Skip to main content
APEC 2026 Main banner

Energy Harvesting and Power for IoT

D20.7 - A Self-Sensing Synchronized-Switch Circuit for Multi-Input Piezoelectric Energy Harvesting

Thursday, March 26, 2026
12:00 PM - 1:45 PM CT
Location: Hemisfair Ballroom
While multi-input piezoelectric energy harvesting (PEH) holds significant promise, it is critically limited by the inability of existing circuits to effectively sense the dynamic and asynchronous motion of individual piezoelectric transducers (PZT). To address this challenge, a novel multi-input and self-sensing synchronous electric charge extraction (MISS-SECE) interface circuit is proposed. This innovative design leverages a voltage quantization technique to autonomously extract full-cycle real-time frequency and displacement information. This self-sensed data is then utilized to precisely control the switching actions, which is pivotal for maximizing energy conversion efficiency. Validated through experiments with two piezoelectric transducers, the proposed circuit achieved a 59.79% improvement in harvested power output compared to a multi-input standard energy harvesting (MI-SEH) circuit. This work demonstrates that integrating self-sensing capabilities offers a robust solution for optimizing multi-input PEH systems, leading to more efficient energy harvesting applications.