| 低功耗轨至轨CMOS运算放大器设计 |
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| 引用本文： | 刘华珠,黄海云,宋瑞.低功耗轨至轨CMOS运算放大器设计[J].半导体技术,2011,36(6):463-465,482. |
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| 作者姓名： | 刘华珠 黄海云 宋瑞 |
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| 作者单位： | 东莞理工学院电子工程学院,广东东莞,523808;杭州电子科技大学新型电子器件研究所,杭州,310018 |
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| 基金项目： | 东莞市高等院校科研机构科技计划重点项目(200910814002) |
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| 摘 要： | 设计了一个1.5 V低功耗轨至轨CMOS运算放大器。电路设计中为了使输入共模电压范围达到轨至轨性能,采用了NMOS管和PMOS管并联的互补差动对输入结构,并采用成比例的电流镜技术实现了输入级跨导的恒定。在中间增益级设计中,采用了适合在低压工作的低压宽摆幅共源共栅结构;在输出级设计时,为了提高效率,采用了简单的推挽共源级放大器作为输出级,使得输出电压摆幅基本上达到了轨至轨。当接100 pF电容负载和1 kΩ电阻负载时,运放的静态功耗只有290μW,直流开环增益约为76 dB,相位裕度约为69°,单位增益带宽约为1 MHz。
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| 关 键 词： | 低功耗 轨至轨 互补型金属氧化物半导体 运算放大器 恒跨导 |
Design of Rail-to-Rail CMOS Low-Power Operational Amplifier |
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| Liu Huazhu,Huang Haiyun,Song Rui.Design of Rail-to-Rail CMOS Low-Power Operational Amplifier[J].Semiconductor Technology,2011,36(6):463-465,482. |
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| Authors: | Liu Huazhu Huang Haiyun Song Rui |
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| Institution: | Liu Huazhu1,Huang Haiyun2,Song Rui1(1.School of Electronic Engineering,Dongguan University of Technology,Dongguan 523808,China,2.Institute of New Electron Devices,Hangzhou Dianzi University,Hangzhou 310018,China) |
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| Abstract: | A 1.5 V low power rail-to-rail CMOS operational amplifier was designed.In order to enable the input common mode voltage range to achieve rail-to-rail,the NMOS tube and the PMOS tube parallel supplementary differential input pair was used in circuit structure,and proportional current mirror technology was adopted to realize the constant trans-conductance of input stage.In the middle gain stage design,the low voltage,wide-swing cascode structure was adopted,which was suitable to work in low voltage.In the out... |
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| Keywords: | low power rail-to-rail CMOS operational amplifier constant trans-conductance |
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