| Citation: |
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]. Journal of Semiconductors, 2006, 27(12): 2101-2105.
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Liu A R, Yang H Z. A 1V,156.7μW,65.9dB Rail-to-Rail Operational Amplifier by Means of Negative Resistance Load and Replica-Amplifier Gain Enhancement[J]. Chin. J. Semicond., 2006, 27(12): 2101.
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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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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 5pF,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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