A HARMONICS-BASED WIRELESS TRANSMISSION DEVICE AND ASSOCIATED METHOD

摘要

An embodiment of the device (1) has an external unit (2) that transmits a power signal to a wireless power receiver (7) in an implant (3). This received waveform provides the implant (3) with a sinusoidal input signal at a first frequency. This is fed to a rectifier (8) to provide a substantially direct current signal which is used as a power source for the implant (3). The sinusoidal input signal is also fed to a non-linear block (11), which modifies the input signal to provide a non- sinusoidal intermediate signal having a spectrum with at least one harmonic component at a second frequency different to the first frequency. The intermediate signal is fed to a filter (14) to provide an output signal substantially at the second frequency. The output signal may be used to transmit data to the external unit (2). In the event of a low quality communications link between the external unit (2) and the implant (3), the power signal may be modified so as to modify the output signal.