Abstract: A current sensing method and a current sensor are provided. The current sensing method includes the steps of: exciting a magnetic core to generate at least one pair of regions having opposite magnetization directions in the magnetic core; providing a current to pass through a sensing region of the magnetic core, so that the magnetic core correspondingly generates a magnetic field change; and sensing the magnetic field change of the magnetic core by a pickup coil wound around the magnetic core to output an output signal corresponding to the current.

Abstract: A magnetic field sensing apparatus including a magnetic flux concentrator and a plurality of single direction magneto-resistive sensors is provided. The magnetic flux concentrator has a first and a second end portions opposite to each other. The single direction magneto-resistive sensors have the same pinning direction and are disposed beside the magnetic flux concentrator. The single direction magneto-resistive sensors further include a plurality of first and second single direction magneto-resistive sensors. The first single direction magneto-resistive sensors are disposed beside the first end portion and further include a first and a third portions respectively being disposed two opposite sides of the first end portion. The first and a third portions are coupled to a first full Wheatstone bridge.

Abstract: A magnetic field sensing device including a plurality of first magnetoresistor units and a plurality of second magnetoresistor units is provided. Magnetic field sensing axes of the first magnetoresistor units are parallel to a plane formed by a first direction and a third direction and are inclined with respect to the first direction and the third direction. Magnetic field sensing axes of the second magnetoresistor units are parallel to a plane formed by a second direction and the third direction and are inclined with respect to the second direction and the third direction. The first magnetoresistor units and the second magnetoresistor units are configured to measure a plurality of magnetic field components in a plurality of directions in three-dimensional space in a plurality of different time periods, respectively.

Abstract: A magnetic field sensing device including a substrate, a plurality of magnetic flux concentrators and a plurality of magneto-resistive sensors and a plurality of magnetic setting structures is provided. The magnetic flux concentrators, the magneto-resistive sensors and the magnetic setting structures are disposed on the substrate. At least a portion of the magneto resistive sensors is disposed at two opposite sides of each of the magnetic flux concentrators. The orthogonal projection regions of each of the magnetic flux concentrators, at least a portion of the magneto-resistive sensors, and each of the magnetic setting structures on the substrate are respectively a first orthogonal projection region, a second orthogonal projection region, and a third orthogonal projection region. The third orthogonal projection region at least overlaps the first orthogonal projection region and at least a portion of the second orthogonal projection region. Furthermore, a magnetic field sensing apparatus is also provided.

Abstract: A magnetic field sensing apparatus including a magnetic flux concentrator and a plurality of single direction magneto-resistive sensors is provided. The magnetic flux concentrator has a first and a second end portions opposite to each other. The single direction magneto-resistive sensors have the same pinning direction and are disposed beside the magnetic flux concentrator. The single direction magneto-resistive sensors further include a plurality of first and second single direction magneto-resistive sensors. The first single direction magneto-resistive sensors are disposed beside the first end portion and further include a first and a third portions respectively being disposed two opposite sides of the first end portion. The first and a third portions are coupled to a first full Wheatstone bridge.

Abstract: A magnetic field sensing apparatus including a magnetic flux concentrator, a plurality of magnetoresistance units, and a plurality of magnetization direction setting elements is provided. The magnetic flux concentrator has a top surface, a bottom surface opposite to the top surface, and a plurality of side surfaces connecting the top surface and the bottom surface. The magnetoresistance units are respectively disposed beside the side surfaces. The magnetoresistance units are electrically connected to form an unchangeable Wheatstone full bridge. The magnetization direction setting elements set the magnetization directions of the magnetoresistance units into three different combinations in three different periods, respectively, so as to enable the unchangeable Wheatstone full bridge to respectively measure the magnetic field components in the three different directions in the three different periods.

Abstract: A magnetic field sensing apparatus and detection method thereof are provided. The magnetic field sensing apparatus includes an anisotropic magneto-resistive (AMR) magnetic field detector, a reference magnetic field detector, and a controller. The AMR magnetic field detector generates a first output voltage according to a detected magnetic field. The reference magnetic field detector generates a second output voltage according to the detected magnetic field. The controller identifies whether an absolute value of a field density of the detected magnetic field is larger or smaller than a predetermined value or not, and selects the first output voltage or a saturation voltage to be a magnetic field detection result accordingly.

