摘要
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 describes a microcontroller-based phase-shiftable ultra-low frequency signal generator. Using advanced technology of digital-synthesized waveform, this system provides excellent frequency and level control, and wide analog modulation capabilities. Its output frequency range is 0. 0001 to 999. 9Hz, and its output amplitude range is 0 to 20V(P-P). It can output sine wave, triangle wave, sawtooth wave, quadrate wave and other periodic functions. The phase difference between its two outputs can be modulated from 0° to 359°.
出处
《仪表技术》
2000年第1期9-11,共3页
Instrumentation Technology
关键词
信号发生器
数字合成波形
超低频信号
Signal generator Digital-synthesized waveform Ultra-low frequency signal
