Concept for detecting a change of a physical quantity by...

Details Concept for detecting a change of a physical quantity by... Concept for detecting a change of a physical quantity by...

2007-09-14

2010-10-12

Thompson, Jewel (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

Reexamination Certificate

active

07810398

ABSTRACT:
An apparatus for detecting a change of a physical quantity by means of a conductor structure having a processor for applying a defined supply signal to the conductor structure so as to effect a current flow through the conductor structure, the current flow being changeable by the physical quantity, and a detector for detecting a magnetic field caused by the current flow through the conductor structure by means of a magnetoresistive element allocated to the conductor structure, a change of the physical quantity being associated with a change of the detected magnetic field.

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Vieth, M., et al., “Contactless current detection with GMR sensors based on an artificial antiferromagnet (AAF) subsystem,” Sensors and Actuators, 2000, pp. 44-48, vol. 81, Elsevier Science S.A.

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