An ultra-wide bandwidth fully differential two-stage 65nm CMOS operational amplifier (Opamp) is presented, which uses a novel bandwidth extension technique called “pole duplication”. This technique is based on relocating the dominant pole with the same location with a non-dominant pole and adjusting 3-dB frequency and stability with a compensation network. Simulation results show that the proposed Opamp has 103MHz 3-dB bandwidth with a 2pF load capacitor. It consumes 9mA current from 1.2-V supply. Transition frequency of 2.4GHz and a gain of 29dB is accomplished. A 2pF load capacitance can be driven at a phase margin of 55∘. The suggested pole duplication technique is used to achieve higher 3-dB cut-off frequencies by adjusting the load capacitor. Fully differential two-stage Opamp is presented, which uses a novel bandwidth extension technique, is suitable for SoC active filter applications with 40μm×60μm layout area and ultra-wide 3-dB bandwidth.

中文翻译：

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具有用于 SoC 有源滤波器应用的新型带宽扩展技术的超宽带宽全差分 CMOS 运算放大器

超宽带宽全差分两级65提出了纳米 CMOS 运算放大器 (Opamp)，它使用了一种称为“极点复制”的新型带宽扩展技术。该技术基于将主极点重新定位到具有非主极点的相同位置，并通过补偿网络调整 3-dB 频率和稳定性。仿真结果表明，所提出的运算放大器有 103MHz 3-dB 带宽与 2pF 负载电容。消耗9来自 1.2V 电源的 mA 电流。转换频率为 2.4GHz 和 29 的增益dB 完成。A2pF负载电容可以在相位裕度驱动55∘. 建议的极点复制技术用于通过调整负载电容实现更高的 3dB 截止频率。提出了全差分两级运算放大器，它采用了一种新颖的带宽扩展技术，适用于 40 个 SoC 有源滤波器应用μ米×60μ米布局面积和超宽的 3-dB 带宽。