直接数字式合成技术之研究

直接数字式合成(DDS)技术,是近几年来发展迅速的一种频率合成新技术。DDS具有输出相对带宽宽、频率转换时间短、频率分辨力高且输出相位连续、可产生宽带正交信号,易集成等优点。在通信、雷达、遥控遥测、电子对抗、电子扩频以及现代化的仪器仪表工业等许多电子领域显示出广泛的应用前景。本文介绍了直接数字式合成技术的特点及其应用情况,阐述了DDS的基本原理并对其在应用中的一些合成方法做了相互对比。

The Research of Direct Digital Type Synthetic Technology

Direct Digital type Synthetic (DDS)technology as a kind of frequency synthetic new technology has developed in last few years. The output of DDS has wide relatively bandwidth, short frequency conversion time, high frequency resolulion capacity, continuous output phase, broadband orthogonality signal generation and DDS is integrated easily. It shows extensive application prospect in many electronic field such as communication, radar, remotely control, telemetering, electronic confrontation, electronic expand frequency and modernization instrument meter industry. This paper introduces the application condition and the characteristic of DDS and it also elaborates the basic principle of DDS and makes mutual contrast for its some synthetic methods in application.