基于FPGA的双通道幅频可调波形发生器

Dual channel amplitude frequency adjustable waveform generator based on FPGA

本文利用Altera公司的EP4CE10F17C8N芯片为控制核心,以AD9767芯片为双通道DA转换器,以UAF42为滤波电路,运用DDS原理,结合时钟倍频模块、按键消抖模块,以QuartusII为开发平台设计并实现了一个双通道幅频可调波形发生器。该波形发生器通过三个按键独立控制两个通道波形的切换和频率的调节,通过改变双通道DAC的后级运放电压放大倍数调节波形幅值。实验表明,该波形发生器输出信号失真度低、频率分辨率高,相比于传统信号发生器更具有应用价值。

Using ep4ce10f17c8n chip of Altera company as the control core,ad9767 chip as the dual channel DA converter,UAF42 as the filter circuit,using DDS principle,combined with clock frequency doubling module and key anti chattering module,and QuartusII as the development platform,this paper designs and implements a dual channel amplitude frequency adjustable waveform generator.The waveform generator independently controls the switching of two channel waveforms and the adjustment of frequency through three keys,and adjusts the waveform amplitude by changing the voltage magnification of the later stage operational amplifier of the dual channel DAC.Experiments show that the waveform generator has low output signal distortion and high frequency resolution.Compared with the traditional signal generator,it has more application value.