Abstract
AbstractSupercapacitors are electrochemical devices that can store and restore electrical energy and are mostly used for powering dc or close‐to‐dc applications. As such they have not been explored enough for non‐dc circuits. In this study, we implement a band‐pass for frequency selectivity purposes and a relaxation oscillator for timing applications using a solid‐state carbon electric double‐layer capacitor. The expected behavior was observed for both circuits in the sub‐Hertz and tens of Hertz frequency ranges. This confirms the possibility of using the frequency‐dependent capacitive behavior of such devices in non‐conventional low frequency applications not related to dc energy storage but requiring large time constants.
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