A Fully Integrated AC-DC Converter in 1 V CMOS for Electrostatic Vibration Energy Transducer with an Open Circuit Voltage of 10 V

This paper proposes an AC-DC converter for electrostatic vibration energy harvesting. The converter is composed of a CMOS full bridge rectifier and a CMOS shunt regulator. Even with 1 V CMOS, the open circuit voltage of the energy transducer can be as high as 10 V and beyond. Bandgap reference (BGR) inputs a regulated voltage, which is controlled by the output voltage of the BGR. Built-in power-on reset is introduced, which can minimize the silicon area and power to function normally found upon start-up. The AC-DC converter was fabricated with a 65 nm low-Vt 1 V CMOS with 0.081 mm(2). 1 V regulation was measured successfully at 20-70 degrees C with a power conversion efficiency of 43%.

Automated summary

This paper introduces an AC-DC converter for electrostatic vibration energy harvesting, utilizing CMOS technology to achieve high open circuit voltages. By utilizing a bandgap reference and built-in power-on reset, the converter is able to function normally upon start-up.