40.68 MHz Digital On-Off Delay-Compensated Active Rectifier for WPT of Biomedical Applications
Soumitra Pal, Wing‐Hung Ki
Abstract
A digitally controlled on-off delay-compensated 40.68 MHz full-wave active rectifier is proposed for wireless power transfer (WPT) of biomedical applications. It consists of two NMOS active diodes and a cross-coupled PMOS transistor-pair. High efficiency is achieved by digital techniques that eliminate turn-on delay, reverse current and multiple pulsing. The proposed design and one state-of-the-art design are implemented with 0.13 μm CMOS process for comparison. The measured maximum voltage conversion ratio (VCR) is 0.97, and the measured maximum power conversion efficiency (PCE) is 93.2% for a 500 Ω load resistance.
Topics & Concepts
PMOS logicNMOS logicRectifier (neural networks)Wireless power transferElectrical engineeringCMOSTransistorElectronic engineeringMaterials scienceDiodePower semiconductor deviceVoltageEngineeringOptoelectronicsComputer scienceStochastic neural networkRecurrent neural networkElectromagnetic coilMachine learningArtificial neural networkWireless Power Transfer SystemsEnergy Harvesting in Wireless NetworksInnovative Energy Harvesting Technologies