A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications
In this paper, a new technique for improvement on the DC voltage gain, while keeping the high-linearity in symmetrical operational transconductance amplifier (OTA) bulk-driven (BD) topology is proposed. These features are achieved by allying two topological solutions: enhanced forward-body-biasing s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Journal of Low Power Electronics and Applications |
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| Online Access: | https://www.mdpi.com/2079-9268/11/4/40 |
| _version_ | 1797503325385523200 |
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| author | Rafael Sanchotene Silva Luis Henrique Rodovalho Orazio Aiello Cesar Ramos Rodrigues |
| author_facet | Rafael Sanchotene Silva Luis Henrique Rodovalho Orazio Aiello Cesar Ramos Rodrigues |
| author_sort | Rafael Sanchotene Silva |
| collection | DOAJ |
| description | In this paper, a new technique for improvement on the DC voltage gain, while keeping the high-linearity in symmetrical operational transconductance amplifier (OTA) bulk-driven (BD) topology is proposed. These features are achieved by allying two topological solutions: enhanced forward-body-biasing self-cascode current mirror, and source degeneration. The proposed concept is demonstrated through simulations with typical process parameters and Monte Carlo analysis on nominal transistors of the CMOS TSMC 180 nm node. Results indicate that the proposed OTA can achieve a very small transconductance, only 542 pA/V while keeping a voltage gain higher than 60 dB, 150 dB CMRR, and high linearity of 475 mVpp (1% THD), consuming only 1.9 nW for a supply voltage of 0.6 V. This set of features allows the proposed OTA to be an attractive solution for implementing OTA-C filters for the analog front-ends in wearable devices and bio-sensing. |
| first_indexed | 2024-03-10T03:48:59Z |
| format | Article |
| id | doaj.art-a018b4584caa42f4882816fc73e3eb91 |
| institution | Directory Open Access Journal |
| issn | 2079-9268 |
| language | English |
| last_indexed | 2024-03-10T03:48:59Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj.art-a018b4584caa42f4882816fc73e3eb912023-11-23T09:01:12ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682021-10-011144010.3390/jlpea11040040A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing ApplicationsRafael Sanchotene Silva0Luis Henrique Rodovalho1Orazio Aiello2Cesar Ramos Rodrigues3Biomedical Engineering Institute, Federal University of Santa Catarina (IEB-UFSC), Florianópolis 88040-900, BrazilBiomedical Engineering Institute, Federal University of Santa Catarina (IEB-UFSC), Florianópolis 88040-900, BrazilDepartment of Electrical and Computer Engineering, National University of Singapore (NUS), Singapore 117583, SingaporeBiomedical Engineering Institute, Federal University of Santa Catarina (IEB-UFSC), Florianópolis 88040-900, BrazilIn this paper, a new technique for improvement on the DC voltage gain, while keeping the high-linearity in symmetrical operational transconductance amplifier (OTA) bulk-driven (BD) topology is proposed. These features are achieved by allying two topological solutions: enhanced forward-body-biasing self-cascode current mirror, and source degeneration. The proposed concept is demonstrated through simulations with typical process parameters and Monte Carlo analysis on nominal transistors of the CMOS TSMC 180 nm node. Results indicate that the proposed OTA can achieve a very small transconductance, only 542 pA/V while keeping a voltage gain higher than 60 dB, 150 dB CMRR, and high linearity of 475 mVpp (1% THD), consuming only 1.9 nW for a supply voltage of 0.6 V. This set of features allows the proposed OTA to be an attractive solution for implementing OTA-C filters for the analog front-ends in wearable devices and bio-sensing.https://www.mdpi.com/2079-9268/11/4/40bulk-driven OTAtransconductorself-cascode mirror |
| spellingShingle | Rafael Sanchotene Silva Luis Henrique Rodovalho Orazio Aiello Cesar Ramos Rodrigues A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications Journal of Low Power Electronics and Applications bulk-driven OTA transconductor self-cascode mirror |
| title | A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications |
| title_full | A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications |
| title_fullStr | A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications |
| title_full_unstemmed | A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications |
| title_short | A 1.9 nW, Sub-1 V, 542 pA/V Linear Bulk-Driven OTA with 154 dB CMRR for Bio-Sensing Applications |
| title_sort | 1 9 nw sub 1 v 542 pa v linear bulk driven ota with 154 db cmrr for bio sensing applications |
| topic | bulk-driven OTA transconductor self-cascode mirror |
| url | https://www.mdpi.com/2079-9268/11/4/40 |
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