Design of Frequency Synthesizes Source Based on DDS Technology
Deng Zhong-yi · Yibiao jishu yu chuanganqi · 2005
It is a kind of important frequency synthetic technology that the direct figure is formatted(DDS),adopt the signal that this technology produces,the conversion speed of frequency is fast,the resolution ratio of frequency is high,frequency is steady degree is high,the phase varies in succession,the phase noise is low,the integrated easy,easy to control and the cost performance is low,etc.It can used in various kinds of to signal performance occasion that index expect much of frequency.This text has introduced the basic principle of high-performance DDS chip AD9858 and structure characteristic in detail,have described that utilizes this chip to make up the whole course of the frequency source as the key chip,including design principle, hardware circuit and main flow chart of software design.