基于单片机的数字合成波形发生器

本文以AD公司的AD9857直接数字合成芯片为核心,设计了一种结构简便性能优良的数字合成波形发生器。文中主要对微机控制的任意波形发生器的软硬件设计进行了相应的研究,该数字合成波形发生器以INTEL公司的高性能单片机AT89C52作为控制器,利用了AD9857的DAC模式组成任意波产生的电路,在硬件电路的设计中使用可编程门阵列器件对一些特殊的电路进行了设计。该任意波形发生器不仅能产生正弦波,方波,三角波等常用的标准信号,还可根据用户的需要生成任意波形。

Digital waveform function generator based on MCU

This paper designs a brief structure and excellent performance waveform generator based on the Analog Device Company's DDS chip-AD985.It studies the software and hardware of arbitrary waveform generator controlled by the microcontroller.It takes the high performance microcontroller-AT89C52 as the controller,adopts DAC module of AD9857 to build arbitrary waveform.It designs some special circuits based on CPLD.It can produce standard waveform such as sine,square,triangle,and generate arbitrary waveform according to the user's demand,at the same time.