基于AD9833的放大电路特性测试电路设计  

Design of Test Circuitfor Amplifier Circuit Characteristic Based on AD9833

作　　者：许莉 龚成莹 李沁蓉 王树德 温薪伟 高乐乐 XU Li;GONG Chengying;LI Qinrong;WANG Shude;WEN Xinwei;GAO Lele(School of Electronic Information Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China)

机构地区：[1]兰州工业学院电子信息工程学院,甘肃兰州730050

出　　处：《兰州工业学院学报》2023年第1期74-79,共6页Journal of Lanzhou Institute of Technology

基　　金：甘肃省高等学校创新创业教育改革项目(2020-22);甘肃省高等学校创新创业教育慕课(2019-4);兰州工业学院新工科研究与实践项目(2022-LGYXGK-03)。

摘　　要：针对三极管放大电路的基本特性,基于DDS芯片AD9833产生放大电路的输入信号,设计信号的控制测量和处理电路;利用STM32测量信号处理电路中采样电阻两端电压和三极管放大器的负载电压,进而计算输入阻抗、输出阻抗和增益;通过控制AD9833扫频测量幅频特性,实现了输入输出电阻、增益、频率和幅频特性曲线的动态显示和电路故障判断功能。测试结果表明,所设计的电路能够满足测量要求,具有一定的参考价值。Aiming at the basic characteristics of the triode amplifier circuit,based on the DDS chip AD9833 to generate the input signal of the amplifier circuit,a signal control acquisition and processing circuit is designed.STM32 is used to measure the voltage at both ends of the sampling resistor and the load voltage of the triode amplifier in the signal processing circuit,and then the input impedance,output impedance and gain are calculated.The dynamic display of input and output resistance,gain,frequency and amplitude-frequency characteristic curves and the function of circuit fault judgment are realized by controlling the amplitude-frequency characteristic of AD9833.The test results show that the designed circuit can meet the measurement requirements and has a certain reference value.

关 键 词：放大电路特性 AD9833 STM32 幅频特性 故障检测 

分 类 号：TN721[电子电信—电路与系统]