ENERGY EFFICIENCY EVALUATION OF VOLTAGE CONTROL AND FREQUENCY CONTROL OVER AN INDUCTIVE POWER LINK FOR BIOMEDICAL IMPLANTS Topics: Biomechanical Devices; Biomedical Equipment; Biotelemetry; Implantable Electronics; Wireless Systems In Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 0BIOSTEC, 359-363, 2012 , Vilamoura, Algarve, Portugal