data - detector circuit for rfid labels , wherein the package is detected using two circuits , a polarizing circuit and a polarized circuit . the polarization signal can be sent from the polarizing circuit to the polarized circuit via a low - pass filter . the reference signal for comparison with the package detected is generated on the basis of the package attenuated by means of a voltage splitter . the reference signal is filtered via a low - pass filter . the resulting circuit has the characteristics of low consumption and high sensitivity .