本文介绍了一种基于89C51单片机和数模转换器DAC0832产生所需波形的波形发生器设计方案，此发生器能产生频率可调的正弦波、三角波和方波三种波形。(In this paper, a waveform generator based on 89C51 single chip computer and DAC0832 digital-to-analog converter is introduced. The waveform generator can generate three kinds of waveforms: sine wave, triangle wave and square wave with adjustable frequency.)