Research on High-Gain Operational Amplifier Architecyures: A Comparative Study of Cascode, Two-Stage, and Three-Stage Designs

DOI

10.2991/978-94-6463-821-9_96How to use a DOI?

Keywords

High-Gain op-amp; Cascode Structure; Gain-Boosting Techniques; Signal Amplification

Abstract

This study investigates advanced operational amplifier (op-amp) architectures for gain enhancement, focusing on cascode, two-stage, and three-stage configurations in high-performance circuits. The cascode op-amp combines the high gain of common-source amplifiers with the wide bandwidth and low output impedance of common-gate amplifiers, making it particularly suitable for high-frequency applications. Two-stage op-amps employ folded-cascode structures to achieve an optimal trade-off between gain and output swing, meeting the requirements for higher amplification. Three-stage op-amps further improve signal amplification by enhancing gain, stability, and output drive capability, enabling adaptation to diverse load conditions. Through a comprehensive analysis of each architecture’s advantages and limitations, this research provides valuable theoretical insights and practical optimization strategies for designing high-gain op-amps. The findings contribute to the development of more efficient, stable, and versatile electronic systems, offering guidance for engineers in selecting and refining op-amp designs for specific applications. This work underscores the importance of architectural innovation in advancing analog circuit performance.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Zijun Ni
PY  - 2025
DA  - 2025/08/31
TI  - Research on High-Gain Operational Amplifier Architecyures: A Comparative Study of Cascode, Two-Stage, and Three-Stage Designs
BT  - Proceedings of the 2025 2nd International Conference on Mechanics, Electronics Engineering and Automation (ICMEEA 2025)
PB  - Atlantis Press
SP  - 995
EP  - 1003
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-821-9_96
DO  - 10.2991/978-94-6463-821-9_96
ID  - Ni2025
ER  -