摘要
可变增益放大器中,运放的两输入电阻无法在每一种增益中都保持一致而产生失调电压,本文给出了“直流伺服”消除失调电压的方法,对其作了理论分析和实验验证。
In a variable gain amplifier, offset voltage is produced due to the resistors of the dual inputs can't always trim at every gain-stage. A DC servo method is given to eliminate the offset voltage in this paper. It is analyzed in theories and verified by experiments.
出处
《系统工程与电子技术》
EI
CSCD
1997年第6期59-61,共3页
Systems Engineering and Electronics
关键词
放大器
增益放大器
失调电压
Variable gain, Offset voltage elimination.
