US 2023/0400537 A1 · MAGNETIC FIELD CURRENT SENSOR TO REDUCE STRAY MAGNETIC FIELDS

Abstract

In one aspect, a magnetic field current sensor includes an annihilation detector. The annihilation detector includes an annihilation bridge that includes magnetoresistance elements. The annihilation detector also includes a current bridge that includes at least two of the magnetoresistance elements, a first comparator configured to compare an output signal from the annihilation bridge and a second comparator configured to compare an output signal from the current bridge. An output of the annihilation detector indicates whether an annihilation exists in one or more of the magnetoresistance elements using at least one of the outputs signals of the first and second comparators.

Claims35

Dependent claims

A magnetic field current sensor comprising:

an annihilation detector comprising:
an annihilation bridge comprising magnetoresistance elements;
a current bridge comprising at least two of the magnetoresistance elements;
a first comparator configured to compare an output signal from the annihilation bridge;
and
a second comparator configured to compare an output signal from the current bridge,
wherein an output of the annihilation detector indicates whether an annihilation exists in one or more of the magnetoresistance elements using at least one of the outputs signals of the first and second comparators.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/806,336Filed 10 Jun 2022

Published

14 Dec 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G01R 33/098
Magnetoresistive devices: comprising tunnel junctions, e.g. tunnel magnetoresistance sensors
G01R 15/205
Using galvano-magnetic devices, e.g. Hall-effect devices , i.e. measuring a magnetic field via the interaction between a current and a magnetic…:…
G01R 15/207
Using galvano-magnetic devices, e.g. Hall-effect devices , i.e. measuring a magnetic field via the interaction between a current and a magnetic…:…
G01R 33/0023
Arrangements or instruments for measuring magnetic variables: electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the…

Magnetic field current sensor to reduce stray magnetic fields

Life of this patent

Magnetic field current sensor to reduce stray magnetic fields

Life of this patent

Abstract

Claims35