The invention and use of electric power make the rapid development of modern civilization, but at the same time, the wrong use of electricity will also bring serious disasters. Therefore, how to use electricity correctly is a necessary knowledge for a qualified modern person. The first step is to measure the current, and a good performance current sensor is to ensure that we use the current accurately and reasonably. Therefore, at present, researchers pay great attention to it, and use different technologies to manufacture various current sensors for different precision and environment.<br>
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