基于FPGA的信号发生器的设计

Signal generator design based on FPGA

简要介绍了直接数字频率合成(DDS)的组成及其工作原理,给出了基于Altera公司的FPGA实现多波形信号发生器的设计过程和电路结构。设计在QuartusII软件中完成,并给出了仿真波形。该设计用FPGA实现,因此有许多优点。比如:在不修改硬件电路的情况下频率可调,波形可以选择正弦、三角等多种波形,且电路结构简单、扩展性好,具有频率范围宽、频率分辨率高、相位连续、切换速度快等优点。

Structure and principle of the DDS electric circuit is introduced. Based on DDS, the design process and electric circuit structure of muhiform waveform generator is discussed. The design and simulation is completed in the platform of Quartus II software and implemented with FPGA. This design features of muhiform waveform and adjustable frequency without any changes of hardware