一种新型电流镜运算跨导放大器的设计  

Design of a Novel Current-Mirror Operational Transconductance Amplifier

作　　者：赵媛 宋树祥[1] 刘振宇 岑明灿 蔡超波 蒋品群[1] ZHAO Yuan;SONG Shuxiang;LIU Zhenyu;CEN Mingcan;CAI Chaobo;JIANG Pinqun(College of Electronic Engineering,Guangxi Normal University,Guilin Guangxi 541004,China;Guangxi Technician College of Business,Wuzhou Guangxi 543100,China)

机构地区：[1]广西师范大学电子工程学院,广西桂林541004 [2]广西工商技师学院,广西梧州543000

出　　处：《广西师范大学学报（自然科学版）》2023年第2期67-75,共9页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金(62061005);广西研究生教育创新计划项目(YCSW2021070);广西高校中青年教师科研基础能力提升项目(2020KY02028)。

摘　　要：针对传统低压微功耗电流镜运算跨导放大器存在低增益和小摆率的缺陷,设计了一款新型电流镜运算跨导放大器。在不影响电路的静态功耗和稳定性的基础上,该运算跨导放大器采用增益提高(gain-boosting,GB)结构,增大了电路的小信号增益;引入开关型摆率增强(switched slew-rate enhancement,SSRE)结构,提高了电路的大信号摆率。基于UMC 0.11μm标准CMOS工艺进行电路设计和仿真。仿真结果表明:在1.2 V电源电压和10 pF负载电容下,与传统电流镜运算跨导放大器相比,设计的新型电流镜运算跨导放大器的增益提高了47 dB,正摆率提高了11.2倍,负摆率提高了12.4倍。A novel current-mirror operational transconductance amplifier was designed to overcome the disadvantages of low gain and small swing rate in traditional low-voltage micro-power current-mirror operational transconductance amplifier.Without affecting the static power consumption and stability of the circuit,the operational transconductance amplifier adopted gain boosting(GB)structure to increase the small signal gain of the circuit;the switched slow rate enhancement(SSRE)structure was introduced to improve the large signal swing rate of the circuit.The circuit was designed and simulated based on UMC 0.11μm standard CMOS process.The simulation results show that under 1.2 V power supply voltage and 10 pF load capacitance,and compared with the traditional current mirror operational transconductance amplifier,the gain of the new current mirror operational transconductance amplifier is increased by 47 dB,the positive slew rate is increased by 11.2 times and the negative slew rate is increased by 12.4 times.

关 键 词：增益提高 摆率增强 低功耗 低电压 电流镜 运算跨导放大器 

分 类 号：TN722.77[电子电信—电路与系统]