Transponder communication device for the contactless communication with a plurality of individually selectable transponders, and transponder for the contactless communication with at least one transponder communication device
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United States of America Patent
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Aug 1, 2000
Grant Date -
N/A
app pub date -
Jan 20, 1998
filing date -
Jan 21, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
In a transponder communication device (1) having a selector for the successive individual selection of transponders (2) the selector having interrogator (5) for generating at least one item of interrogation information (AFI) with which the transponders (2) can be interrogated to transmit answer information (AWI) in response to the interrogation information (AFI), and time-window generator (17) for generating a series of K successive time windows (ZF) and controller (20) for the time-window generator (17), which controller can activate the time-window generator (17) so as to generate the series F of K time windows (ZF) a number of times in succession, and evaluator (22) which cooperates with the time-window generator (17) and by which, depending on the occurrence of at least one item of answer information (AWI) transmitted to the transponder communication device (1) by a transponder (2) in response to interrogation information (AFI), a transponder (2) can be selected in at least one time window (ZF) in each series (F) of the series (F) of K time windows (ZF) generated a number of times in succession.
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