To evaluate the final filtering characteristics, the corresponding output voltage (maximal amplitude) of the designed LC circuit in series was monitored (Figure ). For both applied gate Ubias, a typical band-pass filtering characteristic can be observed in which high and low frequencies are attenuated, while frequencies from the middle-frequency region can pass through. However, due to the capacitance switchability of the G-CAPode, the filtering behavior clearly differs. The frequencies at which the maximal output voltage can be achieved match the values of the resonance frequencies mentioned above (91 Hz for +1 V Ubias and 71 Hz for -1 V Ubias). Due to the different impedance values (Figure ) at fR also the output voltage values of 1 or -1 V gate Ubias clearly differ (54 mV for the 1 V Ubias, 28 mV for the -1 V Ubias).