低压高驱动能力的CMOS电流反馈运算放大器  

Low-Voltage and High-Drive CMOS Current Feedback Operational Amplifier

作　　者：石慧杰[1] 王卫东[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《微电子学》2011年第3期323-326,共4页Microelectronics

基　　金：广西科学研究与技术开发计划项目资助(0731021)

摘　　要：基于0.18μm CMOS工艺,设计了一种具有低电压高驱动能力的电流反馈运算放大器。电路工作在1.8 V电源电压下,Spectre仿真的功耗为316μW,转换速率为112 V/μs,电流驱动能力达±1.5 mA。输入采用轨对轨结构,以提高输入电压摆幅;输出采用互补输出结构,使输出工作在甲乙类状态,以降低电路功耗。A current feedback operational amplifier（CFOA） with low-voltage and high driving capability was presented.The CFOA operated at 1.8 V supply voltage with a total power dissipation of 316 μW.The circuit was simulated with Spectre based on 0.18 μm CMOS technology.Simulation results showed that the proposed CFOA had a slew rate of 112 V/μs and it was capable of driving ±1.5 mA current.Rail-to-rail structure was used in the input stage to improve voltage swing capability,and the output stage worked in Class AB mode to reduce power dissipation.

关 键 词：电流反馈 运算放大器 CMOS 轨对轨输入级 

分 类 号：TN432[电子电信—微电子学与固体电子学]