An Ultra-Efficient and Compact Flipping-Input Synchronized Switch Harvesting on Inductor and Capacitors Interface Circuit for Piezoelectric Energy Harvesting

This paper introduces a high-performance flipping-input synchronized switch harvesting on inductor and capacitors (FI-SSHIC) piezoelectric energy harvesting interface circuit. The unique design approach involves segmenting the flipping stages, enabling the FI-SSHIC to execute 17 phase flips utilizing merely a diminutive inductor of 5μH and 8 compact capacitors. By circumventing the traditional full bridge rectifier (FBR) and streamlining the switch count, this study's flipping efficiency soars to an impressive 96.3%. When juxtaposed with SSHC and SSHI, utilizing identical capacitor and inductor dimensions, our design yields a 15.1% and 59.3% enhancement in output power, respectively. Furthermore, the pinnacle of power efficiency exhibits a staggering 648% augmentation when compared to the ideal FBR, underscoring the advancements proffered by our proposed circuit.