A Standard-Cell-Based CMFB for Fully Synthesizable OTAs
In this paper, we propose a fully standard-cell-based common-mode feedback (CMFB) loop with an explicit voltage reference to improve the CMRR of pseudo-differential standard-cell-based amplifiers and to stabilize the dc output voltage. This latter feature allows robust biasing of operational transco...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-05-01
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| Series: | Journal of Low Power Electronics and Applications |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-9268/12/2/27 |
| _version_ | 1797485782764617728 |
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| author | Francesco Centurelli Riccardo Della Sala Giuseppe Scotti |
| author_facet | Francesco Centurelli Riccardo Della Sala Giuseppe Scotti |
| author_sort | Francesco Centurelli |
| collection | DOAJ |
| description | In this paper, we propose a fully standard-cell-based common-mode feedback (CMFB) loop with an explicit voltage reference to improve the CMRR of pseudo-differential standard-cell-based amplifiers and to stabilize the dc output voltage. This latter feature allows robust biasing of operational transconductance amplifiers (OTAs) based on a cascade of such stages. A detailed analysis of the CMFB is reported to both provide insight into circuit behavior and to derive useful design guidelines. The proposed CMFB is then exploited to build a fully standard-cell OTA suitable for automatic place and route. Simulation results referring to the standard-cell library of a commercial 130 nm CMOS process illustrated a differential gain of 28.3 dB with a gain-bandwidth product of 15.4 MHz when driving a 1.5 pF load capacitance. The OTA exhibits good robustness under PVT and mismatch variations and achieves state-of-the-art FOMs also thanks to the limited area footprint. |
| first_indexed | 2024-03-09T23:24:46Z |
| format | Article |
| id | doaj.art-c34b75908ce546c2aa18caeebcf4d7bb |
| institution | Directory Open Access Journal |
| issn | 2079-9268 |
| language | English |
| last_indexed | 2024-03-09T23:24:46Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj.art-c34b75908ce546c2aa18caeebcf4d7bb2023-11-23T17:21:10ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682022-05-011222710.3390/jlpea12020027A Standard-Cell-Based CMFB for Fully Synthesizable OTAsFrancesco Centurelli0Riccardo Della Sala1Giuseppe Scotti2Department of Information and Communication Technologies, Sapienza University of Rome, 00184 Rome, ItalyDepartment of Information and Communication Technologies, Sapienza University of Rome, 00184 Rome, ItalyDepartment of Information and Communication Technologies, Sapienza University of Rome, 00184 Rome, ItalyIn this paper, we propose a fully standard-cell-based common-mode feedback (CMFB) loop with an explicit voltage reference to improve the CMRR of pseudo-differential standard-cell-based amplifiers and to stabilize the dc output voltage. This latter feature allows robust biasing of operational transconductance amplifiers (OTAs) based on a cascade of such stages. A detailed analysis of the CMFB is reported to both provide insight into circuit behavior and to derive useful design guidelines. The proposed CMFB is then exploited to build a fully standard-cell OTA suitable for automatic place and route. Simulation results referring to the standard-cell library of a commercial 130 nm CMOS process illustrated a differential gain of 28.3 dB with a gain-bandwidth product of 15.4 MHz when driving a 1.5 pF load capacitance. The OTA exhibits good robustness under PVT and mismatch variations and achieves state-of-the-art FOMs also thanks to the limited area footprint.https://www.mdpi.com/2079-9268/12/2/27OTACMFBlow voltagelow powerautomatic place and routestandard-cell-based analog circuits |
| spellingShingle | Francesco Centurelli Riccardo Della Sala Giuseppe Scotti A Standard-Cell-Based CMFB for Fully Synthesizable OTAs Journal of Low Power Electronics and Applications OTA CMFB low voltage low power automatic place and route standard-cell-based analog circuits |
| title | A Standard-Cell-Based CMFB for Fully Synthesizable OTAs |
| title_full | A Standard-Cell-Based CMFB for Fully Synthesizable OTAs |
| title_fullStr | A Standard-Cell-Based CMFB for Fully Synthesizable OTAs |
| title_full_unstemmed | A Standard-Cell-Based CMFB for Fully Synthesizable OTAs |
| title_short | A Standard-Cell-Based CMFB for Fully Synthesizable OTAs |
| title_sort | standard cell based cmfb for fully synthesizable otas |
| topic | OTA CMFB low voltage low power automatic place and route standard-cell-based analog circuits |
| url | https://www.mdpi.com/2079-9268/12/2/27 |
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