Circuit configuration for a gradometric current sensor with...

Details Circuit configuration for a gradometric current sensor with... Circuit configuration for a gradometric current sensor with...

2006-04-18

2006-04-18

Nguyen, Vinh P. (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

C324S126000

Reexamination Certificate

active

07030601

ABSTRACT:
In order to create a circuit configuration for a gradiometric current sensor with a bridge circuit in the form of a Wheatstone bridge for measuring gradients of the magnetic field strength of a current-carrying conductor, with four magnetoresistive resistors, two of which resistors form a sub-bridge in each case, while the sub-bridges are arranged symmetrically in relation to sub-conductors of the current-carrying conductor, and with a compensating circuit associated with the bridge circuit, which compensating circuit comprises compensating conductors associated with the magnetoresistive resistors, to which compensating conductors a compensating current can be applied, by means of which circuit configuration mounting tolerances can be compensated in a simple manner, it is provided that the sub-bridges (22, 24) can each have a separate compensating current (Icomp1, Icomp2) applied to them.

REFERENCES:
patent: 4441072 (1984-04-01), Rahman
patent: 4596950 (1986-06-01), Lienhard et al.
patent: 5621377 (1997-04-01), Dettmann et al.
patent: 5933003 (1999-08-01), Hebing et al.
patent: 6433545 (2002-08-01), Kunze et al.
patent: 0607595 (1994-07-01), None

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