A Bootstrapped Comparator-Switched Active Rectifying Circuit for Wirelessly Powered Integrated Miniaturized Energy...

Area of Science:

• Biomedical Engineering
• Electrical Engineering
• Materials Science

Background:

• Increasing human life expectancy is linked to technological advancements in biomedical electronics.
• Wearable and implantable devices require efficient wireless power solutions.
• Traditional diode circuits in power systems have limitations.

Purpose of the Study:

• To propose a new architecture for wireless power supply systems in biomedical applications.
• To improve the performance of energy harvesters in terms of power conversion.
• To enable uninterrupted, permanent wireless power for biomedical devices.

Main Methods:

• Developed a novel architecture replacing traditional diode circuits with a MOS harvester.
• Leveraged near-ideal power transistor switching and reverse current prevention.
• Designed and verified the system using TSMC 180-nm process for wireless near-field power supply.

Main Results:

• Achieved Voltage Conversion Efficiency (VCE) of 73.55-95.12%.
• Achieved Power Conversion Efficiency (PCE) of 80.36-90.08%.
• Demonstrated high performance with output loads of 0.1-1 kΩ under 3.3 V ac input, within a 1.189 mm² area.

Conclusions:

• The proposed MOS harvester significantly enhances power conversion efficiency for wireless biomedical systems.
• This technology creates a niche for "green-energy" miniaturized energy sensing systems.
• Enables cutting-edge, wirelessly powered biomedical electronics applications.