Towards an Open-Source Wireless Power and Data Transfer Library for Implantable and Wearable Medical Devices

This paper presents the design of an open-source wireless power and data transfer (WPDT) unit for implantable and wearable medical devices (IWMD) using a parameterized-cells (P-Cells) library of commonly used building blocks. The P-Cells are designed with open-source design tools Ngspice and Xschem, and use Python as modeling and scripting language. Based on input specifications, four blocks including a capacitor bank, load-shift keying modulator, full-wave rectifier, and low-dropout regulator have been automatically designed using the P-Cells. To highlight the versatility of our approach, two units with different load specifications have been implemented in the open-source IHP SG13G2 130 nm process. Simulation results demonstrate agreement with the specifications and the viability of our approach.