A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting
A novel offset and finite-gain compensated differential switched-capacitor(SC) amplifier is presented. Incorporating the correlated double sampling (CDS) technique and input correlated level shifting (CLS) technique together, the DC offset and DC gain error of SC amplifier are further reduced by a f...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/8/9/986 |
| _version_ | 1797999111146831872 |
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| author | Yan Chen Yousheng Chen Yan Guo Chunxia Li |
| author_facet | Yan Chen Yousheng Chen Yan Guo Chunxia Li |
| author_sort | Yan Chen |
| collection | DOAJ |
| description | A novel offset and finite-gain compensated differential switched-capacitor(SC) amplifier is presented. Incorporating the correlated double sampling (CDS) technique and input correlated level shifting (CLS) technique together, the DC offset and DC gain error of SC amplifier are further reduced by a factor of op-amp DC gain compared with the conventional offset and finite-gain compensated SC amplifier. The effectiveness of the new scheme has been analyzed and verified by extensive simulations. An SC amplifier with the proposed scheme is designed in 130 nm CMOS technology. Simulated results show that with an op-amp having a low DC gain of 30 dB and an input offset of 10 mV, the proposed SC amplifier achieves an output offset and DC-gain error of 154 µV and 0.05%, respectively, which are significantly improved compared with 1.155 mV and 0.42% achieved in the conventional SC amplifier. |
| first_indexed | 2024-04-11T10:59:23Z |
| format | Article |
| id | doaj.art-34513ce799a641e09ccc3f15f6160ea9 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-04-11T10:59:23Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-34513ce799a641e09ccc3f15f6160ea92022-12-22T04:28:40ZengMDPI AGElectronics2079-92922019-09-018998610.3390/electronics8090986electronics8090986A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level ShiftingYan Chen0Yousheng Chen1Yan Guo2Chunxia Li3Department of Electronic and Communication Engineering, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaDepartment of Electronic and Communication Engineering, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaChip-Shine Microelectronics Company Limited, Shenzhen 518000, ChinaDepartment of Electronic and Communication Engineering, Shenzhen Institute of Information Technology, Shenzhen 518172, ChinaA novel offset and finite-gain compensated differential switched-capacitor(SC) amplifier is presented. Incorporating the correlated double sampling (CDS) technique and input correlated level shifting (CLS) technique together, the DC offset and DC gain error of SC amplifier are further reduced by a factor of op-amp DC gain compared with the conventional offset and finite-gain compensated SC amplifier. The effectiveness of the new scheme has been analyzed and verified by extensive simulations. An SC amplifier with the proposed scheme is designed in 130 nm CMOS technology. Simulated results show that with an op-amp having a low DC gain of 30 dB and an input offset of 10 mV, the proposed SC amplifier achieves an output offset and DC-gain error of 154 µV and 0.05%, respectively, which are significantly improved compared with 1.155 mV and 0.42% achieved in the conventional SC amplifier.https://www.mdpi.com/2079-9292/8/9/986switched capacitor networksdifferential amplifiersinput correlated level shiftinganalog circuitsanalog-digital conversion |
| spellingShingle | Yan Chen Yousheng Chen Yan Guo Chunxia Li A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting Electronics switched capacitor networks differential amplifiers input correlated level shifting analog circuits analog-digital conversion |
| title | A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting |
| title_full | A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting |
| title_fullStr | A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting |
| title_full_unstemmed | A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting |
| title_short | A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting |
| title_sort | novel offset and finite gain compensated switched capacitor amplifier with input correlated level shifting |
| topic | switched capacitor networks differential amplifiers input correlated level shifting analog circuits analog-digital conversion |
| url | https://www.mdpi.com/2079-9292/8/9/986 |
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