基于DDS的可编程的波形发生器  

Programmable waveform generator based on DDS

作　　者：刘洪利[1] 

机构地区：[1]上海电力学院计算机与信息工程学院,上海200090

出　　处：《国外电子测量技术》2008年第8期47-49,53,共4页Foreign Electronic Measurement Technology

摘　　要：本文主要介绍了基于DDS的波形发生器的硬件电路和工作原理。该波形发生器是由单片机控制其外围电路产生频率、幅度均可程控的正弦波、方波，频率输出范围为0-600kHz，分3个频段：0～2kHz，步进值为1Hz；2～50kHz，步进值为50Hz；50-600kHz，步进值为100Hz。峰-峰值为50v，步进值为0．2V。误差非常小，该方案设计合理，能满足实际要求。This paper mainly introduces the working principle and hardware circuit of the waveform generator, which is controlled by SCM, can produce programmable waveform （such as sin wave and squareness wave） in frequency and magnitude. The waveform generator can produce safe waveform from 0 to 600kHz. It is divided into three frequency sections：0-2kHz, step by 1Hz, 2-50kHz, step by 50Hz and 50-600kHz, step by 100Hz. The peak-to-peak value of waveform is 50 V, step by 0. 2 V, the error is very small. The result shows the design can completely satisfy the requirements.

关 键 词：单片机 波形发生器 直接数字频率合成 

分 类 号：TP216.2[自动化与计算机技术—检测技术与自动化装置]