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Current-sense MOSFETs

Current-sense MOSFETs
Measuring a current without affecting the circuit in which that current is flowing is an ideal test method. Current-sense power MOSFETs are available nowadays that, with the aid of additional internal connections and output pins, enable that ideal to be approached. In these devices, a separate circuit is created in which a small current flows that is directly proportional to the much larger current flowing through the FET proper.
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