Modeling Efficient Inductive Power Transfer Required To Supply Implantable Devices

Abstract

This paper presents a model for inductively coupled links with an integrated receiver on silicon. To be accurate, this model includes losses related to the integration of the receiver The modelling technique of the receiver coil has been verified using Agilent Momentum Electro-Magnetic simulations. This comprehensive model is employed to obtain maximum power efficiency by performing a discrete optimization of the geometric dimensions of the link coils. The optimized link can deliver 50mW to a visual cortical stimulator and monitoring devices with an efficiency of 21% at a distance of 1cm. The receiver has 4mm of diameter