Abstract: A current sensing method and a current sensor are provided. The current sensing method includes the steps of: exciting a magnetic core to generate at least one pair of regions having opposite magnetization directions in the magnetic core; providing a current to pass through a sensing region of the magnetic core, so that the magnetic core correspondingly generates a magnetic field change; and sensing the magnetic field change of the magnetic core by a pickup coil wound around the magnetic core to output an output signal corresponding to the current.

Abstract: A magnetic field sensing apparatus and a sensing method are provided. The magnetic field sensing apparatus includes an anisotropic magnetoresistive (AMR) resistor, a current generator, and an arithmetic device. The AMR resistor is configured to provide a first resistance value according to a sensed magnetic field in a first magnetic field sensing phase and provide a second resistance value according to the sensed magnetic field in a second magnetic field sensing phase by a magnetized direction setting operation. The current generator provides a current based on a current direction to flow through two ends of the AMR resistor. The arithmetic device is configured to perform an arithmetic operation with respect to a first voltage difference and a second voltage difference generated according to the current respectively in the first magnetic field sensing phase and the second magnetic field sensing phase, and generate a magnetic field sensing voltage result accordingly.

Abstract: A magnetic field sensing device including a plurality of first magnetoresistor units and a plurality of second magnetoresistor units is provided. Magnetic field sensing axes of the first magnetoresistor units are parallel to a plane formed by a first direction and a third direction and are inclined with respect to the first direction and the third direction. Magnetic field sensing axes of the second magnetoresistor units are parallel to a plane formed by a second direction and the third direction and are inclined with respect to the second direction and the third direction. The first magnetoresistor units and the second magnetoresistor units are configured to measure a plurality of magnetic field components in a plurality of directions in three-dimensional space in a plurality of different time periods, respectively.

Abstract: A magnetic field sensing apparatus including a plurality of first magnetoresistance units, a plurality of second magnetoresistance units, and a magnetic field sensing device is provided. Magnetic field sensing axes of the first and second magnetoresistance units are parallel to a first direction and a second direction respectively, and the first and second magnetoresistance units are disposed beside the magnetic field sensing device, which is configured to measure a magnetic field component in a third direction. The first and second magnetoresistance units are electrically connected to form at least one kind of Wheatstone full bridge in two different time periods to respectively measure magnetic field components in fourth and fifth directions and to cause this kind of Wheatstone full bridge to output two signals respectively corresponding to the magnetic field components in the fourth and fifth directions. The first direction to the fifth direction are different from each other.

Abstract: A magnetic field sensing apparatus including a magnetic flux concentrator, a plurality of magnetoresistance units, and a plurality of magnetization direction setting elements is provided. The magnetic flux concentrator has a top surface, a bottom surface opposite to the top surface, and a plurality of side surfaces connecting the top surface and the bottom surface. The magnetoresistance units are respectively disposed beside the side surfaces. The magnetoresistance units are electrically connected to form an unchangeable Wheatstone full bridge. The magnetization direction setting elements set the magnetization directions of the magnetoresistance units into three different combinations in three different periods, respectively, so as to enable the unchangeable Wheatstone full bridge to respectively measure the magnetic field components in the three different directions in the three different periods.

Abstract: A magnetic field sensing device including a substrate, a plurality of magnetic flux concentrators and a plurality of magneto-resistive sensors and a plurality of magnetic setting structures is provided. The magnetic flux concentrators, the magneto-resistive sensors and the magnetic setting structures are disposed on the substrate. At least a portion of the magneto resistive sensors is disposed at two opposite sides of each of the magnetic flux concentrators. The orthogonal projection regions of each of the magnetic flux concentrators, at least a portion of the magneto-resistive sensors, and each of the magnetic setting structures on the substrate are respectively a first orthogonal projection region, a second orthogonal projection region, and a third orthogonal projection region. The third orthogonal projection region at least overlaps the first orthogonal projection region and at least a portion of the second orthogonal projection region. Furthermore, a magnetic field sensing apparatus is also provided.

