Method and apparatus for measuring a magnetic field by using a hall-sensor
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Abstract
Method and apparatus for measuring an entity of a magnetic field using a Hall sensor which is provided with at least one Hall plate (101, 102, 103, 104) which has a pair of terminals (A1, A2, B1, B2) for supplying an excitation signal and a pair of terminals (A1, A2, B1, B2) for reading a detection signal, an electric voltage being supplied to the Hall plate as excitation signal from a source (105) of negligible impedance, and an electric current, which represents the measured entity, being tapped off from the Hall plate as detection signal by a pick-up (108, 1098, 110) of negligible impedance.
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30 Claims
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1-15. -15. (canceled)
- 16. Method for measuring an entity of a magnetic field using a Hall sensor, which is provided with at least one Hall plate which includes a group of two pairs ((A1, A2), (B1, B2)) of terminals (A1, A2, B1, B2) located at a distance from one another, an excitation signal being supplied from a source to one pair of terminals, and a detection signal, which forms a representation of the entity, being tapped off from the other pair of terminals by a processing circuit, wherein the source is a voltage source of which an impedance is negligible for use of the sensor, and the processing circuit has a negligible input impedance for tapping off the detection signal as a short-circuit current.
- 27. Apparatus for measuring an entity of a magnetic field using a Hall sensor, which is provided with at least one Hall plate which has a group of two pairs ((A1, A2), (B1, B2)) of terminals (A1, A2, B1, B2) located at a distance from one another, one pair of terminals being connected to a source for supplying an excitation signal to the one pair of terminals, and another pair of terminals being connected to a processing circuit for tapping off and processing a detection signal from the other pair of terminals, wherein the source is a voltage source of which an impedance is negligible for use of the sensor, the processing circuit has a negligible input impedance for tapping off the detection signal as a short-circuit current.
Specification