Methodology for Reduction of Noise Interference in Wireless Charging Implantable ECG Sensor

According to commercialization of implantable medical devices (IMDs), wireless charging system is necessary to solve the problem of battery duration. However, magnetic field generated by the wireless charging system may cause magnetic interference to the IMDs, especially, implantable ECG sensor. Therefore, this paper proposes a methodology for reduction of the noise interference at the implantable ECG sensor with wireless charging system. The methodology is to design the pattern of the trace between the sensing electrodes of the sensor using the effect of canceling the magnetic vectors. By applying the methodology, reduction of the noise interference was verified through simulation and measurement.