低功率多级放大器的有源反馈频率补偿

Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285) Pub Date : 2002-08-07 DOI:10.1109/CICC.2002.1012831

Hoi Lee, P. Mok

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引用次数: 13

摘要

提出了一种适用于低功率多级放大器的有源反馈频率补偿技术。该补偿技术采用高速有源反馈模块，显著改善了放大器的频率响应和瞬态响应。采用标准的0.8/spl mu/m CMOS工艺实现的三级AFFC放大器，在驱动100pF容性负载时，可实现100dB增益、4.5MHz增益带宽积、65/spl度/相位裕度和1.5V//spl mu/s的摆率，功耗为0.4mW。

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Active-feedback frequency compensation for low-power multi-stage amplifiers

This paper describes a novel active-feedback frequency compensation (AFFC) technique for low-power multi-stage amplifiers. With a high-speed active feedback block, the proposed compensation technique significantly improves both the frequency and the transient responses of the amplifier. Implemented by a standard 0.8/spl mu/m CMOS process, a three-stage AFFC amplifier achieves 100dB gain, 4.5MHz gain-bandwidth product, 65/spl deg/ phase margin and 1.5V//spl mu/s slew rate with 0.4mW power consumption when driving a 100pF capacitive load.

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Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285)

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