电针治疗仪多通道幅频调制输出技术改进设计

目的：针对电针治疗仪波形产生和输出电路复杂的情况进行改进设计。方法：基于直接数字合成思路．由单片微处理器和D/A转换芯片结合软件编程实现多种治疗波形的数字合成和多通道幅频可调的双极性信号．经功率放大和脉冲变压器隔离后输出。结果：四通道双极性可实现多种治疗波形输出，幅频可调。结论：改进后的电针治疗仪功能调整灵活，电路简单，功耗低，可靠性高。

Improvement on Output Technology of Multi-channel Amplitude and Frequency Modulation for Electro-acupuncture Instrument

Objective To improve the design for electro-acupuncture-waveform generator considering the complexity of the output circuit.Methods Based on the direct digital synthesis principle,combining the technology of single-chip microprocessor and D/A converter chip with a variety of software programming to obtain the digital waveform synthesis and multi-channel amplitude and frequency adjustable for the bipolar output signal,the output signal was obtained by power amplifier and pulse transformer isolation.Results The amplitude and frequency of four-channels bipolar output with a variety of waveform might be adjusted.Conclusion The electro-acupuncture is flexible-to-adjust,easy-to-operate,low-power-consumption and reliable.