Low Power CMOS-Based Hall Sensor with Simple Structure Using Double-Sampling Delta-Sigma ADC
| Autor: | Ju Yong Lee, Younggyun Oh, Sein Oh, Hyungil Chae |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
hall sensor
Letter Offset (computer science) Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology lcsh:Chemical technology magnetic sensor Delta-sigma modulation 01 natural sciences Biochemistry Analytical Chemistry Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering lcsh:TP1-1185 delta-sigma ADC double sampling Electrical and Electronic Engineering Instrumentation Spinning Physics business.industry Flicker 020208 electrical & electronic engineering 010401 analytical chemistry Electrical engineering horizontal hall device Atomic and Molecular Physics and Optics 0104 chemical sciences CMOS Double sampling Power consumption Hall effect sensor business |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 20, Iss 5285, p 5285 (2020) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s20185285 |
| Popis: | A CMOS (Complementary metal-oxide-semiconductor) Hall sensor with low power consumption and simple structure is introduced. The tiny magnetic signal from Hall device could be detected by a high-resolution delta-sigma ADC in presence of offset and flickering noise. Also, the offset as well as the flickering noise are effectively suppressed by the current spinning technique combined with double sampling switches of the ADC. The double sampling scheme of the ADC reduces the operating frequency and helps to reduce the power consumption. The prototype Hall sensor is fabricated in a 0.18-µm CMOS process, and the measurement shows detection range of ±150 mT and sensitivity of 110 µV/mT. The size of active area is 0.7 mm2, and the total power consumption is 4.9 mW. The proposed system is advantageous not only for low power consumption, but also for small sensor size due to its simplicity. |
| Databáze: | OpenAIRE |
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