Under the WPC standard, the low power consumption of wireless transmission means that the power consumption is only 0 to 5W. The system that achieves this standard uses inductive coupling between two planar coils to transmit electricity from the power transmitter to the power receiver. The distance between the two coils is generally 5mm. The output voltage regulation is responsible for a global digital control loop, when the power receiver will communicate with the power transmitter and require more or less power consumption. The communication is a one-way communication through the backscatter modulation from the power receiver to the power transmitter. In backscatter modulation, the power receiver coil is loaded, thus changing the current consumption of the power transmitter. We monitor these current changes and demodulate the information needed to coordinate the work of the two devices.