A 0.016mm2 144µW Three-Stage Amplifier Capable of Driving 1-to-15nF Capacitive Load with >0.95MHz GBW

📋 论文概要

本文提出一种新型三级放大器，通过优化的频率补偿技术，能够驱动1-15nF的大电容负载，同时实现0.016mm2的小面积和144µW的低功耗，GBW大于0.95MHz。解决了多级放大器驱动大电容负载时的稳定性问题，相比现有技术显著降低了功耗和面积。

💡 主要创新点

• 提出一种新型的三级放大器频率补偿方案，能够稳定驱动1-15nF宽范围电容负载，克服传统阻尼因子控制技术的功耗和面积瓶颈。
• 在0.016mm2的小面积内实现144µW的低功耗，同时保持大于0.95MHz的增益带宽积，适用于高色深LCD驱动器的参考缓冲器。

📄 原文摘要

Instituto Superior Tecnico, Lisbon, Portugal 1 2 High-color-depth LCD drivers require nF-range capacitors as the charge reservoirs to handle the glitch energy during the conversion of the DAC [1]. The reference buffers based on multi-stage amplifiers can enhance the precision under low-voltage supplies, but are exposed to instability when loaded by such large capacitive loads (CL). Frequency compensation via damping-factor control [2] is capable of extending the CL-drivability up to 1nF, however, at the cost of penalizing the power (426µW) and area (0.14mm2). Although recent works [3-4] have enhanced gain-bandwidth product (GBW) and slew rate (SR) showing better FOMS (=GBW·CL/Power) and FOML (=SR·CL/Power), the CL-drivability has not been improved (i.e., 0.8nF in [3] and 0.15nF in [4]). This paper describes a three-stage amplifier managed to afford particularly large and wide range of CL (1 to 15nF) with optimized power (144µW) and die size (0.016mm2), being very

👥 作者与机构

Zushu Yan1, Pui-In Mak1, Man-Kay Law1, Rui Martins1,2

University of Macau, Macau, China