由VB编写的信号发生器，利用电脑的音频输出接口输出信号，可输出正弦波、三角波、锯齿波、方波等。-Prepared by the VB signal generator, the use of the computer' s audio output jacks output signal, sine, triangle, sawtooth, square wave output.

基于DDS原理，利用VHDL语言进行正弦波、三角波、锯齿波、矩形波等波形的发生。包括完整代码和QUARTUS II工程。-Based on DDS principle, the use of VHDL, sine, triangle, sawtooth, square wave waveform occurs. Including the complete code and QUARTUS II project.