An object of the present invention is to improve the generating means of the sine wave AC input to the step-up transformer, to provide an alternating current potential treatment device that can efficiently biological applied AC output of high pressure. By the width modulation already high frequency pulse that has a pulse width modulation in the A phase is different from 180 ° 2 system of half-sine signal, switching control to the width modulation already high frequency a DC voltage of about 130 volts in the switching circuit of a full-bridge configuration as well obtain a pulse output, and by demodulating by the demodulation circuit 4 using the pulse output of two choke coils L1, L2 and two capacitors C1, C2 and two free Ho~iringu diodes D1, D2, current direction to obtain a demodulated half-sine output of the two systems to be alternately reversed every 180 ° phase, by supplying the respective half-sine alternately output to the primary coil of the step-up transformer t1, the high pressure secondary coil and through a positive voltage bleeder circuit 5 from t2, the peak value ratio of a positive voltage and a negative voltage is obtaining a biological the applied AC of 1: 3. .BACKGROUND【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し、高圧の生体印加交流出力を効率よく得る交流電位治療器を提供する。【解決手段】位相が180°異なる2系統の正弦半波信号でパルス幅変調した幅変調済高周波パルスにより、130ボルト程度の直流電圧をフルブリッジ構成のスイッチング回路でスイッチング制御して幅変調済高周波パルス出力を得ると共に、各パルス出力を2個のチョークコイルL1、L2と2個のコンデンサC1、C2および2個のフリー・ホィーリング・ダイオードD1、D2を用いた復調回路4により復調することで、電流方向が180°位相毎に交互に反転する2系統の復調済正弦半波出力を得て、各正弦半波出力を昇圧トランスt1の1次コイルに交互に供給することで、高圧2次コイルt2から正電圧ブリーダ回路5を介し、正電圧と負電圧との波高値比率が1対3の生体印加交流を得る。【選択図】図1
