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This paper introduces a topology to combine multiple low voltage Piezoelectric Energy Harvesters with the goal of widening its harvestable frequency range and improving the power output. The architecture uses a shared inductor scheme and a rectifier-free approach. The proposed harvester is able to handle multiple harvesters efficiently by harvesting the peak energy from each harvester. The proposed...
Discontinuous-conduction mode (DCM) operation is usually employed in DC-DC converters for small inductor on printed circuit board (PCB) and high efficiency at light load. However, it is normally difficult for synchronous converter to realize the DCM operation, especially in high frequency applications, which requires a high speed and high precision comparator to detect the zero crossing point at cost...
This brief presents a piezoelectric vibration power conditioning integrated circuit for energy autonomous sensor applications. The proposed circuit includes a negative voltage converter, a noninverting buck–boost converter working in discontinuous conduction mode (DCM), and a switching clock generator. Optimum load resistance is synthesized by the DCM buck–boost converter to achieve maximum power...
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