Patent ID: 8564413
Filing Date: 2013-10-22
Classification: G06K,H04B

Abstract:
1. A method for configuring a terminal capable of emitting a radio-frequency field for a transponder, comprising, in the presence of a transponder within the range of the terminal, at least one step of adapting a series resistance of an oscillating circuit of the terminal, according to an off-load value, which depends on an operation of the terminal while no transponder is in its field, to control coupling of radio frequency energy, at a reference frequency, from the oscillating circuit of the terminal to an oscillating circuit of the transponder, wherein said off-load value is characteristic of the current in the oscillating circuit of the terminal, further comprising the steps of: measuring information representative of the current in the oscillating circuit of the terminal with a first value of series resistance of this oscillating circuit; comparing this information with said off-load value; and modifying the series resistance towards a second value selected according to the first value, to the measured information, and to said off-load value, comprising determining the second value as wherein R