A circuit for sensing a current comprises a substrate having a first and a second major surface, the second major surface being opposite to the first major surface. At least one magnetic field sensing element is arranged on the first major surface of the substrate and is suitable for sensing a magnetic field caused by a current flow in a current conductor coupled to the second major surface. The substrate also comprises at least one insulation layer, substantially buried between the first major surface and the second major surface of the substrate.

A current sensor has at least one support element that is configured to carry at least one sensing coil of at least two sensing coils of the current sensor. The support element has at least one face on which at least one sensing coil is arranged. The sensing coil is to be used in connection with a current transferring conductor. The at least two sensing coils differ from each other in respect of at least one of an angular orientation of the individual sensing coil relative to a longitudinal axis of the current transferring conductor and/or a vertical distance of the individual sensing coil relative to the current transferring conductor.

An electric field measuring device measures an electric field corresponding to an inter-electrode voltage between two electrodes, based on a voltage signal that arises at an electric field antenna including the two electrodes because of the electric field. The electric field measuring device includes an amplifier, a reference capacitive element, a GPIO that generates a step wave, and a microcomputer that processes a voltage signal. The microcomputer inputs the step wave to the amplifier, using the GPIO, obtains a step response waveform, and obtains an amplitude compensation factor, based on the step response waveform. The microcomputer compensates the voltage signal, using the amplitude compensation factor.

A system and method for phase and gain calibration of a current sensor system. The system comprises a microcontroller configured to execute software in an energy measurement component and a calibration computer having a calibration application. The energy measurement component receives first and second digital signals representing current and voltage signals, respectively, received from a test source, and calculates active power and a power factor, and provides those values to the calibration computer. The power factor is converted to a converted phase angle. Based on the information received from the energy measurement component, the calibration application calculates parameters used to update components within the microcontroller to maximize the accuracy of the current sensor system.

A circuit for sensing a current comprises a substrate having a first and a second major surface, the second major surface being opposite to the first major surface. At least one magnetic field sensing element is arranged on the first major surface of the substrate and is suitable for sensing a magnetic field caused by a current flow in a current conductor coupled to the second major surface. The substrate also comprises at least one insulation layer, substantially buried between the first major surface and the second major surface of the substrate.

An electric current imaging system, device, and method includes an array of vector magnetometers that senses one or more magnetic fields in three directions produced by a flow of electric current. Such a system (and devices and methods thereof) can further include a display that displays a visual reconstruction of the original electric current that produced the magnetic field(s). The disclosed embodiments image electric current flow (both magnitude and direction) without the need for rastering or relative motion between the sensors and the conductor/device being viewed. Such embodiments can be scaled to fit both large and small applications by using discreet devices or manufacturing a single, miniaturized array with MEMS technologies.

A system and method for phase and gain calibration of a current sensor system. The system comprises a microcontroller configured to execute software in an energy measurement component and a calibration computer having a calibration application. The energy measurement component receives first and second digital signals representing current and voltage signals, respectively, received from a test source, and calculates active power and a power factor, and provides those values to the calibration computer. The power factor is converted to a converted phase angle. Based on the information received from the energy measurement component, the calibration application calculates parameters used to update components within the microcontroller to maximize the accuracy of the current sensor system.

A current detection device includes a plurality of current detection units arranged in the current detection device. Each of the current detection units includes a bus bar that enables a current to be measured to flow therethrough, a magnetic sensor disposed at a position facing the bus bar, and a pair of shields disposed so as to sandwich the bus bar and the magnetic sensor in a facing direction in which the bus bar and the magnetic sensor face each other. The bus bars of the plurality of current detection units extend so as to be aligned to one another and, as viewed in the facing direction, the positions of the shield and the magnetic sensor of each of the current detection units in an extension direction of the bus bars differ from the positions of the shield and the magnetic sensor of the adjacent current detection unit.

A magnetic sensor includes a first insulating layer, a second insulating layer, a third insulating layer, a lower coil element located on an opposite side of the first insulating layer from the second insulating layer, and a second MR element. The second MR element includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer are located on an opposite side of the third insulating layer from the second insulating layer. The first and third insulating layers each contain a first insulating material. The second insulating layer contains a second insulating material.

According to one embodiment, a sensor includes a base including a first face, and a first structure body fixed to the first face. The first structure body includes first and second support portions, a first movable portion, and a first fixed electrode, The first support portion is fixed to the first surface. The second support portion is fixed to the first face and provided around the first support portion. The first movable portion is supported by the first and second support portions and apart from the base. The first fixed electrode is fixed to the first face. The first movable portion includes a first movable electrode and a first conductive member. A first current is configured to flow the first conductive member. The first fixed electrode faces the first movable electrode. A first gap is provided between the first fixed electrode and the first movable portion.