A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications
This paper presents a low-noise and low-power audio preamplifier. The proposed low-noise preamplifier employs a delay-time chopper stabilization (CHS) technique and a negative-R circuit, both in the auxiliary amplifier to cancel the non-idealities of the main amplifier. The proposed technique makes...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-05-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/11/5/478 |
| _version_ | 1797568954643775488 |
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| author | Jamel Nebhen Khaled Alnowaiser Stephane Meillere |
| author_facet | Jamel Nebhen Khaled Alnowaiser Stephane Meillere |
| author_sort | Jamel Nebhen |
| collection | DOAJ |
| description | This paper presents a low-noise and low-power audio preamplifier. The proposed low-noise preamplifier employs a delay-time chopper stabilization (CHS) technique and a negative-R circuit, both in the auxiliary amplifier to cancel the non-idealities of the main amplifier. The proposed technique makes it possible to mitigate the preamplifier 1/<i>f</i> noise and thermal noise and improve its linearity. The low-noise preamplifier is implemented in 65 nm complementary metal-oxide semiconductor (CMOS) technology. The supply voltage is 1.2 V, while the power consumption is 159 µW, and the core area is 192 µm<sup>2</sup>. The proposed circuit of the preamplifier was fabricated and measured. From the measurement results over a signal bandwidth of 20 kHz, it achieves a signal-to-noise ratio (SNR) of 80 dB, an equivalent-input referred noise of 5 nV/√Hz and a noise efficiency factor (NEF) of 1.9 within the frequency range from 1 Hz to 20 kHz. |
| first_indexed | 2024-03-10T20:04:08Z |
| format | Article |
| id | doaj.art-0ce28b4805294dbbbf5c9aaaa0ff8fa5 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T20:04:08Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-0ce28b4805294dbbbf5c9aaaa0ff8fa52023-11-19T23:21:23ZengMDPI AGMicromachines2072-666X2020-05-0111547810.3390/mi11050478A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio ApplicationsJamel Nebhen0Khaled Alnowaiser1Stephane Meillere2College of Computer Engineering and Sciences, Prince Sattam bin Abdulaziz University, P.O. Box 151, Alkharj 11942, Saudi ArabiaCollege of Computer Engineering and Sciences, Prince Sattam bin Abdulaziz University, P.O. Box 151, Alkharj 11942, Saudi ArabiaAix Marseille University, CNRS, IM2NP UMR 7334, 13451 Marseille, FranceThis paper presents a low-noise and low-power audio preamplifier. The proposed low-noise preamplifier employs a delay-time chopper stabilization (CHS) technique and a negative-R circuit, both in the auxiliary amplifier to cancel the non-idealities of the main amplifier. The proposed technique makes it possible to mitigate the preamplifier 1/<i>f</i> noise and thermal noise and improve its linearity. The low-noise preamplifier is implemented in 65 nm complementary metal-oxide semiconductor (CMOS) technology. The supply voltage is 1.2 V, while the power consumption is 159 µW, and the core area is 192 µm<sup>2</sup>. The proposed circuit of the preamplifier was fabricated and measured. From the measurement results over a signal bandwidth of 20 kHz, it achieves a signal-to-noise ratio (SNR) of 80 dB, an equivalent-input referred noise of 5 nV/√Hz and a noise efficiency factor (NEF) of 1.9 within the frequency range from 1 Hz to 20 kHz.https://www.mdpi.com/2072-666X/11/5/478preamplifierchopper stabilizationnegative-RCMOS operational transconductance amplifier (OTA)1/f noise |
| spellingShingle | Jamel Nebhen Khaled Alnowaiser Stephane Meillere A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications Micromachines preamplifier chopper stabilization negative-R CMOS operational transconductance amplifier (OTA) 1/f noise |
| title | A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications |
| title_full | A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications |
| title_fullStr | A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications |
| title_full_unstemmed | A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications |
| title_short | A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications |
| title_sort | 5 nv √hz chopper negative r stabilization preamplifier for audio applications |
| topic | preamplifier chopper stabilization negative-R CMOS operational transconductance amplifier (OTA) 1/f noise |
| url | https://www.mdpi.com/2072-666X/11/5/478 |
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