一种用于开关电容积分器的高增益CMOS运算放大器
Fully Differential Operational Transconductance Amplifier applied in SC integrated circuit
设计了一种用于开关电容积分器中的CM0S运算跨导两级放大器。第一级运放采用一个P管输入的折叠式共源共栅结构，第二级采用单管共源结构，两级之间采用共源共栅电容密勒电容进行频率补偿。全差分运放CMFB采用了开关电容共模反馈电路，稳定性好。电路采用0.35 混合信号CM0S工艺设计，5V电压供电，仿真结果表明，运算放大器的开环直流增益为82dB，单位增益带宽126MHz。
two-stage fully differential CMOS operational transconductance amplifier applied in SC integrator is designed．The first stage op amp is a folded—cascode op amp with a pair of PMOS inputs，and the second stage op amp is common source amp．And the two stages are compensated with cascode Miller capacity and employs SC-CMFB circuit to achieve good stability ．The OTA is designed in 0.35 mixed—signal CMOS technology with 5V power supply．The simulation results show that the DC open-loop gain is 82dB and the unity—gain band width is 126 MHz ．
唐广、李坤
微电子学、集成电路电子电路
跨导运算放大器共源共栅密勒电容补偿全差动开关电容共模反馈
OTAcascode Miller compensationfully differentialswitched-capacitor CMFB
唐广,李坤.一种用于开关电容积分器的高增益CMOS运算放大器[EB/OL].(2009-02-25)[2025-08-03].http://www.paper.edu.cn/releasepaper/content/200902-1339.点此复制
评论