1、D/A转换是把数字量转换成模拟量的变换，实验台上D/A电路输出的是模拟电压信号。要实现实验要求，比较简单的方法是产生三个波形的表格，然后通过查表来实现波形显示。

2、产生锯齿波和三角波-1, D/A converter is to convert the digital analog conversion, the experimental stage D/A circuit is an analog voltage output signal. To achieve the requirement of experiment, a relatively simple method is to generate three waveform table, and then look-up table to achieve the waveform display.

2, resulting in sawtooth wave and triangular wave