2016 Volume 24 Issue 3 Pages 234-239
In order to evaluate the energy transmission efficiency of capacitive coupling energy transmission systems for an implantable medical device, a precise measurement of received voltage on the order of megahertz is required. In this study, an investigation of a measurement method for received voltage is conducted, when electrical energy is transmitted from the surface of a human phantom (primary) to an implantable device inside this phantom (secondary). To prevent the common-mode current between primary and secondary sides through the ground line, the oscilloscope on the secondary side is driven by an uninterruptible power supply (UPS). In addition, a common-mode filter is inserted in the transmission line. Three types of voltage probes (passive, active, and differential) are used for measuring the received voltage in through the oscilloscope. As a result，an error rate below 0.0003% of the received voltage and a common-mode current of less than 0.9 mA can be obtained from the experiments, when a differential voltage probe is used.
