基于AT89S52单片机的简易数字示波器设计  

Design of a Simple Digital Oscilloscope Based on AT89S52

作　　者：刘杨斌[1] 刘其峰[1] 华慧[1] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《现代电子技术》2011年第14期138-140,共3页Modern Electronics Technique

摘　　要：介绍一种双通道简易数字示波器的设计方案,以AT89S52单片机作为控制核心,输入信号在经过预处理电路处理后,通过高速A/D转换器ADC0809,实现信号的实时采样、数据处理、存储并在液晶上显示,并用键盘做功能设置。该设计创新地实现了波形的存储/回放、双通道信号实时对比分析、程控放大提高灵敏度等方面。测试结果表明该系统稳定,具有测量频率高、波形清晰、可靠性高、成本低等特点,有很高的实用价值。A design proposal of simple two-channel digital oscilloscope is introduced. Taking the AT89S52 micro- control- ler as the control, processing the input signal by preprocessing circuit, and via a high-speed A/D converter ADC0809 to realize the real-time signal sampling, data processing, storage and display on the LCD and set functions by using keyboard. The de- sign has been achieved a storage and re-display of waveform, comparison of dual-channel signal in real-time, and sensitivity improvement by program-controlled amplification. Test results show that the design of the system is stable, has high frequen- cy measurement, clear waveform, high reliability, low cost, and high practical value.

关 键 词：数字示波器 AT89S52 预处理电路 ADC0809 实时采样 

分 类 号：TN911-34[电子电信—通信与信息系统]