| 摘要: |
| 直接数字合成 (DDS)是一种重要的频率合成技术 ,具有分辨率高、频率变换快等优点 ,在雷达及通信等领域有着广泛的应用前景。文中介绍了一种高性能DDS芯片AD985 0的基本原理和工作特点 ,阐述了如何利用此芯片设计一种频率在 0～ 5 0kHz内变化、相位正交的信号源 ,给出了AD985 0芯片和MCS5 1单片机的硬件接口和软件流程 |
| 关键词: 直接数字频率合成,信号源,AD9850芯片,设计 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:October 13, 2002 |
| 基金项目: |
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| A Signal Generator Based on AD9850 |
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| Abstract: |
| An important frequency synthesis technology with such advantages as high frequency resolution and fast frequency conversion,DDS has found wide application in radar and communication field.In this paper,the principle and features of AD9850 are introduced.How to design a signal generator with quadrature phase and frequency variation between 0 and 50 kHz is presented.The hardware interface and software flowchart of AD9850 and MCS51 one-chip computer are given. |
| Key words: DDS,Signal generator,AD9850,Design |
