PROBLEM TO BE SOLVED: To efficiently obtain a high-voltage alternating current output for application to a living body by improving means for generating sinusoidal wave alternating current to be input to a step-up transformer.SOLUTION: A direct current voltage of approximately 130 volts is switching-controlled by high-frequency pulses width-modulated by sinusoidal low-frequency half-wave signals of approximately 60 to 200 Hz to obtain width-modulated high-frequency pulse outputs. The pulse outputs are demodulated by means of a demodulation circuit using a choke coil L, a capacitor C, and a diode D to obtain demodulated sinusoidal whole-wave outputs, which are then applied to a conduction control circuit to generate two lines of sinusoidal half-wave outputs in which the current direction alternately inverts for each half wave of the whole-wave outputs. Each of the half-wave outputs is alternately supplied to a primary coil L1 of a step-up transformer T, and the resultant high-voltage sinusoidal alternating current generated at a secondary coil L2 of the transformer is converted by a positive voltage breeder circuit 6 into an alternating current for application to a living body, which has a peak value ratio of positive voltage to negative voltage of 1 to 3.COPYRIGHT: (C)2015,JPO&INPIT【課題】 昇圧トランスに入力する正弦波交流の発生手段を改良することで、高圧の生体印加交流出力を効率よく得ること。【解決手段】 60~200Hz程度の正弦低周波全波信号で幅変調した高周波パルスにより、130ボルト程度の直流電圧をスイッチング制御して幅変調済高周波パルス出力を得た後、このパルス出力をチョークコイルLとコンデンサCおよびダイオードDを用いた復調回路で復調して得た復調済正弦全波出力を、導通制御回路を介して前記出力の半波毎に電流方向が反転する2系統の正弦半波出力となした後、これら各半波出力を昇圧トランスTの1次コイルL1に交互に供給することで、トランス2次コイルL2に発生した高圧正弦波交流を正電圧ブリーダ回路6により、正電圧と負電圧との波高値比率が1対3の生体印加交流となし得た。【選択図】図1
