Hall effect field sensor circuit with temperature compensation u

Details Hall effect field sensor circuit with temperature compensation u Hall effect field sensor circuit with temperature compensation u

1983-09-22

1987-02-24

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Magnetometers

324224, 324225, 307309, 338 32H, G01R 3306, G01N 2772, H03K 1790, H03K 1918

Patent

active

046460144

ABSTRACT:
A Hall effect magnetic field sensing circuit provides an operation amplif which is connected to a signal voltage terminal of the Hall effect sensor with a negative temperature coefficient (TK) of the resistance of the drive current path whose drive current path is provided with an input resistor such that a portion of the Hall effect sensor responds to the change in temperature thereof to vary the drive current and provide temperature compensation of the Hall voltage. A differential amplifier can be provided to eliminate the zero residual voltage effect and a summing circuit connected to the operational amplifier rectifies nonlinearity.

REFERENCES:
patent: 4134030 (1979-01-01), Pace
patent: 4435653 (1984-03-01), Matul et al.

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