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本文提出了一种工作在0.9V电压、功耗仅6.3μW的多级放大器，能够驱动500pF的大电容负载，并实现1.34MHz的增益带宽积。通过基于反馈理论的新型频率补偿方法，简化了高阶米勒放大器的分析，解决了大电容负载下宽带宽设计的难题。
of driving a large capacitive load with wide bandwidth are becoming more important for various applications. The conventional frequency compensation methods, however, are based on cumbersome transfer function derivations or complicated local loop analysis [1]-[3], inhibiting intuitive understanding. An approach is presented in this paper, which generates insight for the poles and zeros through distinctive compensation analysis, and is applicable to largenumber-stage amplifiers. The approach applies feedback theory and simplifies high-frequency Miller amplifiers, thereby reducing orders of circuits and improving insight. Since Miller compensation generates a large equivalent input capacitance by input-shunt-feedback, a simple Miller compensation amplifier equates a control
Wanyuan Qu1, Jong-Pil Im2, Hyun-Sik Kim1, Gyu-Hyeong Cho1, 1
KAIST, Daejeon, Korea, 2ETRI, Daejeon, Korea As process scales down, low-voltage, low-power, multistage amplifiers capable