Figure 4From: Using field strength scaling to save energy in mobile HF-band RFID-systemsReplacement circuit of the power transfer over RFID. This replacement circuit describes the power transfer from the reader to the transponder without the voltage regulation on transponder-side, adapted from [19]. In this case, the input current i r is scaled by the resistance R r e l . U2 represents the supply voltage of the transponder.Back to article page