A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications
This paper proposes a three-stage op amp based on the SOI (silicon-on-insulator) process, which achieves a low offset voltage and temperature coefficient across a wide temperature range from −40 °C to 250 °C. It can be used in aerospace, oil and gas exploration, automotive electronics, nuclear indus...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/15/2/849 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832589181358964736 |
|---|---|
| author | Zhong Yang Jiaqi Li Jiangduo Fu Jiayin Song Qingsong Cai Shushan Qiao |
| author_facet | Zhong Yang Jiaqi Li Jiangduo Fu Jiayin Song Qingsong Cai Shushan Qiao |
| author_sort | Zhong Yang |
| collection | DOAJ |
| description | This paper proposes a three-stage op amp based on the SOI (silicon-on-insulator) process, which achieves a low offset voltage and temperature coefficient across a wide temperature range from −40 °C to 250 °C. It can be used in aerospace, oil and gas exploration, automotive electronics, nuclear industry, and in other fields where the ability of electronic devices to withstand high-temperature environments is strongly required. By utilizing a SC (Switched Capacitor) notch filter, the op amp achieves low input offset in a power-efficient manner. The circuit features a multi-path nested Miller compensation structure, consisting of a low-speed channel and a high-speed channel, which switch according to the input signal frequency. The input-stage operational amplifier is a fully differential, rail-to-rail design, utilizing tail current control to reduce the impact of common-mode voltage on the transconductance of the input stage. The two-stage operational amplifier uses both cascode and Miller compensation, minimizing the influence of the feedforward signal path and improving the amplifier’s response speed. The prototype op amp is fabricated in a 0.15 µm SOI process and draws 0.3 mA from a 5 V supply. The circuit occupies a chip area of 0.76 mm<sup>2</sup>. The measured open-loop gain exceeds 140 dB, with a 3 dB bandwidth greater than 100 kHz. The amplifier demonstrates stable performance across a wide temperature range from −40 °C to 250 °C, and exhibits an excellent input offset of approximately 20 µV at room temperature and an offset voltage temperature coefficient of 0.7 μV/°C in the full temperature range. |
| format | Article |
| id | doaj-art-4ccd8f1615264a3a9fcba3b6dfa36d61 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-4ccd8f1615264a3a9fcba3b6dfa36d612025-01-24T13:21:04ZengMDPI AGApplied Sciences2076-34172025-01-0115284910.3390/app15020849A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature ApplicationsZhong Yang0Jiaqi Li1Jiangduo Fu2Jiayin Song3Qingsong Cai4Shushan Qiao5Institute of Microelectronics of the Chinese Academy of Sciences, Chaoyang, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Chaoyang, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Chaoyang, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Chaoyang, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Chaoyang, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Chaoyang, Beijing 100029, ChinaThis paper proposes a three-stage op amp based on the SOI (silicon-on-insulator) process, which achieves a low offset voltage and temperature coefficient across a wide temperature range from −40 °C to 250 °C. It can be used in aerospace, oil and gas exploration, automotive electronics, nuclear industry, and in other fields where the ability of electronic devices to withstand high-temperature environments is strongly required. By utilizing a SC (Switched Capacitor) notch filter, the op amp achieves low input offset in a power-efficient manner. The circuit features a multi-path nested Miller compensation structure, consisting of a low-speed channel and a high-speed channel, which switch according to the input signal frequency. The input-stage operational amplifier is a fully differential, rail-to-rail design, utilizing tail current control to reduce the impact of common-mode voltage on the transconductance of the input stage. The two-stage operational amplifier uses both cascode and Miller compensation, minimizing the influence of the feedforward signal path and improving the amplifier’s response speed. The prototype op amp is fabricated in a 0.15 µm SOI process and draws 0.3 mA from a 5 V supply. The circuit occupies a chip area of 0.76 mm<sup>2</sup>. The measured open-loop gain exceeds 140 dB, with a 3 dB bandwidth greater than 100 kHz. The amplifier demonstrates stable performance across a wide temperature range from −40 °C to 250 °C, and exhibits an excellent input offset of approximately 20 µV at room temperature and an offset voltage temperature coefficient of 0.7 μV/°C in the full temperature range.https://www.mdpi.com/2076-3417/15/2/849SOIoperational amplifierhigh-temperature sensorchopper |
| spellingShingle | Zhong Yang Jiaqi Li Jiangduo Fu Jiayin Song Qingsong Cai Shushan Qiao A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications Applied Sciences SOI operational amplifier high-temperature sensor chopper |
| title | A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications |
| title_full | A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications |
| title_fullStr | A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications |
| title_full_unstemmed | A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications |
| title_short | A 250 °C Low-Power, Low-Temperature-Drift Offset Chopper-Stabilized Operational Amplifier with an SC Notch Filter for High-Temperature Applications |
| title_sort | 250 °c low power low temperature drift offset chopper stabilized operational amplifier with an sc notch filter for high temperature applications |
| topic | SOI operational amplifier high-temperature sensor chopper |
| url | https://www.mdpi.com/2076-3417/15/2/849 |
| work_keys_str_mv | AT zhongyang a250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT jiaqili a250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT jiangduofu a250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT jiayinsong a250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT qingsongcai a250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT shushanqiao a250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT zhongyang 250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT jiaqili 250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT jiangduofu 250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT jiayinsong 250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT qingsongcai 250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications AT shushanqiao 250clowpowerlowtemperaturedriftoffsetchopperstabilizedoperationalamplifierwithanscnotchfilterforhightemperatureapplications |