基于单片机的直接数字频率合成器的设计  

Design of Direct Digital Frequency Synthesizer Based on Single Chip

作　　者：丁小汀[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《现代电子技术》2007年第13期55-57,共3页Modern Electronics Technique

摘　　要：直接数字频率合成具有一系列优点,如频率切换速度快、频率分辨力高、频率和相位易于控制等。DDFS可以产生各种所需要的波形。根据直接数字频率合成的原理,利用80C51单片机、数/模转换器DAC0832以及一些外围电路设计了一种正弦波发生器。该系统电路设计简单、频率控制灵活,具有良好的实用性和可扩展性,不仅可用于正弦波的发生,还可根据存储器中存放的不同波形数据,输出其他波形。Direct digital frequency synthesis has a series of advantages, such as high speed of frequency switch, high frequency resolution,easy control of frequency and phase. DDFS could generate various waves. According to the principles of DDFS,a sine wave generator is designed based on SCM 80C51 ,DAC0832 and some supplementary circuits. The system is practical as a result of simple design of circuits, flexible control of frequency and its expansibility. Besides sine wave,it could also generate various waves according to different data in the memory.

关 键 词：直接数字频率合成 单片机 正弦信号 频率控制 

分 类 号：TN742.1[电子电信—电路与系统]