嵌入式系统中波形发生器的设计与实现

Design and Implementation of Waveform Generator in Embedded System

介绍了在嵌入式系统实现周期可调的波形发生器的多种设计方案,提出由单片函数发生器、专用集成电路、应用硬件描述语言、直接数字频率合成技术等来设计波形发生器。实现了各个模块协同工作的硬件电路、软件调试、输出仿真等。结果显示,任意波形发生器能很好地产生正弦波、三角波、方波以及编辑生成上述三种波形(同周期)的任意波形的线性组合波形,并实现不同的幅度、频率可调。

Several design strategies of the cycle adjustable waveform generator in embedded system are introduced. It is proposed that the waveform generator is designed by composing the technologies of single chip function generator, dedicated IC, application hardware description language, and DDS for implementing coordinated operation between various modules, software debugging, and output simulation. The result shows that the arbitrary waveform generator is able to generate sine wave, triangle wave, and square wave with adjustable frequency and amplitude ; as well as any linear composition of these three waveforms （ with the same cycle ） by editing.