A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal
This paper presents a low-noise inverter-based current-mode instrumentation amplifier with tunable gain and bandwidth for electromyogram (EMG) and electrooculogram (EOG) biopotential signals, targeting low input noise while maintaining low power consumption. The gain tuning method is based on pseudo...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Electronics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-9292/12/12/2592 |
| _version_ | 1797595181759856640 |
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| author | Rafael Vieira Fabian Näf Ricardo Martins Nuno Horta Nuno Lourenço Ricardo Póvoa |
| author_facet | Rafael Vieira Fabian Näf Ricardo Martins Nuno Horta Nuno Lourenço Ricardo Póvoa |
| author_sort | Rafael Vieira |
| collection | DOAJ |
| description | This paper presents a low-noise inverter-based current-mode instrumentation amplifier with tunable gain and bandwidth for electromyogram (EMG) and electrooculogram (EOG) biopotential signals, targeting low input noise while maintaining low power consumption. The gain tuning method is based on pseudo-resistors, whereas the bandwidth is tunable due to a varactor system that is controlled by the same control voltage that tunes the gain. The circuit was designed and manufactured using the 110 nm UMC CMOS technology node, occupying an area of 0.624 mm<sup>2</sup>. The circuit presents a functioning mode for each biopotential signal with different characteristics, for the EMG a gain of 34.7 dB and a bandwidth of 1412 Hz was measured, with an input referred noise of 1.407 μV which matches a noise efficiency factor of 1.44. The EOG mode achieves a 39.5 dB gain and a 22.4 Hz bandwidth while presenting an input-referred noise of 0.829 μV corresponding to a noise efficiency factor of 6.37. For both modes, the supply voltage is 1.2 V and the circuit consumes 1 μA. |
| first_indexed | 2024-03-11T02:33:02Z |
| format | Article |
| id | doaj.art-c2ac2febdee0433ca1adef5d799fc537 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-11T02:33:02Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-c2ac2febdee0433ca1adef5d799fc5372023-11-18T10:07:55ZengMDPI AGElectronics2079-92922023-06-011212259210.3390/electronics12122592A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential SignalRafael Vieira0Fabian Näf1Ricardo Martins2Nuno Horta3Nuno Lourenço4Ricardo Póvoa5Instituto de Telecomunicações, 1049-001 Lisboa, PortugalInstituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, PortugalInstituto de Telecomunicações, 1049-001 Lisboa, PortugalInstituto de Telecomunicações, 1049-001 Lisboa, PortugalInstituto de Telecomunicações, 1049-001 Lisboa, PortugalInstituto de Telecomunicações, 1049-001 Lisboa, PortugalThis paper presents a low-noise inverter-based current-mode instrumentation amplifier with tunable gain and bandwidth for electromyogram (EMG) and electrooculogram (EOG) biopotential signals, targeting low input noise while maintaining low power consumption. The gain tuning method is based on pseudo-resistors, whereas the bandwidth is tunable due to a varactor system that is controlled by the same control voltage that tunes the gain. The circuit was designed and manufactured using the 110 nm UMC CMOS technology node, occupying an area of 0.624 mm<sup>2</sup>. The circuit presents a functioning mode for each biopotential signal with different characteristics, for the EMG a gain of 34.7 dB and a bandwidth of 1412 Hz was measured, with an input referred noise of 1.407 μV which matches a noise efficiency factor of 1.44. The EOG mode achieves a 39.5 dB gain and a 22.4 Hz bandwidth while presenting an input-referred noise of 0.829 μV corresponding to a noise efficiency factor of 6.37. For both modes, the supply voltage is 1.2 V and the circuit consumes 1 μA.https://www.mdpi.com/2079-9292/12/12/2592low-noise amplifierlow powertunable gaintunable bandwidthbiopotential signalsCMOS |
| spellingShingle | Rafael Vieira Fabian Näf Ricardo Martins Nuno Horta Nuno Lourenço Ricardo Póvoa A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal Electronics low-noise amplifier low power tunable gain tunable bandwidth biopotential signals CMOS |
| title | A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal |
| title_full | A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal |
| title_fullStr | A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal |
| title_full_unstemmed | A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal |
| title_short | A Tunable Gain and Bandwidth Low-Noise Amplifier with 1.44 NEF for EMG and EOG Biopotential Signal |
| title_sort | tunable gain and bandwidth low noise amplifier with 1 44 nef for emg and eog biopotential signal |
| topic | low-noise amplifier low power tunable gain tunable bandwidth biopotential signals CMOS |
| url | https://www.mdpi.com/2079-9292/12/12/2592 |
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