PROBLEM TO BE SOLVED: To provide a living body application AC of high voltage from a secondary side by inputting sine half waves in two systems in which phases differ from each other by 180° into two primary coils of a step-up transformer, in forward or reverse manner alternately.SOLUTION: Using width modulated high frequency pulses in two systems having been width-modulated for high frequency pulses with sine half wave signals in two systems of different phases from each other by 180°, switching control is performed with a DC voltage sufficiently higher than the half-wave signals, to provide width modulated amplification pulse outputs in two systems. After that, each of these pulse outputs is separately demodulated through a parallel circuit containing a choke coil and a diode and a demodulation circuits in two systems containing a capacitor, to provide a sine half wave demodulated outputs in two systems of phases different from each other by 180°. These demodulated outputs are supplied to twp primary coils of a step-up transformer in forward/reverse manner alternately, so that a high voltage sine wave AC generated at the secondary coil becomes a living body application AC of which a wave hight value ratio between positive voltage and negative voltage is 1:3 by a positive voltage bleeder circuit.COPYRIGHT: (C)2014,JPO&INPIT【課題】 位相が互いに180°異なる2系統の正弦半波出力を昇圧トランスにおける二つの1次コイルに交互正逆に入力することで、その2次側から高圧の生体印加交流を得ること。【解決手段】 位相が互いに180°異なる2系統の正弦半波信号で、高周波パルスを幅変調した2系統の幅変調済高周波パルスにより、前記半波信号よりも充分高い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とダイオードとの並列回路およびコンデンサからなる2系統の復調回路を経て各別に復調し、位相が互いに180°異なる2系統の正弦半波復調済出力を得ると共に、これら各復調済出力を昇圧トランスにおける二つの1次コイルに交互正逆に供給することで、2次コイルに発生した高圧正弦波交流を正電圧ブリーダ回路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た。【選択図】図1
