Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.

Provided is a current sensor capable of being assembled even if a bus bar inserted through a magnetic core has a complex shape that is difficult to insert through an opening portion of a case. A case includes a first case segment and a second case segment provided with opening portions having a cut-out shape that is open toward a direction orthogonal to a direction in which a detection target portion of a bus bar extends, and the case is assembled to the detection target portion by inserting the detection target portion into the opening portions from the direction orthogonal to the direction in which the detection target portion extends.

When a through hole is formed in a primary conductor, a measurement target current partially becomes a bypass current that flows around the through hole. Only a magnetic field component in the X-axis direction is generated from the current that flows through a portion without the influence of the through hole. However, the bypass current generates a magnetic field component in the Y-axis direction at the tilt portion. A magnetic detection element having a magnetic field detection sensitivity only in the Y-axis direction is installed near the through hole such that the magnetic field detection direction is set in the Y-axis direction, thereby detecting the magnetic field component and measuring the current amount without the influence of a neighboring current.

Systems and methods provide a non-contact current measurement system which operates to measure alternating current flowing through an insulated wire without requiring galvanic contact with the insulated wire. The measurement system may include a magnetic field sensor that is selectively positionable proximate an insulated wire under test. In operation the magnetic field sensor detects a magnetic field generated by the current flowing in the insulated wire. Using an adjustable clamp assembly, the measurement system provides control over the mechanical positioning of the insulated wire relative to the magnetic field sensor to ensure consistent measurements. The non-contact current measurement system may determine information relating to the physical dimensions (e.g., diameter) of the insulated wire. Using the detected magnetic field, the known mechanical positioning, and the determined information relating to the physical dimensions of the insulated wire, the measurement system accurately determines the magnitude of the current flowing through the insulated wire without galvanic contact.

A magnetic sensor drive circuit that measures a magnetic field by passing a feedback current, which cancels changes in magnetic flux density using measured magnetic field, through a prescribed coil. The drive circuit includes: a first circuit block which controls the feedback current by using an external power source as a power source; a second circuit block which has an output adjustment circuit adjusting a signal according to the strength of the feedback current to be a signal proportional to the voltage of the power source; a first power source line which supplies the external power source to the first circuit block; a second power source line which supplies the external power source to the second circuit block in parallel to the first power source line; a first low pass filter; and a second low pass filter.

The invention relates to an electrical device comprising a support comprising a holding member, and an electrical circuit (12) housed at least partially in the support and comprising an array of electrical tracks (122) and a receiving portion (121) designed to receive a magnetic field sensor. The electrical circuit (12) is configured so as to create an electrical link between the magnetic field sensor, on the one hand, and an electronic board external to the electrical device, on the other hand. The holding member comprises at least one bearing portion forming a stop so as to create a mechanical link between the support and the electronic board. Said receiving portion (121) forms an exposed surface configured so as to create an electrical connection with said magnetic field sensor through plane-to-plane contact between the receiving portion (121) and a face of the magnetic field sensor.

The disclosure relates to a printed circuit board arrangement with a printed circuit board with at least two current conducting layers. The current conducting layers extend in an axial direction of the printed circuit board and are arranged in succession in a thickness direction of the printed circuit board. The printed circuit board arrangement has a busbar which is arranged on a lateral surface of the printed circuit board and is in contact with at least one part of the current conducting layers of the printed circuit board.

Switching of particular inputs in a signal processing channel permits an independent evaluation of that signal processing channel, in a system where there are at least two signal processing channels, one of which is able to be calibrated while the other of which is measuring current in a shunt. Switching a controlled current through a shunt, the controlled current being small in value compared with an overall current being measured, permits yet another independent evaluation of the shunt.

Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.

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.