The principle and circuit diagram explanation of the electronic frostbite treatment instrument: the special integrated circuit SL9711 of the electronic frostbite treatment instrument constitutes an oscillating circuit, a power amplification circuit and a controller, which generates sine waves of 100Hz and 3Hz, and the potentiometer is adjusted by the potentiometer after the transformer is boosted. Current. Because a diode is added to the output, the current waveform flowing through the human body is a pulsating current. When acting on the human body, motor nerves are stimulated to cause muscle tremor. After a few seconds, the sensation of numbness disappears, and the sensory and motor nerves begin to enter a state of inhibition. The pain threshold rises and exhibits an analgesic effect. Due to the pulsating current suppresses the AC nerve and causes the protein through which the current passes to undergo a slight degeneration and decomposition, it becomes a vasoactive peptide, etc. The substance, therefore, after the pulsating current stops, there is still a role in improving local blood circulation and late pain relief. As shown in the following figure: 
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