(基于MSP430单片机和DDS技术的频率特性测试仪的设计.PDF

34 5 电 子 器 件 Vol． 34 No． 5 第 卷 第 期 20 11 10 Chinese Journal of Electron Devices Oct． 20 11 年 月 Design of Frequency Characteristic Tester Based on MSP430 and DDS LI U Yanyun1* ，ZH U Lei2 1． Dep artment of Mechanical and Electrical Engineering ，Changzhou Textile Garment Institute ，Changzhou Jiangsu 213164 ，China ; ( 2． School of Electrical and Inf ormation Engineering ，Jiangsu Teachers University of Technology ，Changzhou Jiangsu 21300 1，China ) Abstract :To overcome the deficiencies of that the traditional analog frequency characteristic tester is expensive ，in- convenient to operate and its performance index is susceptible to temperature drift ，a simple frequency characteristic tester is designed with the combination of DDS and MSP430 MCU by using digital technology． The system has friendly human-machine interface with modular design concept ，and the initial frequency and step value of frequency sweeping can be set by keyboard． The system with bandwidth of 10 MHz can meet the requirements of the teaching experiment applications for the courses of electronic technology and electronic measurement etc． in the universities and other institutions． Key words :frequency characteristic tester ;DDS ;MSP430 ;D / A converter EEACC :7210 ;7310G doi :10． 3969 /j ． issn． 1005 －9490． 2011． 05． 010 基于MSP430 单片机和DDS 技术的频率特性测试仪的设计 1* 2 ， 刘艳云 朱 雷 1． ， 213164 ; ( 常州纺织服装职业技术学院机电工程系 江苏常州 ) 2 ． ， 213001 江苏技术师范学院电气信息工程学院 江苏常州 摘 要: 、