Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems
This paper presents a novel rail-to-rail Class-AB operational amplifier tailored for wake-up systems in motion sensor applications. By addressing limitations in free Class-AB designs, such as large inrush current, unstable bias conditions, and area ineffiiency, the proposed design achieves a gain of...
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MDPI AG
2025-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/2/316 |
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| author | Hussam AlShammary |
| author_facet | Hussam AlShammary |
| author_sort | Hussam AlShammary |
| collection | DOAJ |
| description | This paper presents a novel rail-to-rail Class-AB operational amplifier tailored for wake-up systems in motion sensor applications. By addressing limitations in free Class-AB designs, such as large inrush current, unstable bias conditions, and area ineffiiency, the proposed design achieves a gain of 59 dB and unity gain frequency of 550 kHz driving a 5 pF load. The inrush current is reduced from 1 mA to 7 µA, increasing the battery life. The layout area is reduced by 53% compared to the free Class-AB design, making it highly suitable for compact implementations. Operating at a low power consumption of 2 µW with a 1.8 V supply, the amplifier achieves a Signal-to-Noise-and-Distortion Ratio (SNDR) of 22 dB. These advancements demonstrate the potential of the design for energy-efficient analog front-end solutions in IoT and portable systems. |
| format | Article |
| id | doaj-art-15393bf3307748749ca07bf670eefd04 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-15393bf3307748749ca07bf670eefd042025-01-24T13:48:29ZengMDPI AGSensors1424-82202025-01-0125231610.3390/s25020316Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor SystemsHussam AlShammary0Electrical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi ArabiaThis paper presents a novel rail-to-rail Class-AB operational amplifier tailored for wake-up systems in motion sensor applications. By addressing limitations in free Class-AB designs, such as large inrush current, unstable bias conditions, and area ineffiiency, the proposed design achieves a gain of 59 dB and unity gain frequency of 550 kHz driving a 5 pF load. The inrush current is reduced from 1 mA to 7 µA, increasing the battery life. The layout area is reduced by 53% compared to the free Class-AB design, making it highly suitable for compact implementations. Operating at a low power consumption of 2 µW with a 1.8 V supply, the amplifier achieves a Signal-to-Noise-and-Distortion Ratio (SNDR) of 22 dB. These advancements demonstrate the potential of the design for energy-efficient analog front-end solutions in IoT and portable systems.https://www.mdpi.com/1424-8220/25/2/316Class-AB operational amplifierenergy-efficient sensorslow-power designInternet of things (IoT)rail-to-railenergy-efficient circuits |
| spellingShingle | Hussam AlShammary Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems Sensors Class-AB operational amplifier energy-efficient sensors low-power design Internet of things (IoT) rail-to-rail energy-efficient circuits |
| title | Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems |
| title_full | Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems |
| title_fullStr | Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems |
| title_full_unstemmed | Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems |
| title_short | Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems |
| title_sort | novel class ab operational amplifier for compact and energy efficient wake up sensor systems |
| topic | Class-AB operational amplifier energy-efficient sensors low-power design Internet of things (IoT) rail-to-rail energy-efficient circuits |
| url | https://www.mdpi.com/1424-8220/25/2/316 |
| work_keys_str_mv | AT hussamalshammary novelclassaboperationalamplifierforcompactandenergyefficientwakeupsensorsystems |