Patent ID: 7015794

Claim:
An active transponder including: an electronic unit arranged so as to control several applications or operating modes; an antenna for receiving incoming signals carrying data; and an electric power supply connected to said electronic unit, wherein said electronic unit includes: a data processing unit; means for amplifying incoming signals received by said antenna, and means for validating the incoming signals as a function of mean induced voltages in said antenna, wherein the validating means supplies to said data processing unit a validating signal for data contained in a first incoming signal when a mean voltage on an input side of the data processing unit is greater than or equal to a determined reference voltage, wherein the data processing unit includes means for varying the maximum communication distance to a reader or transceiver as a function of the application selected from said several applications or the operating mode selected from said operating modes, wherein the means for varying the maximum communication distance is arranged to vary one or both of amplification gain of said amplification means and said reference voltage of said validating means.