Disclosed it is possible to improve the generating means of the sine wave alternating current to be input to the step-up transformer and provides alternating potential therapy apparatus for efficiently obtaining a biological application AC output of the high voltage. A phase and width modulation already high frequency pulse by 180 ° different 60Hz~200Hz about half-sine signal each other, by its synchronization on signal, is connected between the ground and DC power supply of about 135 volts, a full-bridge configuration The switching circuit 4 is switched control, as well as the phase gains width modulated been amplified pulse output of the 180 ° two different strains from each other, reversing the current direction which is obtained by demodulating the respective pulses output by the demodulation circuit 5 for each half-wave The dual demodulated half-sine output that supplies alternately to the step-up transformer primary coil t1, the high-pressure sine wave alternating current generated in the secondary coil t2 with a positive voltage bleeder circuit, a positive voltage and a negative voltage peak value ratio of was the 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することで、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】位相が互いに180°異なる60Hz~200Hz程度の正弦半波信号による幅変調済高周波パルスと、その同期オン信号とにより、135ボルト程度の直流電源と接地間に接続した、フルブリッジ構成のスイッチング回路4をスイッチング制御し、位相が互いに180°異なる2系統の幅変調済増幅パルス出力を得ると共に、これら各パルス出力を復調回路5で復調して得られる電流方向が半波毎に反転する2系統の復調済正弦半波出力を昇圧トランスの1次コイルt1に交互に供給し、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を用いて、正電圧と負電圧との波高値比率が1対3の生体印加交流とした。【選択図】図1
