Charge-pumping with finger capacitance in a custom electrostatic energy harvesting ASIC
We present an integrated circuit capable of scavenging energy from repetitive changes in finger touch capacitance. A finger tapping on this application-specific integrated circuit generates a capacitive change of approximately 770 pF. This change feeds into a charge-pump circuit that stores 320 pJ o...
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Veröffentlicht in: | Applied physics letters 2020-07, Vol.117 (3) |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | We present an integrated circuit capable of scavenging energy from repetitive changes in finger touch capacitance. A finger tapping on this application-specific integrated circuit generates a capacitive change of approximately 770 pF. This change feeds into a charge-pump circuit that stores 320 pJ of energy on a 1 nF storage capacitor. We present measurement results and simulations that demonstrate operation. As a proof-of-concept, we also demonstrate that the harvested energy can power a ring oscillator that outputs a series of chirps with frequencies ranging from 80 Hz to 30 kHz as the storage capacitor voltage charges and discharges. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/5.0014008 |