Patent ID: 9717917
Date: 2017-08-01
CPC Classifications: A61N,H02J,H04B

Claim:
1. A system for transferring power to, and communicating with, at least one body-implantable active device, said system comprising: an external power transfer system associated with an external device disposed outside of a body, operable to transfer power through a dermis layer to each body-implantable active device, and communicate data to and from each body-implantable active device; and a power receiving system associated with each body-implantable active device, operable to receive power transferred from the external power transfer system, and communicate data to and from the external power transfer system; the external power transfer system including: at least one transmit coil, each corresponding to a respective body-implantable active device; a driver circuit operable to drive the at least one transmit coil with an AC signal; a forward telemetry circuit operable to modulate, responsive to a forward telemetry data input signal, a corresponding data signal within the AC signal; and a back telemetry circuit operable to generate, responsive to a data signal modulated within the AC signal, a corresponding back telemetry data output signal; each power receiving system respectively including: a receive coil tuned to the resonant frequency of the corresponding transmit coil; a charge receiving circuit coupled to the receive coil, said charge receiving circuit operable in a first mode to receive power transferred from the corresponding transmit coil to the receive coil when in proximity thereto, and operable in a second mode to detune the receive coil to substantially inhibit power transfer from the corresponding transmit coil to the receive coil; a forward telemetry circuit coupled to the receive coil, being operable to generate, responsive to a modulated data signal coupled onto the receive coil, a corresponding forward telemetry data output signal; and a back telemetry circuit coupled to the receive coil, being operable to modulate, responsive to a back telemetry data input signal, a corresponding data signal onto the receive coil.