An N-Path Switched-Capacitor Rectifier for Piezoelectric Energy Harvesting Achieving 13.9× Power Extraction Improvement

摘要

This paper presents an N-path switched-capacitor rectifier which is capable of realizing staircase conjugate impedance matching, without the use of inductors, to maximize the power transfer from a piezoelectric transducer. Measurements of the 0.18μm CMOS prototype demonstrate 13.9× improvement in extracted power compared to an ideal full-bridge rectifier.