Current sensor
AssigneeAnalog Devices International Unlimited Company
InventorsBrent William Hoffman, Jonathan Ephraim David Hurwitz
Life of this patent
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Abstract
A rate of change of current sensor includes two measurement coils, arranged such that the turns of the first and second measurement coils are interleaved. The rate of change of current sensor further comprises two return coils, arranged to progress in an opposite direction to the measurement coils. The coils form loops and progress substantially around a target measurement conductor. This ensures that the two measurement coils both receive the same electrostatic coupling from external conductors which are not the target of the measurement operation. Further, the two measurement coils are arranged such that the first coil and the second coil are, on average, the same distance to the current-carrying conductor of interest.
Claims13
A current sensor comprising:
- a substrate comprising a first layer and a second layer;
- a first measurement coil;
- a second measurement coil;
- a first connection element formed on the first layer of the substrate and the second layer of the substrate, the first connection element comprising a first end and a second end and extending alternately between the first layer and the second layer;
- and
- a second connection element formed on the first layer of the substrate and the second layer of the substrate, the second connection element comprising a first end and a second end and extending alternately between the first layer and the second layer,
- wherein the first end of the first connection element is coupled to the first measurement coil and the first end of the second connection element is coupled to the second measurement coil,
- wherein the second end of the first connection element and the second end of the second connection element are configured to couple to a current measurement circuit,
- wherein the first connection element and the second connection element are arranged on the substrate to cross over each other.
Dependencies are inferred from the claim text.