用于二极管负反馈的小功率低失真放大器的紧凑输出级

2010 International Conference on Anti-Counterfeiting, Security and Identification Pub Date : 2010-07-18 DOI:10.1109/ICASID.2010.5551828

Xiaoliang Chen, J. Xing

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引用次数: 1

摘要

本文介绍了一种用于小功率轨对轨运算放大器的小型输出级。负反馈二极管可以减少均匀谐波失真，简化频率补偿。该放大器设计为负载20pF电容性负载，单位增益带宽为200 KHz，相位裕度为65°。当电压为5V时，静态电流限制为45uA。当信号频率为1khz时，THD降至- 95dB。最后，在标准的0.8um双极工艺中对该电路进行了全面模拟。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A compact output stage for low-power low-distortion amplifier with diode negative feedback

This paper describes a compact output stage for low-power rail to rail operational amplifier. A negative feedback diode could be used to decrease even harmonic distortion and simplify frequencies compensation. The amplifier is designed to be loaded 20pF capacitive load, and the unity-gain bandwidth is 200 KHz at 65° phase margin. The quiescent current is limit to 45uA when voltage supply is 5V. The THD down to −95dB when signal frequency at 1 KHz. Finally, this circuit has been thoroughly simulated in a standard 0.8um bipolar process.

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2010 International Conference on Anti-Counterfeiting, Security and Identification

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