Patent ID: 8548597

Claim:
An external coil assembly for an inductively coupled implant on the human or animal body, comprising: a transmitting circuit connected to a transmitting coil to transmit signals to the implant; a receiving circuit connected to a first receiving coil to receive signals from the implant, the first receiving coil exhibiting a first coupling coefficient with the transmitting coil; and a second receiving coil connected to the receiving circuit to receive signals from the implant, the second receiving coil exhibiting a second coupling coefficient with the transmitting coil, wherein the first coupling coefficient is substantially identical to the second coupling coefficient and the first receiving coil and the second receiving coil are located on a same side of the transmitting coil, and wherein, when seen from said side, the first receiving coil and the second receiving coil overlay the transmitting coil, wherein each of the first receiving coil and the second receiving coil comprises an electrical shield layer.