带正反馈补偿方案的三级放大器

Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285) Pub Date : 2002-08-07 DOI:10.1109/CICC.2002.1012833

J. Ramos, M. Steyaert

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引用次数: 19

摘要

介绍了一种驱动大容性负载的CMOS运放。与嵌套米勒补偿(NMC)相比，该技术采用正反馈补偿(PFC)来改善频率响应，使电路占用更少的硅面积和简单的设计。在1.5 V电压下，电路的功耗为275 /spl mu/W，增益超过100 dB，增益带宽为2.7 MHz，在驱动130 pF负载时的平均摆压率为1.0 V//spl mu/s。

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Three stage amplifier with positive feedback compensation scheme

A CMOS opamp that can drive large capacitive loads is presented. The technique employs a positive feedback compensation (PFC) to improve frequency response as compared to nested Miller compensation (NMC), allowing the circuit to occupy less silicon area and straightforward design. At 1.5 V, the circuit dissipates 275 /spl mu/W, has more than 100 dB gain, a gain bandwidth of 2.7 MHz and 1.0 V//spl mu/s average slew rate while driving a 130 pF load.

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

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