| Autor: |
Chien-Hung Kuo, Shr-Lung Chen, Shen-Iuan Liu |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
IEEE Sensors Journal. 3:241-245 |
| ISSN: |
1530-437X |
| DOI: |
10.1109/jsen.2002.807485 |
| Popis: |
In this paper, a CMOS magnetic field to frequency converter with high resolution is presented. It is composed of two voltage-controlled ring oscillators whose output frequency differences linearly vary with the magnetic field perpendicular to the chip surface. The prototype circuit has been fabricated in a 0.5-/spl mu/m CMOS process and operated at a 5-V supply voltage. The measured sensitivity is 24 kHz/mT and the power consumption is 5.1 mW. The small equivalent resolution of at least 20 /spl mu/T can be achieved. The frequency offset is 42 kHz when no magnetic field applied. Its nonlinearity within /spl plusmn/120 mT is smaller than 0.56%. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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