Adaptation of a transmission between a terminal and an electromagnetic transponder

摘要

The method involves determining an electromagnetic transponder based on a difference between a measured value of a piece of information representative of current in an oscillating circuit of the terminal and a no-load value of this piece of information. The piece of information is proportional to voltage across a capacitive element of an oscillating circuit of the terminal. The no-load value is stored at a time when no transponder is present in a field. The piece of information is measured during frames periodically transmitted by the idle terminal.