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Article

Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit

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Electrical Engineering & Renewable Energy, Oregon Institute of Technology, 3201 Campus Drive, Klamath Falls, OR 97601, USA
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Instituto Tecnológico Superior de Poza Rica, Tecnológico Nacional de México, Luis Donaldo Colosio Murrieta S/N, Arroyo del Maíz, Poza Rica 93230, Mexico
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Facultad de Instrumentación Electrónica, Universidad Veracruzana, Cto. Gonzalo Aguirre Beltrán S/N, Xalapa 91000, Mexico
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Consejo Veracruzano de Investigación Científica y Desarrollo Tecnológico (COVEICYDET), Av Rafael Murillo Vidal No. 1735, Cuauhtémoc, Xalapa 91069, Mexico
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Department of Electronics, INAOE, Puebla 72840, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: Andrea Acquaviva
J. Low Power Electron. Appl. 2022, 12(1), 9; https://doi.org/10.3390/jlpea12010009
Received: 27 December 2021 / Revised: 5 February 2022 / Accepted: 5 February 2022 / Published: 8 February 2022
A highly power-efficient, fully differential Miller op-amp with accurately controlled output quiescent current is introduced. The op-amp can drive both capacitive and resistive load due to the presence of the auxiliary amplifier. This amplifier helps to achieve class AB operation of the proposed op-amp. The fully differential auxiliary amplifier is compact and uses a resistive local common-mode feedback network. It consumes only 6% of the total current of the op-amp. The proposed op-amp has several innovative features. Incorporating the auxiliary amplifier helps to improve the unity gain frequency, power efficiency, slew-rate, and common-mode rejection ratio of the proposed op-amp. It can drive a wide range of resistive (200 Ω–1 MΩ) and capacitive loads (5 pF–300 pF). The op-amp has a large signal dynamic current efficiency of 8.6 and a large signal static current efficiency of 7.9. The small-signal figure of merit is 8.7 for RL = 1 MΩ and 7.3 for RL = 200 Ω. View Full-Text
Keywords: analog integrated circuit; class-AB; fully differential; miller effect; slew-rate analog integrated circuit; class-AB; fully differential; miller effect; slew-rate
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MDPI and ACS Style

Paul, A.; Ramirez-Angulo, J.; Vázquez-Leal, H.; Huerta-Chua, J.; Diaz-Sanchez, A. Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit. J. Low Power Electron. Appl. 2022, 12, 9. https://doi.org/10.3390/jlpea12010009

AMA Style

Paul A, Ramirez-Angulo J, Vázquez-Leal H, Huerta-Chua J, Diaz-Sanchez A. Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit. Journal of Low Power Electronics and Applications. 2022; 12(1):9. https://doi.org/10.3390/jlpea12010009

Chicago/Turabian Style

Paul, Anindita, Jaime Ramirez-Angulo, Héctor Vázquez-Leal, Jesús Huerta-Chua, and Alejandro Diaz-Sanchez. 2022. "Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit" Journal of Low Power Electronics and Applications 12, no. 1: 9. https://doi.org/10.3390/jlpea12010009

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