一种全共模范围低失调运算放大器电路设计  

A circuit of low offset voltage operational amplifier within the full common model range

作　　者：刘欢 LIU Huan(Chengdu Huanyuxin technology CO.,LTD)

机构地区：[1]成都环宇芯科技有限公司

出　　处：《中国集成电路》2023年第10期52-56,82,共6页China lntegrated Circuit

摘　　要：基于CMOS工艺设计了一种全共模范围内低失调的运算放大器。本电路优化了传统轨到轨输入输出运放的系统误差,并设计了高精度的电流转换结构和全共模范围失调电压修调结构,提高了运放的精度和全输入共模范围内运放的线性度。经实测验证,本电路全共模范围内失调电压可修调至±50uV以内。Based on CMOS process,a low offset voltage operational amplifier within the full common model range was designed.This circuit optimizes the systematic error of the traditional rail-to-rail input/output op-amp,and designs a high-precision current conversion structure and a full-common-model girth offset voltage correction structure,which improves the accuracy of the op-amp and linearity of the op-amp within the full common model range.It is proved that the offset voltage of this circuit can be corrected to±50uV within the full common model range.

关 键 词：轨到轨输入输出 失调电压修调 高精密运放 

分 类 号：TN402[电子电信—微电子学与固体电子学]