A High Slew-Rate Enhancement Class-AB Operational Transconductance Amplifier (OTA) for Switched-Capacitor (SC) Applications
- Title
- A High Slew-Rate Enhancement Class-AB Operational Transconductance Amplifier (OTA) for Switched-Capacitor (SC) Applications
- Author
- 노정진
- Keywords
- Operational transconductance amplifier; slew-rate; class-AB; delta-sigma modulator; feedforward architecture; switched-capacitor
- Issue Date
- 2020-12
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE ACCESS, v. 8, page. 226167-226175
- Abstract
- This article presents a class-AB operational transconductance amplifier (OTA) with a high slew rate. The proposed class-AB OTA is applied with a slew-rate enhancement technique using an extremely low quiescent current. The additional current-reference common-mode feedback loop resolves the susceptibility to process, voltage, and temperature fluctuations resulting from slew-rate enhancement transistors. The proposed class-AB OTA is most widely used in block design, including, a switched-capacitor circuit, analog-to-digital converter, digital-to-analog converter, low-dropout regulator, and switched-capacitor DC-DC converters. In this study, performance was validated by applying the proposed class-AB OTA to a switched-capacitor delta-sigma modulator which requires high performance and high precision. The circuit was designed and simulated using a 0.18- mu m complementary metal-oxide semiconductor process.
- URI
- https://ieeexplore.ieee.org/document/9293306https://repository.hanyang.ac.kr/handle/20.500.11754/165058
- ISSN
- 2169-3536
- DOI
- 10.1109/ACCESS.2020.3044608
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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