Current-sensing apparatus and method for current sensing
A technology for compensating current and circuits, applied in the field of current detection devices
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[0026]FIG. 1 illustrates in simplified schematic form an assembly 12 with a GMR sensor acting as a current sensor as means for detecting at least one electrical variable, in particular a circuit 10 (measuring circuit ), wherein the GMR sensor (or component 12 ) includes the conductor segment 14 of the compensation circuit 16 . An amplifier 18 is provided for feeding the compensation current to the compensation circuit 16 , which amplifier receives the signal of the component 12 or the GMR sensor it comprises at least one input 20 . The signal at the input 20 of the amplifier 18 corresponds to the total field strength of the magnetic field generated by the current flowing from the measuring circuit 10 and to the field strength generated by the compensation current flowing through the compensation circuit 16 . When the magnetic field of the measuring circuit 10 is canceled (ie compensated) by the accompanying magnetic field of the compensation current, the signal at the input 20...
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