根据雷达光栅显示器的应用要求,提出一种基于FPGA的数字式正余弦函数产生器的解决方案。论述了如何用数字电路来实现正余弦函数计算的过程。方案不但可以用于雷达光栅扫描显示器的坐标变换器,而且适用于通讯领域等其它需要正余弦函数的波形产生器的场合。 According to the application requirement of radar grating display, a solution of digital sine cosine function generator based on FPGA is proposed. Discusses how to use the digital circuit to realize the process of calculating the cosine function. The scheme not only can be used for the coordinate converter of a radar raster scan display, but also is suitable for other applications such as the communication field which needs a sine wave generator.