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中文摘要：
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．
英文摘要：
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. 18/μm 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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