Magellan Corporation (Australia) Pty. Ltd.

Other

Magellan Corporation (Aust.) Pty. Ltd.

David R Brooks

Graham A Murdoch

The present invention relates to the areas of communication and/or identification of remote devices (active or passive). The invention has application where there is a need to identify or communicate with more than one remote device. The remote device may be embodied as a transmitter arrangement, transducer, transponder or responder. In particular, the present invention calls for each remote device to include a transmitter means in which, at each transmission, a carrier frequency or medium is newly selected.

Communication device and method(s)

A successive-approximation register (SAR) has a single shift register for processing, that is presetting and selectively resetting, a number of bits. The single shift register is arranged to provide bit selection for processing the bits and also to provide desired result accumulation in the processed bits. Further, the single shift register comprises an array of stages, the stages including a first stage, a last stage and a number of active stages equal to the number of bits of digital output. Conveniently, the SAR adopts a 'One-bits to Right' test implemented by a Manchester Carry Chain in the opposite direction to the shift direction.

Successive-approximation register

An identification system comprising a transponder having receiver means adapted to extract powering energy from a surrounding electromagnet field, transponder transmitter means adapted to transmit at least one unique signal from the transponder, frequency generating means for generating a plurality of pre-determined frequencies, each frequency adapted to carry the signal from the transmitter means to an interrogator receiver means adapted to receive said signals to achieve identification of said transponder, said transponder transmitting signals successively or repetitively using at each successive or repetitive transmission a newly selected frequency or set of newly selected frequencies.

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Perth, Australia

David R Brooks