Current sensor, current measuring module, and smart meter

A current measuring module, comprising:

• an electronic substrate module;
• a current sensor fixed on the electronic substrate module;
• and
• a wiring line whose relative position to the electronic substrate module is fixed,
• a current to be measured flowing in the wiring line,
• the current sensor further comprising:
• a plurality of magnetoresistance elements whose resistance value changes by application of an current-induced magnetic field from a current to be measured;
• and
• a first magnetic body that applies a first offset magnetic field substantially parallel to the current-induced magnetic field applied to a first magnetoresistance element of the plurality of magnetoresistance elements.

A smart meter in which the current measuring module is installed,

• the current measuring module comprising:
• an electronic substrate module;
• a current sensor fixed on the electronic substrate module;
• and
• a wiring line whose relative position to the electronic substrate module is fixed,
• a current to be measured flowing in the wiring line,
• the current sensor further comprising:
• a plurality of magnetoresistance elements whose resistance value changes by application of an current-induced magnetic field from a current to be measured;
• and
• a first magnetic body that applies a first offset magnetic field substantially parallel to the current-induced magnetic field applied to a first magnetoresistance element of the plurality of magnetoresistance elements.