基于FPGA的可调信号发生器

Adjustable signal generator based on FPGA

基于FPGA的应用技术,采用Altera公司DE2-70开发板的CycloneⅡ系列EP2C70作为核心器件,设计了一种基于FPGA的新型可调信号发生器。通过QuartusⅡ软件及Verilog HDL编程语言设计LPM_ROM模块定制数据ROM,并通过地址指针读取ROM中不同区域的数据,根据读取数据间隔的不同,实现调整频率功能,该系统可产生正弦波、方波、三角波和锯齿波4种波形信号,并使用嵌入式逻辑分析仪对产生的不同波形信号进行实时测试,实验证明,该可调信号发生器系统软件模拟数据和理论定制波形相吻合。

Based on FPGA application technology, using Ahera＇s DE2-70 development board, Cyclone II family EP2C70 as the core chip,a new type of adjustable signal generator based on FPGA was designed.Through the Quartns II and Verilog HDL designed LPM_ROM module which customizing data ROM,and through the address pointer to read data in different regions of ROM,according to the difference of reading data interval to achieve the function of frequency adjustment. The system produces sine wave,square wave,triangle wave,and saw tooth wave.Using SignalTap II real-time tested the different waveforms,experiments show that the system software analog data of the signal generator and the theory custom wave are consistent.