unit.