摘要
直接数字频率合成器DDS具有极高的分辨率、频率转换速度快、相位噪声低等优点。以ALTERA公司的CPU软核Nios为基础,利用QuartusⅡ软件和SopcBuilder,采用两级DDS和动态分频法,提高了信号源的精度。采用双口ROM可以很方便的同时输出两路具有一定相位差的信号,而且频率幅度可调。另外着重介绍了怎样用Matlab产生波形幅度数据以及最后的仿真验证。
Direct Digital Synthesizer（DDS） has the advantages of high frequency resolution, rapid frequency change rate and low phase noise. The paper is based on CPU soft nucleus Nios of Ahera Company, Quartus Ⅱ software and Sopc Builder. It introduces a method to develop a high precise signal source, that is the multi application of DDS and dynamic dividing of frequency. Based on the 2-port ROM ,can generate different phase signals, and realizes the frequency, amplitude can be adjusted. This paper introduces how to generate the wave amplitude data and how to simulate with MATLAB.
出处
《微计算机信息》
北大核心
2006年第05Z期190-192,共3页
Control & Automation
基金
国家自然科学基金:项目批准号:10376029
