基于 DDS的数字式频率特性测试仪的仿真研究

摘要

Using Multisim simulation software to test a digital tester for frequency response characteristic de -signed by the author .The simulation tests include amplitude-frequency characteristics , phase-frequency character-istics and their comparison results .The causes of error are analyzed on the basis of comparing the amplitude -fre-quency characteristics and phase-frequency characteristics;strategies for future improvement of the hardware circuit are also discussed .%利用Multisim仿真软件对自行设计的一款数字式频率特性测试仪进行仿真测试。仿真测试的内容包括幅频特性、相频特性，并根据幅频特性和相频特性的比对结果分析产生误差的原因，在此基础上提出了后期如何对硬件电路进行改进的策略。