Current sensing circuit, printed circuit board component and current sensor device
A printed circuit board, current sensing technology, applied in the direction of measuring current/voltage, measuring device, measuring device casing, etc., can solve the problem of inability to accurately measure transient current, reduce current measurement accuracy, weak output voltage signal, etc., to eliminate Effect of temperature drift, cancellation effect, accurate output voltage
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[0042] Several different preferred embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals in different drawings represent like parts. As mentioned above, the essence of the present invention lies in a current sensing circuit with a negative feedback circuit, which can eliminate the temperature drift of the circuit under changing environment, so as to obtain an accurate voltage output.
[0043] figure 2It is a structural block diagram of an embodiment of the current sensing circuit of the present invention. As shown in the figure, the current sensing circuit 200 includes a Wheatstone bridge circuit 210 and a negative feedback circuit 220 connected to the Wheatstone bridge circuit 210 . Specifically, the Wheatstone bridge circuit 210 is composed of four magnetoresistive elements, such as giant magnetoresistive (GMR) elements. Under the concept of the present invention, the magnetoresistive elemen...
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