التفاصيل البيبلوغرافية
| العنوان: |
A Modulation Method for Tunnel Magnetoresistance Current Sensors Noise Suppression. |
| المؤلفون: |
Wang, Shuaipeng, Huang, Haichao, Yang, Ying, Chen, Yanning, Fu, Zhen, Jin, Zhenhu, Shi, Zhenyu, Xiong, Xingyin, Zou, Xudong, Chen, Jiamin |
| المصدر: |
Micromachines; Mar2024, Vol. 15 Issue 3, p360, 12p |
| مصطلحات موضوعية: |
TUNNEL magnetoresistance, NOISE, DETECTORS, TEST methods, MAGNETIC fields |
| مستخلص: |
To mitigate the impact of low-frequency noise from the tunnel magnetoresistance (TMR) current sensor and ambient stray magnetic fields on weak current detection accuracy, we propose a high-resolution modulation-demodulation test method. This method modulates and demodulates the measurement signal, shifting low-frequency noise to the high-frequency band for effective filtering, thereby isolating the target signal from the noise. In this study, we developed a Simulink model for the TMR current sensor modulation-demodulation test method. Practical time-domain and frequency-domain tests of the developed high-resolution modulation-demodulation method revealed that the TMR current sensor exhibits a nonlinearity as low as 0.045%, an enhanced signal-to-noise ratio (SNR) of 77 dB, and a heightened resolution of 100 nA. The findings indicate that this modulation-demodulation test method effectively reduces the impact of low-frequency noise on TMR current sensors and can be extended to other types of resistive devices. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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