| 低电压高增益带宽CMOS折叠式共源共栅运算放大器设计 |
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| 引用本文： | 张蕾,王志功,孟桥.低电压高增益带宽CMOS折叠式共源共栅运算放大器设计[J].中国集成电路,2009,18(5):68-71,77. |
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| 作者姓名： | 张蕾 王志功 孟桥 |
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| 作者单位： | 东南大学射频与光电集成电路研究所暨射频集成电路与系统教育部工程研究中心,江苏,南京,210096 |
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| 摘 要： | 本文基于SIMC 0．18μm CMOS工艺模型参数，设计了一种低电压高单位增益带宽CMOS折叠式共源共栅运算放大器。该电路具有相对高的单位增益带宽，并具有开关电容共模反馈电路（CMFB）稳定性好、对运放频率特性影响小的优点，Hspice仿真结果表明，在1．8V电压下，运算放大器的直流开环增益为62．1dB，单位增益带宽达到920MHz。
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| 关 键 词： | 折叠共源共栅 运算放大器 开关电容共模反馈 CMOS工艺 |
Design of Low-Voltage and High Unity-Gain Bandwidth CMOS Folded Cascode Operational Amplifier |
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| ZHANG Lei,WANG Zhi-gong,MENG Qiao.Design of Low-Voltage and High Unity-Gain Bandwidth CMOS Folded Cascode Operational Amplifier[J].China Integrated Circuit,2009,18(5):68-71,77. |
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| Authors: | ZHANG Lei WANG Zhi-gong MENG Qiao |
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| Affiliation: | Institute of RF- & OE-ICs and RF IC&System Researching Center of the MOE;Southeast University;Nanjing China;210096 |
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| Abstract: | A low-voltage and a high unity-gain bandwidth CMOS folded-cascode operational amplifier is designed. It is designed in SIMC 0.18μ m CMOS process with 1.8 V power supply and uses switched-capacitor CMFB circuits to obtain the high unity-gain bandwidth. The frequency response shows that the DC open-loop gain is 62.1dB and the unity-gain bandwidth is 919 MHz. |
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| Keywords: | operational amplifier switched-capacitor CMFB CMOS process |
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