An AC–DC Rectifier With Active and Non-Overlapping Control for Piezoelectric Vibration Energy Harvesting

This brief presents an ac-dc rectifier for piezoelectric vibration energy harvesting application. The proposed rectifier is designed and implemented with TSMC 0.25 μm 1P3M 5-V CMOS process. Active control is proposed to eliminate the voltage drop from the traditional diode forward voltage and the reverse current from the output capacitor to input source. The simultaneously turn on and oscillation on power MOS M
_N1
- M
_N2
gate signal V
_GN1
- V
_GN2
has been overcome by a 40-ns delay time which generated by a non-overlapping control. The experimental results indicated maximum power efficiency 95% and voltage conversion ratio 99% are achieved at 20 kΩ and 200 kΩ loading resistor.