基于AT89C52单片机的超低频信号发生器设计  

Design of Ultra-low Frequency Signal Generator Based on MCU AT89C52

作　　者：杨晶晶[1] 刘岩[1] 

机构地区：[1]第二炮兵工程学院,陕西西安710025

出　　处：《现代电子技术》2011年第4期29-31,共3页Modern Electronics Technique

摘　　要：设计以单片机AT89C52为核心的超低频信号发生器,详细介绍该信号发生器的工作原理、硬件电路、软件流程及技术关键。实际应用表明,该信号发生器可以产生频率、峰谷值可调的、连续的方波、三角波和正弦波,输出信号的频率范围为0.125 mHz(毫赫兹)~80 Hz,幅值为-10^+10 V。与传统信号发生器相比,具有输出波形稳定和低频精度高的特点,对于超低频信号发生器的设计具有重要的参考价值。An ultralow frequency signal generator based on MCU AT89C52 is designed. The working principle, hardware circuits, software design and key technology of the signal generator are described in detail. The experimental results show that this signal generator can create square wave, triangular wave and sine wave whose frequency and peak-to-valley values are adjustable. The frequency of output signal covers a bandwidth from 0. 125 mHz to 80 Hz, and the amplitude of out- put signal ranges from -10 V to -1-10 V. Compared with the traditional signal generator, the designed generator has advanta- ges such as stable output waveform, high accuracy and low frequency.

关 键 词：信号发生器 单片机 超低频信号 正弦波 三角波 方波 

分 类 号：TN911-34[电子电信—通信与信息系统] TP368.1[电子电信—信息与通信工程]