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介绍一种基于微控制器的超低频移相信号发生器的工作原理和设计方法。系统 采用了微控制器和数字波形合成技术，具有数字控制输出信号的频率、幅值、波形和信号之 间的相位差等功能。该信号发生器输出信号的频率范围为０．０００１～９９９．９Ｈｚ，幅值的峰－峰 值为０～２０Ｖ可调，波形可以从正弦、三角、锯齿、方波或其他周期函数信号中选择，输出的 两路信号之间可以实现０°～３５９°的相位差。实际应用表明，该信号发生器具有稳定性好和 调节精度高等特点，具有广泛的应用前景。
This paper introduces a working principle and design method of a micro-controller based ultra-low frequency phase shift signal generator. System uses a microcontroller and digital waveform synthesis technology, with digital control of the output signal frequency, amplitude, waveform and phase difference between signals and other functions. The signal generator output frequency range of 0.0001 ~ 999.9Hz, amplitude peak - peak 0 ~ 20V adjustable, the waveform can be selected from sine, triangle, sawtooth, square wave or other periodic function signals, Output of the two signals can be achieved between 0 ° ~ 359 ° phase difference. Practical application shows that the signal generator has the advantages of good stability and high regulation accuracy, and has a wide range of application prospects.