To underline the feasibility of the presented G-CAPode as a switchable capacitor (in analogy to a varactor), the device was utilized in a high-pass filter application. In a high-pass filter circuit, high alternating voltage frequencies can pass through (till the so-called cut-off frequency fC, voltage output (Vout) reaches 70.7% of Vin) while lower frequencies are attenuated because the reactance XC (imaginary part of impedance) of the capacitor is low at high frequencies, but high at low frequencies (Figure ). A high-pass filter can be built up by connecting a capacitor C and a resistor R in series (Figure ). fC is dependent on the capacitance and the used resistance according to Equation .