一种基于AT89S52单片机的宽带直流放大器设计  

作　　者：李景银[1] 欧国峰[1] 

机构地区：[1]江苏自动化研究所

出　　处：《电子世界》2015年第19期195-197,共3页Electronics World

摘　　要：本设计以AT89S52单片机为控制核心,基于可调增益放大器AD8336,结合必要的前后级放大电路,实现了对小信号的无失真放大。该设计主要由信号处理模块、单片机控制模块、前后级处理模块、电源模块等构成。整个设计通频带为0~15MHz,增益范围为0d B^60d B且连续可调,最小输入电压有效值≤10m V,最大输出电压有效值≥10V,输出信号无失真。The system,which uses the microcontroller,AT89S52,as the core, and is based on the variable gain amplifier, AD8336,with the necessary preamp and post amp circuits,realizes the small signal＇s amplification without distortion. The system mainly consists of signal processing module, MCU control module,front and rear-level processing module,and power supply module.The system＇s bandwidth is 0 - 15MHz,the adjustable gain range is 0dB - 60dB, the minimum input voltage＇s RMS is smaller than 10mV, the maximum output voltage＇s RMS is larger than 10V,and the output signal is without significant.

关 键 词：微控制器 可调增益放大器 数模变换器 

分 类 号：TN866[电子电信—信息与通信工程]