An improved reversed miller compensation technique for three‐stage CMOS OTAs with double pole‐zero cancellation and almost single‐pole frequency response,International Journal of Circuit Theory and Applications

当前位置： X-MOL 学术 › Int. J. Circ. Theory Appl. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

An improved reversed miller compensation technique for three‐stage CMOS OTAs with double pole‐zero cancellation and almost single‐pole frequency response
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2020-06-10 , DOI: 10.1002/cta.2827
Francesco Centurelli ₁ , Pietro Monsurrò ₁ , Giuseppe Scotti ₁ , Pasquale Tommasino ₁ , Alessandro Trifiletti ₁

Affiliation

This paper presents an improved reversed nested Miller compensation technique exploiting a single additional feed‐forward stage to obtain double pole‐zero cancellation and ideally single‐pole behavior, in a three‐stage Miller amplifier. The approach allows designing a three‐stage operational transconductance amplifier (OTA) with one dominant pole and two (ideally) mutually cancelling pole‐zero doublets. We demonstrate the robustness of the proposed cancellation technique, showing that it is not significantly influenced by process and temperature variations. The proposed design equations allow setting the unity‐gain frequency of the amplifier and the complex poles' resonance frequency and quality factor. We introduce the notion of bandwidth efficiency to quantify the OTA performance with respect to a telescopic cascode OTA for given load capacitance and power consumption constraints and demonstrate analytically that the proposed approach allows a bandwidth efficiency that can ideally approach 100%. A CMOS implementation of the proposed compensation technique is provided, in which a current reuse scheme is used to reduce the total current consumption. The OTA has been designed using a 130‐nm CMOS process by STMicroelectronics and achieves a DC gain larger than 120 dB, with almost single‐pole frequency response. Monte Carlo simulations have been performed to show the robustness of the proposed approach to process, voltage, and temperature (PVT) variations and mismatches.

中文翻译：

改进的逆米勒补偿技术，用于具有双极点零消除和几乎单极点频率响应的三级CMOS OTA

本文提出了一种改进的反向嵌套米勒补偿技术，该技术利用一个额外的前馈级在三级米勒放大器中获得双极点零消除和理想的单极点性能。该方法允许设计一个三级运算跨导放大器（OTA），该放大器具有一个主极和两个（理想情况下）相互抵消的零极点双峰。我们证明了所提出的抵消技术的鲁棒性，表明它不受工艺和温度变化的影响很大。提出的设计方程式可用于设置放大器的单位增益频率以及复极的谐振频率和品质因数。我们介绍了带宽效率的概念，以针对给定的负载电容和功耗约束相对于可伸缩共源共栅OTA量化OTA性能，并分析性地证明了所提出的方法所允许的带宽效率可以理想地接近100％。提供了所提出的补偿技术的CMOS实现，其中使用电流重用方案来降低总电流消耗。OTA是由意法半导体（STMicroelectronics）使用130 nm CMOS工艺设计的，可实现大于120 dB的DC增益，几乎具有单极点频率响应。已经进行了蒙特卡洛模拟，以显示所提出的方法对工艺，电压和温度（PVT）变化和失配的鲁棒性。

更新日期：2020-06-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11