| 负阻负载和复制运放增益增强技术相结合的低电压低功耗高增益端到端输出范围运算放大器 |
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| 引用本文： | 刘爱荣,杨华中. 负阻负载和复制运放增益增强技术相结合的低电压低功耗高增益端到端输出范围运算放大器[J]. 半导体学报, 2006, 27(12) |
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| 作者姓名： | 刘爱荣 杨华中 |
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| 作者单位： | 清华大学电子工程系,北京,100084 |
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| 摘 要： | 设计了一种低电压低功耗高增益端到端运算放大器.为了提高运放的直流增益,采用了复制运放增益增强技术,这种技术的特点是在提高增益的同时不影响输出摆幅,非常适合低电压场合.该运放采用0.18μm标准CMOS工艺,工作电压为1V.仿真结果表明,在5pF负载电容下所获得运放的直流增益达到65.9dB,增益带宽积为70.28MHz,相位裕度为50°,静态功耗为156.7μW.
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| 关 键 词： | 低电压低功耗 高直流增益 复制运放增益增强技术 负阻负载 |
A 1V,156.7μW,65.9dB Rail-to-Rail Operational Amplifier by Means of Negative Resistance Load and Replica-Amplifier Gain Enhancement |
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| Liu Airong,Yang Huazhong. A 1V,156.7μW,65.9dB Rail-to-Rail Operational Amplifier by Means of Negative Resistance Load and Replica-Amplifier Gain Enhancement[J]. Chinese Journal of Semiconductors, 2006, 27(12) |
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| Authors: | Liu Airong Yang Huazhong |
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| Abstract: | A low-voltage,low-power,and high-gain rail-to-rail operational amplifier(OpAmp)is presented.The replica-amplifier gain enhancement technique is applied to improve the DC gain of the amplifier,which does not degrade the output swing and is very suitable for low-voltage applications.In a 0.18μm standard CMOS process,a 1V OpAmp with rail-to-rail output is designed.For a load capacitance of 5 pF,simulation by HSPICE shows that this OpAmp achieves an effective open-loop DC gain of 65.9dB,gain bandwidth of 70.28 MHz,and phase margin of 50° with a quiescent power dissipation of 156.7μW. |
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| Keywords: | low-voltage low-power high DC gain replica-amplifier gain enhancement negative resistance load |
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