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: Two lines of high-frequency pulses, which have been independently pulse-width modulated by two lines of sinusoidal low-frequency half-wave signals of approximately 60 to 200 Hz, 180° out of phase with each other, are used to switching-control direct current voltages of approximately 130 volts to obtain two lines of width-modulated amplified pulse outputs. Each of the pulse outputs is then independently demodulated by means of two lines of demodulation circuits 4 including a choke coil L, a capacitor C, and a diode D to obtain two lines of demodulated sinusoidal half-wave outputs. The demodulated sinusoidal half-wave outputs are applied to a conduction control circuit 6 to invert the current direction for each half wave and then supplied to the primary coil of a step-up transformer. The resulting high-voltage sinusoidal alternating current generated at the secondary coil t2 of the transformer is passed through a positive voltage breeder circuit 7 to obtain an alternating current for application to a living body, which has a peak value ratio of positive 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程度で位相が互いに180°異なる2系統の正弦低周波半波信号で各別に幅変調した2系統の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2系統の幅変調済増幅パルス出力を得た後、これら各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を有する2系統の復調回路4で各別に復調した2系統の正弦半波出力を導通制御回路6により、電流方向を半波毎に反転させて昇圧トランスの1次コイルに交互に供給することで、トランス2次コイルt2に発生した高圧正弦波交流を正電圧ブリーダ回路7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
