【摘要】 直接数字频率合成(DDS)技术是近年来迅速发展起来的新的频率合成方法,在很多领域得到了广泛应用。根据DDS原理及应用现状,介绍了DDS芯片AD9854与可编程门阵列(FPGA)相结合,设计开发了一种信号发生器,该系统具有灵活可变、可由用户控制的特点,用户可通过选择不同控制模块得到各种不同的线形调频(LFM)信号。更多还原

【Abstract】 Direct Digital Synthesis(DDS) is a new way to synthesize frequency which is developing quickly these years,and is used in many fields.In this paper,Based on the principle and application of DDS,DDS chip AD9854 is combined with FPGA to develop a kind of signal generator.This kind of signal generator is flexible and controllable,then the user can get several Linear Frequency Module(LFM)signals as needed through choosing different control modules.更多还原