摘要
设计了一种工作于 0 .8V电源电压下与标准 CMOS工艺兼容的超低压运算放大器 ,对其电路结构和原理进行了分析。该放大器基于衬底驱动技术 ,采用衬底驱动 PMOS差分对作为输入级实现了 74d B的直流开环增益 ,66°的相位裕度 ,940μV的失调电压和 1 1 0～ 798m
An ultra low voltage operational amplifier is described which operates from 0.8 V supply and is compatible with standard CMOS technology. The structure and principles are analyzed. The Op-amp utilizes a PMOS bulk-driven differential pair to achieve 0.8 V operation while providing a dc open-loop gain of 74 dB, phase margin of 66° and the input offset voltage of 940 μV with 110^(798 mV) output voltage swing.
出处
《电子器件》
CAS
2004年第4期618-621,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目 ( 90 2 0 70 2 2 )资助
关键词
超低压
衬底驱动
运算放大器
CMOS
ultra-low voltage
bulk-driven
operational amplifier
CMOS
