实用信号源的设计 论文编号:JD928 论文字数:9667,页数:29 摘要 信号源是现代电子设备特别是测试设备的必备部分,其产生各种基准信号给被测设备,用来分析和研究被测设备的性能状况,被广泛应用于航空航天设备的电子测试、通信技术、医学成像、测量和科研等各个领域中,而且数字化、软件化是测试设备的发展趋势。 根据不同系统对于信号的不同需求,人们总希望信号源输出的波形信号幅值、频率可调,且频率准确、稳定,甚至在一些情况下还要求信号源能够输出具有确定相位关系的波形信号,因此传统的模拟信号源已远远不能满足现代应用的要求。而直接应用数字合成技术产生的全数字化的信号源,为解决上述问题提供了可行方案。 关键词: 信号源; 数字信号频率合成技术(DDS);AD9850 Abstract Signal Source is modern electronic equipment, especially particularly essential part of the test equipment. It is produced benchmarks signal to the tested equipment, to analyze and study the performance of the tested equipment status, is widely used in aerospace electronic test equipment, measurement and scientific research in various fields, and digital, the software is the development trend of test equipment. According to different systems for the different needs of signal, people hope signal output signals amplitude, frequency tunable, frequency accuracy and stability, even in some cases also request Signal Source output phase is to determine the relationship between multi-channel signals, so the traditional analog signal source has been far from meeting the requirements of modern applications. Direct Digital Synthesis and application of the technology of the all-digital signal source, in order to solve the above problems provide a viable programme. Key words: Signal Source; Direct Digital Frequency Synthesis; AD9850 目录 摘要I Abstract II 第1章 绪 论 1 课题背景 1 相关任务 1 研究内容 2 第二章 方案的论证 4 系统结构的总框图 4 方案的比较及器件的选择 4 以上回答来自: