用555芯片产生并输出等间隔连续脉冲、断续波脉冲、幅度调制脉冲三种波形发生电路以及电压和电流输出电路，通过通过单片机控制选择不同的治疗刺激脉冲序列的输出、控制治疗时间-555 chip generates and outputs interval continuous pulse the intermittent wave pulse, amplitude modulated pulse the three waveform generation circuit and the voltage