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Title: A fully autonomous integrated interface circuit for piezoelectric harvesters
Authors: Hehn, Thorsten
Hagedorn, Friedrich
Maurath, Dominic
Marinkovic, Djordje
Kuehne, Ingo
Frey, Alexander
Manoli, Yiannos
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Hehn, T., Hagedorn, F., Maurath, D., Marinkovic, D., Kuehne, I., Frey, A., & Manoli, Y. (2012). A fully autonomous integrated interface circuit for piezoelectric harvesters. IEEE journal of solid-state circuits, 47(9), 2185-2198.
Series/Report no.: IEEE journal of solid-state circuits
Abstract: This paper presents a fully autonomous, adaptive pulsed synchronous charge extractor (PSCE) circuit optimized for piezoelectric harvesters (PEHs) which have a wide output voltage range 1.3-20 V. The PSCE chip fabricated in a 0.35 μm CMOS process is supplied exclusively by the buffer capacitor where the harvested energy is stored in. Due to the low power consumption, the chip can handle a minimum PEH output power of 5.7 μW. The system performs a startup from an uncharged buffer capacitor and operates in the adaptive mode at storage buffer voltages from 1.4 V to 5 V. By reducing the series resistance losses, the implementation of an improved switching technique increases the extracted power by up to 20% compared to the formerly presented Synchronous Electric Charge Extraction (SECE) technique and enables the chip efficiency to reach values of up to 85%. Compared to a low-voltage-drop passive full-wave rectifier, the PSCE chip increases the extracted power to 123% when the PEH is driven at resonance and to 206% at off-resonance.
DOI: 10.1109/JSSC.2012.2200530
Fulltext Permission: none
Fulltext Availability: No Fulltext
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