Abstract: A magnetic field sensing apparatus including a magnetic flux concentrator and a plurality of magnetoresistance units is provided. The magnetic flux concentrator has a top surface, a bottom surface opposite to the top surface, and a plurality of side surfaces connecting the top surface and the bottom surface. The magnetoresistance units are respectively disposed beside the side surfaces. The magnetoresistance units are electrically connected to form at least one kind of Wheatstone full bridge in three different periods, so as to measure magnetic field components in three different directions, respectively, and to cause the at least one kind of Wheatstone full bridge to output three signals corresponding to the magnetic field components in the three different directions, respectively.

Abstract: A magnetic field sensing apparatus and a detection method thereof are provided. The magnetic field sensing apparatus includes first and second AMR resistors, a current generator, and an arithmetic device. A magnetized direction of the first AMR resistor is set as a first direction. A magnetized direction of the second AMR resistor is set as a second direction opposite to or the same as the first direction. The current generator provides a current in a direction parallel to the first direction to flow through the first and second AMR resistors. The arithmetic device obtains a first detection voltage according to a voltage difference between two terminals of the first AMR resistor, obtains a second detection voltage according to a voltage difference between two terminals of the second AMR resistor, and performs his an arithmetic operation on the first and second detection voltages to obtain a first magnetic field detection result.

Abstract: A magnetic field sensing apparatus and a sensing method are provided. The magnetic field sensing apparatus includes an anisotropic magnetoresistive (AMR) resistor, a current generator, and an arithmetic device. The AMR resistor is configured to provide a first resistance value according to a sensed magnetic field in a first magnetic field sensing phase and provide a second resistance value according to the sensed magnetic field in a second magnetic field sensing phase by a magnetized direction setting operation. The current generator provides a current based on a current direction to flow through two ends of the AMR resistor. The arithmetic device is configured to perform an arithmetic operation with respect to a first voltage difference and a second voltage difference generated according to the current respectively in the first magnetic field sensing phase and the second magnetic field sensing phase, and generate a magnetic field sensing voltage result accordingly.

Abstract: A measurement method is configured to measure an external magnetic field. The measurement method includes: modifying a magnetic field distribution of the external magnetic field, so as to convert at least a portion of each of components of the external magnetic field in a first direction, a second direction, and a third direction at a plurality of different positions to the second direction, and sensing a magnitude of a magnetic field in the second direction at the different positions, so as to measure component magnitudes of the external magnetic field in the first, second and third directions.

Abstract: A magnetic field sensing apparatus including a substrate, first, second, and third magnetic field sensing units, and a switching circuit is provided. The substrate has a surface, and has a first inclined surface and a second inclined surface. The first magnetic field sensing unit includes a plurality of magnetoresistance sensors connected together to form a Wheatstone full bridge and disposed on the surface. The second magnetic field sensing unit includes a plurality of magnetoresistance sensors connected together to form a Wheatstone half bridge and disposed on the first inclined surface. The third magnetic field sensing unit includes a plurality of magnetoresistance sensors connected together to form a Wheatstone half bridge and disposed on the second inclined surface. The switching circuit electrically connects the second magnetic field sensing unit and the third magnetic field sensing unit. A magnetic field sensing module is also provided.

Abstract: A magnetic field sensing apparatus including a plurality of first magnetoresistance units, a plurality of second magnetoresistance units, and a magnetic field sensing device is provided. Magnetic field sensing axes of the first and second magnetoresistance units are parallel to a first direction and a second direction respectively, and the first and second magnetoresistance units are disposed beside the magnetic field sensing device, which is configured to measure a magnetic field component in a third direction. The first and second magnetoresistance units are electrically connected to form at least one kind of Wheatstone full bridge in two different time periods to respectively measure magnetic field components in fourth and fifth directions and to cause this kind of Wheatstone full bridge to output two signals respectively corresponding to the magnetic field components in the fourth and fifth directions. The first direction to the fifth direction are different from each other.

Abstract: A magnetic field sensing apparatus and detection method thereof are provided. The magnetic field sensing apparatus includes an anisotropic magneto-resistive (AMR) magnetic field detector, a reference magnetic field detector, and a controller. The AMR magnetic field detector generates a first output voltage according to a detected magnetic field. The reference magnetic field detector generates a second output voltage according to the detected magnetic field. The controller identifies whether an absolute value of a field density of the detected magnetic field is larger or smaller than a predetermined value or not, and selects the first output voltage or a saturation voltage to be a magnetic field detection result accordingly.