REACTANCE ADJUSTMENT DEVICE, TRANSCEIVER AND TRANSMISSION DEVICE USING THE SAME, SIGNAL PROCESSING CIRCUIT SUITABLE FOR THEM, REACTANCE ADJUSTMENT METHOD, TRANSMISSION METHOD, AND RECEPTION METHOD

摘要

an electrode (123) for inducing an electric field in an electric field transmission medium (121); a resonator (7) for adjusting the reactance value; and adjustment signal generator (13) for alternately outputting a high-level signal and a low-level signal to the resonator (7); an electric field detector (15) for generating an electric signal based on the electric field in the electric field transmission medium (121); first electric charge accumulation means (C1) for accumulating electric charge in accordance with the electric signal when the adjustment signal generator (13) outputs a high-level signal; second electric charge accumulation means (C2) for accumulating electric charge in accordance with the electric signal when the adjustment signal generator (13) outputs a low-level signal; a voltage comparator (10) for outputting a predetermined signal in accordance with the voltage difference; and a control unit (19) for outputting to the resonator (7), voltage of a constant voltage value while electric charge is accumulated in the first or the second electric charge accumulation means (C1, C2) and voltage based on a predetermined signal when the electric charge accumulation is complete.