基于FPGA的多功能正弦信号发生器

Multi-functional Sine Signal Generator Based on FPGA Technology

系统以FPGA和单片机为核心,辅以必要的模拟电路,构成了一个基于DDS技术的正弦信号发生器.其主要模块有正弦波生成、频率控制、幅度控制、D/A转换和后级处理以实现AM、FM、ASK、PSK、FSK等功能.各模块均通过VH DL语言编程在FPGA上实现;后级处理采用低通滤波器和功率放大电路来提高波形质量和负载能力,最终得到所要求的多功能正弦信号发生器,在现代通信中具有良好的使用性.

This system based on FPGA, MCU and the essential simulated circuit, forms a signal generator of Sin wave based on DDS technology. The main module is made of the generator of sinusoidal wave, frequency control, range control, D/A convert and the functions such as AM, FM, ASK, PSK, FSK, etc.. Each module is realized by using VHDL; It raises wave qualities through low- pass filter and power amplifier. We get a required multifunctional sina signal generator finally, these functions have variable use in modern communication.