基于STC89C52的低频信号发生器设计  

Low frequency signal generatordesign Based on STC89C52

作　　者：柴西林[1] 刘远聪[1] 车玮[1] 

机构地区：[1]西北师范大学知行学院,甘肃兰州730070

出　　处：《自动化与仪器仪表》2016年第3期11-12,14,共3页Automation & Instrumentation

摘　　要：以STC89C52单片机作为主控芯片,在单片机的输出端口接DAC0832进行D/A转换,再通过运放电路进行波形的调整。波形频率的增减以及波形的选择可通过按键控制,并且频率大小在LCD上实时显示,最后外接示波器显示输出波形。可产生三角波、方波、正弦波等多种特殊波形,波形的频率可以由程序控制。本设计克服了传统函数信号发生器的缺点,针对目前低频段的信号发生器比较少的现状,具有电路简单、结构紧凑、成本低、性能好等优点。In this design, STC89C52 microcontroller is the main control chip.The output port of the single chip is connected to DAC0832 for D/A conversion,then the waveform is adjusted by the the circuit of operational amplifier.Thewave frequency fluctuation as well as waveform selection is controlled by the button,and the frequency is displayed by LCD.Finally,the output waveform is displayed on the oscilloscope.It can produce a variety of waveforms,such as triangular wave,rectangular wave,sine wave,etc..It can be programmed to change the waveform of frequency.This design overcomes the shortcomings of the traditional function of the signal generator,according to the current situation of low frequency signal generator is relatively small, with a simple circuit, compact structure, low cost, superior performance etc.

关 键 词：低频信号发生器 STC89C52 波形 

分 类 号：TM935[电气工程—电力电子与电力传动]