基于FPGA的移相正弦信号发生器的设计

正弦信号发生器作为最基本的电子设备,广泛应用于航空航天控制、通信、电子测量、研究等等。本文介绍了基于FPGA技术,根据正弦信号移相原理,利用matlab/simlink/DSP Builder搭建移相正弦信号模型,采用直接数字频率合成技术(DDS),设计实现了一个频率、相位可控的正弦信号发生器。采用此方法设计的数控移相正弦信号发生器能够产生频率、相位均可数字式预置并可调节的正弦波信号,该数字移相信号发生器的频率、相位、幅度均可预置,分辨率高,精确可调,且可分别用作两路独立的信号发生器使用。采用这种方法设计可控移相信号发生器方便快捷,提高了开发效率,缩短研发周期,而且系统的调试方便,容易修改。

Design of phase-shifting sine signal generator based on FPGA

Sinusoidal signal generator as the basic electronic equipment, widely used in aerospace, control, communications, electronic measurement, research and so on. This paper introduces the FPGAbased technology, according to the principle of phase sinusoidal signal using matlab/simlink/DSP Builder build phase sinusoidal signal model, using direct digital frequency synthesis(DDS), designed to achieve a frequency, phase controllable sinusoidal signal generator. This method is designed using CNC phase sinusoidal signal generator capable of generating frequency, phase can be preset and adjustable digital sine wave signal, the digital phase shifting generator frequency, phase, amplitude can be preset to distinguish rate, precisely adjustable, and can be used separately two independent signal generator. This approach designed to facilitate generator controlled phase shifting fast, improve development efficiency and shorten the development cycle, and easy to debug the system, easy to modify.