| 一种极低功耗运算放大器的设计与仿真 |
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| 引用本文： | 骆丽,蔡晓伟,宫琦.一种极低功耗运算放大器的设计与仿真[J].北方交通大学学报,2011(2):72-75. |
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| 作者姓名： | 骆丽 蔡晓伟 宫琦 |
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| 作者单位： | 北京交通大学电子信息工程学院,北京100044 |
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| 基金项目： | 国家自然科学基金资助项目（60976024） |
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| 摘 要： | 为了满足低电压低功耗的应用需求,本文利用MOSFET在亚阈区的超低功耗特性,实现了一种带共模反馈的亚阈运算放大器.该亚阈运算放大器结构简单,采用TSMC 0.18μm工艺实现,且工作于1.2 V电源电压下.通过Synopsys Hspice仿真,结果表明,该电路在输出负载为0.5pF时直流增益为70.97 dB、单位增益带宽6.346 MHz、相位裕度85.76°、正负压摆率分别为3.58V/μs和-3.58 V/μs,功耗仅为4.80μW.
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| 关 键 词： | 极低功耗 亚阈 运算放大器 直流增益 单位增益带宽 相位裕度 压摆率 |
Design and simulation of an ultra-low power operation amplifier |
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| LUO Li,CAI Xiaowei,GONG Qi.Design and simulation of an ultra-low power operation amplifier[J].Journal of Northern Jiaotong University,2011(2):72-75. |
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| Authors: | LUO Li CAI Xiaowei GONG Qi |
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| Institution: | (School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | To meet the requirements of low-voltage and low-power,a sub-threshold operation amplifier（op-amp） with common-mode feedback is designed,using the ultra-low power feature of MOSFET which works in sub-threshold region.The subthreshold op-amp is implemented under TSMC 0.18 μm process with a single 1.2 V supply and simulated by Synopsys Hspice.The simulation results show that the subthreshold op-amp whth a 0.5 pF output load has a DC gain of 70.97 dB,a unity gain bandwidth of 6.346 MHz,a phase margin of 85.76°,positive and negative slew rate of 3.58 V/μs and-3.58 V/μs respectively,and its power consumption is only 4.80 μW. |
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| Keywords: | ultra-low power sub-threshold operation amplifier DC gain unity gain bandwidth phase margin slew rate |
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