| 全差分增益提高运算放大器的分析与设计 |
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| 引用本文： | 王晋, 仇玉林, 田泽,. 全差分增益提高运算放大器的分析与设计[J]. 电子器件, 2005, 28(2): 342-345 |
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| 作者姓名： | 王晋 仇玉林 田泽 |
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| 作者单位： | 中国科学院微电子研究所,北京,100029;西北大学电子科学系,西安,710069 |
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| 摘 要： | 通过增益提高技术，一个全差分增益提高套筒式共源共栅运算放大器被提出和设计。该运算放大器得主运算放大器是由全差分套筒式共源共栅放大器构成，并带有一个开关电容共模反馈电路。而增益提高放大器是由全差分析叠式共源共栅放大器构成，它的共模反馈电路是连续时间反馈电路。该运算放大器采用中芯国际0．35μmixed-signal CMOS工艺设计，运算放大器的直流增益可达到129dB，而单位增益频率为161MHz。
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| 关 键 词： | 全差分 增益提高 运算放大器 |
| 文章编号： | 1005-9490(2005)02-0342-04 |
Analysis and Design of Fully Differential Gain-Boosted Opamp |
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| WANG Jin,QIU Yu-lin,TIAN Ze. Analysis and Design of Fully Differential Gain-Boosted Opamp[J]. Journal of Electron Devices, 2005, 28(2): 342-345 |
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| Authors: | WANG Jin QIU Yu-lin TIAN Ze |
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| Affiliation: | 1.Institute of Microelectronic of Chinese Academy of Sciences; Beijing 100029; China; 2.Department of Electronic Science; Northwestern University; Xi an 710069; |
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| Abstract: | The g ain-boost ing techno logy is presented and analyzed. With gain-boosting, a ful ly dif ferent ialgain-bo osted telescopic cascode o pamp is pro posaled and designed. T he main opamp is a fully dif ferent ialtelescopic o pamp and has a sw itched capacitor CMFB circuit . T he boost ing o pamp is a fully different ial fo-lded casco de opamp and has a cont inuo us time CMFB circuit. The o pamp is desig ned in SMIC 0. 35 LmixedsignalCMOS pr ocess w ith 3. 3 V pow er supply and achieved a dc g ain of 129 dB w ith a 161 MHz unity g ainfrequency. |
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| Keywords: | fully differential gain-boosted opamp |
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