Semiconductor magnetic-to-electric converter with hall device ha

Details Semiconductor magnetic-to-electric converter with hall device ha Semiconductor magnetic-to-electric converter with hall device ha

1995-12-14

1997-08-19

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

324225, 338 32H, 327511, H01L 4306, G01R 3302, G01N 2772

Patent

active

056592493

ABSTRACT:
A semiconductor magnetic to electric converter includes a Hall device, a differential amplifier for differentially amplifying an output voltage of the Hall device, a constant-current circuit forming a constant current source to the differential amplifier and an amplifier for amplifying an output of the differential amplifier. A current to voltage conversion resistor of the constant-current circuit is set to have a temperature characteristic capable of canceling a temperature characteristic of an intrinsic input resistance of the Hall device. Furthermore, the temperature characteristics of a set resistor for setting a current value of the constant current circuit, load resistors included in the differential amplifier and a load resistor of the amplifier are set to cancel out each other.

REFERENCES:
patent: 4833406 (1989-05-01), Foster

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