An Optimized 1.47 GHz Rectifier for Wirelessly Powering Ultra-Low Power Implantable Medical Devices

This paper studies modifications to the PMOS array in a differential threshold voltage cancellation rectifier to increase efficiency. It successfully designs a new high-efficiency rectifier circuit operating at 1.47 GHz and achieving voltage conversion efficiency and power conversion efficiency of 89.4054% and 53.3475%, respectively. By using 90nm technology, the novel rectifier is able to convert an AC signal to a DC signal in an efficient and consistent manner for an ultra-low power implantable medical device. Furthermore, due to its on-chip integrability, the rectifier circuit allows for easy integration into the receiver chip of implantable medical devices, allowing for greater flexibility in device design and placement.