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AssigneeHoneywell Inc.
InventorsDavid A. Sandquist, James E. Lenz, Dale F. Berndt
Estimating the term…
A magnetoresistive sensor system having resistive elements changing in ohmic value in the presence of a magnetic field of a current being measured. The variant values of the elements are amplified by some electronics that inherently add offset to the resultant values. The elements themselves also add an offset. The output of the electronics is modulated and then buffered as an output. This output is demodulated integrated. The resultant signal is fed back to the input of the electronics to null out the offsets. The output of the buffer also goes to an inductive coil that is magnetically coupled to the resistive elements to null out the magnetic field from the current being measured. The buffer output indicates the magnitude of the current being measured. An oscillator outputs a signal to actuate the modulator and the demodulator. The oscillator signal also goes to a set/reset circuit for setting and resetting the resistive elements of the magnetoresistive sensor.
A magnetoresistive current sensor system comprising:
A magnetoresistive sensor system comprising:
A magnetoresistive current sensor system comprising:
A means for sensing current with offset nulling, comprising:
A current sensor system for sensing an input current, the input current generating an input magnetic field, the current sensor system comprising:
A magnetoresistive current sensor system for noncontact sensing of an impact current, the input current producing an input magnetic field, said system comprising:
A method for sensing an input current, the input current providing an input magnetic field, the method comprising:
Dependencies are inferred from the claim text.