Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit
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-...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-02-01
|
| Series: | Journal of Low Power Electronics and Applications |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-9268/12/1/9 |
| _version_ | 1797470407841808384 |
|---|---|
| author | Anindita Paul Jaime Ramirez-Angulo Héctor Vázquez-Leal Jesús Huerta-Chua Alejandro Diaz-Sanchez |
| author_facet | Anindita Paul Jaime Ramirez-Angulo Héctor Vázquez-Leal Jesús Huerta-Chua Alejandro Diaz-Sanchez |
| author_sort | Anindita Paul |
| collection | DOAJ |
| description | 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 R<sub>L</sub> = 1 MΩ and 7.3 for R<sub>L</sub> = 200 Ω. |
| first_indexed | 2024-03-09T19:35:57Z |
| format | Article |
| id | doaj.art-d4f3cd2ab8d74d06a038bc54d3dff487 |
| institution | Directory Open Access Journal |
| issn | 2079-9268 |
| language | English |
| last_indexed | 2024-03-09T19:35:57Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj.art-d4f3cd2ab8d74d06a038bc54d3dff4872023-11-24T01:55:55ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682022-02-01121910.3390/jlpea12010009Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of MeritAnindita Paul0Jaime Ramirez-Angulo1Héctor Vázquez-Leal2Jesús Huerta-Chua3Alejandro Diaz-Sanchez4Electrical Engineering & Renewable Energy, Oregon Institute of Technology, 3201 Campus Drive, Klamath Falls, OR 97601, USAInstituto Tecnológico Superior de Poza Rica, Tecnológico Nacional de México, Luis Donaldo Colosio Murrieta S/N, Arroyo del Maíz, Poza Rica 93230, MexicoFacultad de Instrumentación Electrónica, Universidad Veracruzana, Cto. Gonzalo Aguirre Beltrán S/N, Xalapa 91000, MexicoInstituto Tecnológico Superior de Poza Rica, Tecnológico Nacional de México, Luis Donaldo Colosio Murrieta S/N, Arroyo del Maíz, Poza Rica 93230, MexicoDepartment of Electronics, INAOE, Puebla 72840, MexicoA 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 R<sub>L</sub> = 1 MΩ and 7.3 for R<sub>L</sub> = 200 Ω.https://www.mdpi.com/2079-9268/12/1/9analog integrated circuitclass-ABfully differentialmiller effectslew-rate |
| spellingShingle | Anindita Paul Jaime Ramirez-Angulo Héctor Vázquez-Leal Jesús Huerta-Chua Alejandro Diaz-Sanchez Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit Journal of Low Power Electronics and Applications analog integrated circuit class-AB fully differential miller effect slew-rate |
| title | Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit |
| title_full | Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit |
| title_fullStr | Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit |
| title_full_unstemmed | Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit |
| title_short | Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit |
| title_sort | fully differential miller op amp with enhanced large and small signal figures of merit |
| topic | analog integrated circuit class-AB fully differential miller effect slew-rate |
| url | https://www.mdpi.com/2079-9268/12/1/9 |
| work_keys_str_mv | AT aninditapaul fullydifferentialmilleropampwithenhancedlargeandsmallsignalfiguresofmerit AT jaimeramirezangulo fullydifferentialmilleropampwithenhancedlargeandsmallsignalfiguresofmerit AT hectorvazquezleal fullydifferentialmilleropampwithenhancedlargeandsmallsignalfiguresofmerit AT jesushuertachua fullydifferentialmilleropampwithenhancedlargeandsmallsignalfiguresofmerit AT alejandrodiazsanchez fullydifferentialmilleropampwithenhancedlargeandsmallsignalfiguresofmerit |