基于FPGA的高精度正弦波信号源设计

DESIGN OF HIGH-ACCURACY SINE WAVE SIGNAL GENERATOR BASED ON FPGA

提出了一种基于FPGA的高精度正弦波信号源设计方案。该信号源采用直接数字合成的方式(DDS),以及使用FPGA、D/A芯片和滤波器等来实现。该设计的信号源输出频率范围为200 Hz-100 k Hz,幅值范围为0-5V。实验结果表明,该信号源相位、幅值、频率均可调,具有精度高、灵活性好等优点。

We propose a design of high-accuracy sine wave signal generator based on FPGA, which is completed by using direct digital synthesis（DDS）, the FPGA, D/A chip, filter and etc. The output frequency of the designed signal source ranges from 1 Hz to 100 k Hz and its amplitude ranges from 0V to 5 V. With its phase, amplitude and frequency adjustable, the signal source has the advantages of high accuracy and good flexibility.