Design of a Multistage Amplifier with High Gain and Wide Bandwidth Performance
Benqiang Lv, Xiaohong Peng, Zhiding Zhu, Xiaoqing Li, Yong Hu, Yunkang Liu
Abstract
Benqiang Lv, Xiaohong Peng, Zhiding Zhu, Xiaoqing Li, Yong Hu, Yunkang Liu
Abstract
A high performance design of a three-stage amplifier is presented in this paper using the Impedance Adapting Compensation (IAC). The circuit is designed in 0.35 μm CMOS technology with 3.3V voltage power supply. When driving a 150 pF capacitive load, this amplifier achieves as high as 144dB dc gain,7.44MHz gain-bandwidth product (GBW) ,60° phase margin(PM),1.26V/us slew rate (SR) and 0.95mW power dissipation. This work provides a higher dc gain and wider GBW compared to other multistage amplifiers.
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A high performance design of a three-stage amplifier is presented in this paper using the Impedance Adapting Compensation (IAC). The circuit is designed in 0.35 μm CMOS technology with 3.3V voltage power supply. When driving a 150 pF capacitive load, this amplifier achieves as high as 144dB dc gain,7.44MHz gain-bandwidth product (GBW) ,60° phase margin(PM),1.26V/us slew rate (SR) and 0.95mW power dissipation. This work provides a higher dc gain and wider GBW compared to other multistage amplifiers.
Key concepts: Gain–bandwidth product, Phase margin, Fully differential amplifier, Open-loop gain, Amplifier, Electrical engineering, RF power amplifier, Slew rate