CONTACTLESS COMMUNICATION METHOD WITH NEGATIVE MODULATION

摘要

The present invention concerns a method of radio-frequency communication between a contactless transponder (1A) and a reader, in which at least one sideband (BLI) of the carrier frequency (Fc) is used for communicating a response from the transponder by modulation of the amplitude (V) of this carrier frequency. The method is distinguished in that the modulation at least partly applies a modulation level greater than 100%, which causes a negative modulation (MOD B). The invention also concerns a corresponding communication circuit.