一种高精度的电流反馈型带隙基准源的设计  

Design of a High Precision CMOS Bandgap Voltage Reference Circuit with Current Feedback

作　　者：李精文[1] 刘军[1] 蒋国平[1] 

机构地区：[1]大连理工大学,辽宁大连116023

出　　处：《现代电子技术》2008年第2期61-64,共4页Modern Electronics Technique

摘　　要：采用0．5μm，N阱CMOS工艺设计一种高精度带隙基准电压源，基准电压为1.245V，在0～70℃内温度系数仅为12．5ppm／℃，工作电压为2．8～8V，具有非常高的电源抑制比（PSRR），低频下高达107dB。此电路为电流反馈型基准源，能够产生自偏置电流，使电路建立稳定工作点。其结构能有效减小运算放大器的失调电压对基准输出的影响。This paper describes the design of a high precision bandgap reference, implemented in 0. 5μm n - well CMOS technology, The circuit generates a reference voltage of 1,245 V and has a temperature coefficient of 12.5 ppm/℃ between 0 and 70℃. It can operate with supply voltages between 2.8 V and 8 V, It has a PSRR of 107 dB under low frequency. This circuit works in a current feedback mode,and it generates its own reference current,resulting in a stable operation. The architecture designed in this circuit can efficiently reduce the offset voltage of operation amplifier.

关 键 词：带隙基准 PSRR 温度系数 反馈 

分 类 号：TN710[电子电信—电路与系统]