PROBLEM TO BE SOLVED: To provide an electrostimulator in which a power source can be shared between a booster circuit and a electromyograph system by making the booster circuit transless or noninsulated to make it compact and lightweight.
SOLUTION: The booster circuit 14 is noninsulated or transless. A capacitor is charged to 100V with photo-MOS relays SW5 and SW6 on in a period of not applying stimulation, a current is passed from an electrode E2 to E1 to excite the negative electrode E1, making photo-MOS relays SW5 and SW6 off, first remaining photo-MOS relays SW2 and SW3 off, and then making photo-MOS relays SW1 and SW4 on during a period of applying stimulation, then after making the photo-MOS relay SW1 and SW4 off, and making the photo-MOS relay SW2 and SW3 on, a current is passed from the electrode 1 to the electrode 2 to excite the negative electrode E2.
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