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Design and Analysis of Miller Compensated Two-Stage Operational Amplifier
- 1 School of Information Science and Technology, North China University of Technology Beijing, 100144, China
* Author to whom correspondence should be addressed.
Abstract
With the development of integrated circuit technology, the size of electronic equipment continues to reduce, and speed continues to increase. Operational amplifiers are the key circuit in analog ICs, and the required performance of operational amplifiers is also increasingly high, research and design of high-performance operational amplifiers has become one of the key topics of today's research. A CMOS two-stage operational amplifier with high unity-gain bandwidth is analysed and designed with an appropriate Miller-compensation technique in this research to improve the frequency characteristics and stability. The design is based on 180nm CMOS process. Its performance is simulated and analysed in Cadence software environment. The performance parameters are shown by simulation results that the amplifier has a gain of 61.81dB, a GB (unity-gain bandwidth) of 907.42MHz and a phase margin of 75.02°. The experimental results show that it achieves high unity-gain bandwidth while ensuring gain and stability. Through this study, the principles of two-stage operational amplifiers and their compensation as well as the design and simulation are shown in detail in both theoretical and experimental sections.
Keywords
Operational amplifier, two-stage, stability, Miller-compensation, CMOS-design.
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Cite this article
Zou,Y. (2024). Design and Analysis of Miller Compensated Two-Stage Operational Amplifier. Applied and Computational Engineering,107,14-23.
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Volume title: Proceedings of the 2nd International Conference on Machine Learning and Automation
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