| 摘要 |
A multiplexing arrangement (32) for an electronic article surveillance and identification system interconnects a transmitter (12) and a plurality of antennas (24-1, 24-2). The transmitter has first and second terminals (20, 22) and each of the antennas includes an antenna coil (26). The multiplexing arrangement includes a step down transformer (34) that has a primary winding (36) connected across the first and second terminals of the transmitter, and also has a secondary winding (38). First and second windings (30) are respectively positioned for inductively coupling with the antenna coils of first and second antennas (24-1, 24-2). The multiplexing arrangement also includes a first switch (44) and wiring that forms a series loop connection (48) including the first winding, the second winding, the first switch and the secondary winding of the transformer. The first switch is arranged to selectively open-circuit the series loop connection.
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