PROBLEM TO BE SOLVED: To suppress variation in a peak value ratio between positive voltage and negative voltage of biological application alternating current accompanying change of arranged location of a conductive mat or a use form.SOLUTION: Between a high voltage end P1 of a secondary coil L2 and a grounding end P2 of the ground electric potential of an AC step-up transformer T, a first voltage division circuit B1 obtained by serially connecting a parallel circuit composed of a resistor R1 and a diode D1 facing the high voltage end with a protection and voltage division resistor Ro and a second voltage division circuit B2 obtained by serially connecting a diode D2 facing the grounding end with a resistor R2 are connected in series. Thereby, high voltage alternating current having a peak value ratio between positive voltage and negative voltage of approximately 1:3 is obtained from a voltage division output end b between the voltage division circuits B1 and B2 and is capable of being supplied to a conductive mat m as biological application alternating current.COPYRIGHT: (C)2016,JPO&INPIT【課題】 導電マットの配置場所や、使用形態の変動に伴う生体印加交流の正電圧と負電圧との波高値比率の変動を抑制すること。【解決手段】 交流昇圧トランスTにおける2次コイルL2の高圧端P1と大地電位の接地端P2との間に、前記高圧端に向けたダイオードD1と抵抗R1との並列回路に保護兼用分圧抵抗Ro を直列接続した第1分圧回路B1と、前記接地端に向けたダイオードD2に抵抗R2を直列接続した第2分圧回路B2とを直列に接続することで、各分圧回路B1・B2間における分圧出力端bから、正電圧と負電圧との波高値比率がほぼ1対3の高圧交流を得ると共に、この高圧交流を前記導電マットmに生体印加交流として給電可能に構成した。【選択図】図1
