【摘要】 以单片机为核心,设计了一个超低频任意函数信号发生器。该信号发生器采用数字波形合成技术,通过硬件电路和软件程序相结合,可输出自定义波形,如正弦波、三角波、方波和锯齿波及其他任意波形,且超低频的功能突出。详细介绍了任意波形的生成原理、硬件电路设计以及软件系统部分的设计原理。波形的频率和幅值在一定范围内可任意改变。与传统信号发生器只有固定的几种输出波形相比,具有输出波形的任意化和低频精度高的特点。更多还原

【Abstract】 A signal generator carrying the ultra low frequency with the function of arbitrary value was designed,centering on the application of single-chip.The multiple techniques of digit wave form was adopted.Via the hardware circuit and software program,the signal generator could output the waveform which was user-defined,such as sine,triangle,square,saw-tooth shape,etc.The function of the lower frequency was extremely superior.The principle of the wave generation,hardware circuit and software design was presented.The frequency and amplitude value of the waveform can be changed discretionarily.Compared with other normal signal generator,its advantage is the user-defined output wave and the high accuracy of low frequency.更多还原