摘要
基于C8051F020单片机设计的运算放大器闭环参数测试系统,采用辅助运放测试方法,可对运放的输入失调电压、输入失调电流、交流差模开环电压增益和交流共模抑制比以及单位增益带宽进行测量。系统利用DDS芯片AD9851实现了5HZ信号的输出和40kHz～4MHz扫频输出,具有自动量程转换、自动测量功能和良好的人机交互性。
C8051F020 microcontroller based closed-loop operational amplifier design parameters of test systems,test methods using auxiliary op amp,can the op amp input offset voltage,input offset current,differential-mode exchange and sharing of open-loop voltage gain of common-mode rejection ratio and the unity gain bandwidth Measuring system uses DDS chip AD9851 achieve 5HZ signal output and 40kHz～4MH.
出处
《湖南农机（学术版）》
2010年第3期33-34,71,共3页
Hunnan Agricultural Machinery
