Current sensor

Details Current sensor Current sensor

2005-10-19

2009-02-24

Lee, Kyung (Department: 2832)

Electrical resistors

Resistance value responsive to a condition

Magnetic field or compass

C324S252000, C324S207210

Reexamination Certificate

active

07495541

ABSTRACT:
The present invention provides a current sensor capable of sensing a current to be detected with high precision. The current sensor includes a bus line which extends in an X direction at a first level and to which a current to be detected is supplied, a first magnetoresistive element extending in the X direction in a region corresponding to the bus line at a second level, and a second magnetoresistive element extending in the X direction in a region corresponding to the bus line at a third level. The resistance value of the first magnetoresistive element and that of the second magnetoresistive element change in directions opposite to the second level in accordance with a current magnetic field generated by the current to be detected. With the configuration, the first and second magnetoresistive elements and the bus line can be disposed close to each other. While realizing compactness, the current magnetic field can be detected with high sensitivity.

REFERENCES:
patent: 5422571 (1995-06-01), Gurney et al.
patent: 5432373 (1995-07-01), Johnson
patent: 5621377 (1997-04-01), Dettmann et al.
patent: 6667682 (2003-12-01), Wan et al.
patent: U-5-4038 (1993-01-01), None
patent: A-5-126865 (1993-05-01), None
patent: A-6-222082 (1994-08-01), None
patent: A-10-506193 (1998-06-01), None

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