CAJ | 학술논문

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0dB～60dB且连续可调，最小输入电压有效值≤10mV,最大输出电压有效值≥10V，输出信号无失真。
본설계이AT89S52단편궤위공제핵심，기우가조증익방대기AD8336，결합필요적전후급방대전로，실현료대소신호적무실진방대。해설계주요유신호처리모괴、단편궤공제모괴、전후급처리모괴、전원모괴등구성。정개설계통빈대위0～15MHz，증익범위위0dB～60dB차련속가조，최소수입전압유효치≤10mV,최대수출전압유효치≥10V，수출신호무실진。
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.