Magnetic sensor using a plurality of Hall effect devices

Details Magnetic sensor using a plurality of Hall effect devices Magnetic sensor using a plurality of Hall effect devices

1986-02-13

1988-04-19

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

307309, G01R 3306, H01L 4306, H03K 1790

Patent

active

047392649

ABSTRACT:
Two Hall effect devices are series-connected to form a magnetic sensor. Each of the Hall effect devices has a pair of Hall terminals for developing a Hall voltage when exposed to an external magnetic field. A comparator compares the potentials of two selected Hall terminals of the different Hall devices with each other to produce a compared signal. A switching element is connected to one of the Hall devices to control the potential of the Hall terminals to equalize the potentials of the two selected Hall terminals in response to the compared signal. Two non-selected Hall terminals develop positive and negative Hall voltages, respectively, relative to the selected Hall terminals so that the magnetic sensor produces a totalized Hall voltage of the two Hall effect devices.

REFERENCES:
patent: 3419798 (1968-12-01), Walton
patent: 4349814 (1982-09-01), Akehurst
patent: 4464629 (1984-08-01), Tanaka et al.
patent: 4465976 (1984-08-01), Avery et al.

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