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A three-stage NMC operational amplifier with enhanced slew rate for switched-capacitor circuits.
- Source :
- Analog Integrated Circuits & Signal Processing; Mar2021, Vol. 106 Issue 3, p697-706, 10p
- Publication Year :
- 2021
-
Abstract
- This paper presents a new architecture for three-stage operational transconductance amplifiers (OTAs) with a class AB input stage to improve the slew rate. The nested Miller compensation scheme is utilized to stabilize the proposed OTA. A nonlinear current mirror in the first-stage is used to implement the class AB operation. Details of the proposed OTA are described and the circuit level simulation results are provided using HSPICE and a 90 nm CMOS technology to verify the usefulness of the proposed OTA. In comparison with the conventional class A OTA, it achieves 284.1% enhancement in the slew rate and the settling time is reduced from 15.7 ns to 9.1 ns with approximately the same power dissipation. [ABSTRACT FROM AUTHOR]
- Subjects :
- OPERATIONAL amplifiers
Subjects
Details
- Language :
- English
- ISSN :
- 09251030
- Volume :
- 106
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Analog Integrated Circuits & Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 149311316
- Full Text :
- https://doi.org/10.1007/s10470-020-01795-7