Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1995-12-28
1997-06-17
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Magnetometers
73862473, G01R 3307, G01L 104
Patent
active
056400900
ABSTRACT:
A sensor IC generates a voltage according to magnetic flux density of an applied magnetic field. The sensor IC includes a plurality of Hall sensors having an identical shape formed adjacent to each other in a semiconductor chip, each of the Hall sensors generating a sensor output voltage which includes a Hall output voltage component in proportion to the magnetic flux density. The sensor IC further includes a plurality of differential amplifiers having an identical circuit formed adjacent to each other in the semiconductor chip, each of the differential amplifiers multiplying the sensor output voltage produced from a corresponding one of the Hall sensors by a given gain. In the sensor IC, by a summing circuit, output signals produced from the plurality of differential amplifiers are summed.
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Furuya Misao
Urushiyama Hirohiko
Watanabe Atsushi
Yano Katsuaki
Meller Michael N.
Mitsumi Electric Company Ltd.
O'Shea Sandra L.
Phillips Roger C.
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