基于DDS技术的程控双通道正弦PWM脉冲源  

Programmable 2-channel Sine PWM Pulse Generator Based on DDS Technique

作　　者：周文利[1] 胡自洁[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《仪表技术与传感器》2009年第9期58-60,63,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(50675084)

摘　　要：提出了一种程控双通道正弦PWM脉冲信号源,介绍了系统的架构,重点论述了系统硬件和软件的设计方法和实现方案。以单片机ATmega16L为核心控制DDS芯片AD9850输出独立程控的2路正弦PWM脉冲信号。应用Lab-VIEW软件为平台,为信号源设计了程控界面,系统软件主要在计算机和单片机之间实现串行通讯,用户可方便地实现信号的频率、2路PWM脉冲的延迟时间、2路PWM脉冲占空比、波形选择的控制。通过Proteus和LabVIEW软件联调,对电路主要功能进行了仿真。该系统已在PCB上通过了实验验证。This paper presented a design of 2-channel sine PWM signal generator based on direct digital frequency synthesis （DDS） technique. The DDS chip AD9850 controlled by microprocessor ATmegal6L, can output two-channel separate sine pulses which were finally amplified by op-amp chip ADS17. With LabVIEW software platform, graphical user interface for signal source setting and temperature-measure was designed through serial port communication between computer and microprocessor. Therefore, the automatic control of the signal frequency, 2-channel PWM pulses parameters and the wave pattern was realized. Circuit simula- tion was conducted by Proteus software. The hardware were realized on Printed Circuit Board （PCB） with driving signal and tem- perature detection functioned

关 键 词：PWM DDS LabVIE 双通道正弦脉冲发生器 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]