Offset compensation for magnetic-field sensor with Hall effect d

Details Offset compensation for magnetic-field sensor with Hall effect d Offset compensation for magnetic-field sensor with Hall effect d

1995-09-05

1997-02-18

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

338 32H, 324225, 327511, G01R 3306, G01R 3307, G01D 514

Patent

active

056044330

ABSTRACT:
The invention relates to a magnetic-field sensor with a Hall effect device, a power supply, and an evaluating facility, which can be supplied with a Hall signal from the Hall-effect device and comprises an input amplifier, a storage element, and a signal superposition unit. To improve the accuracy of the magnetic-field sensor, in a first phase, a balancing signal for balancing the measurement-signal path with respect to an interface can be produced with the evaluating facility, the balancing signal being storable in the storage element, and in a second phase, the balancing signal stored in the storage element can be applied through the signal superposition unit to the interface, where it is superimposed on a Hall signal.

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