The rotation angle detection device includes: a magnet; a magnetic detection element disposed on the one side in the axial direction relative to the magnet with a gap interposed between the magnetic detection element and the magnet; and a shield. The shield is disposed at a location in the axial direction between a location in the axial direction of a wire member allowing current to flow therethrough and a location in the axial direction of the magnetic detection element, is disposed radially outward of the magnet as seen in the axial direction, and has a portion that overlaps with the wire member as seen in the axial direction. The wire member is disposed at a location in the axial direction that is closer to the magnet than the magnetic detection element is, and is disposed radially outward of the magnet as seen in the axial direction.

An object of the present invention is to reduce leakage magnetic flux in a magnetic sensor provided with a sensor substrate and an external magnetic member. A magnetic sensor includes: a sensor substrate having an element forming surface on which magnetic sensing elements are formed, first and second side surfaces, and a back surface; a first external magnetic member provided between the first and second magnetic sensing elements; and a second external magnetic member having first and second parts and covering the first side surface and second side surface, respectively. The first and second parts of the second external magnetic member protrude from the element forming surface. According to the present invention, since the first and second parts of the second external magnetic member protrude from the element forming surface, leakage of magnetic flux between the first and second external magnetic members is reduced.

The present invention relates to an in-wheel motor driving apparatus for reducing weight, improving Hall sensor assembly performance, and reducing a defect rate. According to one embodiment of the present invention, the weight of an in-wheel motor can be reduced by separating a suspension housing and a shaft and applying different materials thereto. Furthermore, the ease of assembling a Hall sensor can be improved, and the defect rate can be reduced.

The present invention relates to an in-wheel motor driving apparatus for reducing weight, improving Hall sensor assembly performance, and reducing a defect rate. According to one embodiment of the present invention, the weight of an in-wheel motor can be reduced by separating a suspension housing and a shaft and applying different materials thereto. Furthermore, the ease of assembling a Hall sensor can be improved, and the defect rate can be reduced.

One example discloses a sensor calibration circuit, including: a controller configured to transmit a first modulation signal to the sensor and receive a first output signal from the sensor in response; wherein the controller configured to transmit a second modulation signal to the sensor and receive a second output signal from the sensor in response; and wherein the controller is configured to calibrate the sensor based on the first and second modulation signals and the first and second output signals.

One example discloses a sensor calibration circuit, including: a controller configured to transmit a first modulation signal to the sensor and receive a first output signal from the sensor in response; wherein the controller configured to transmit a second modulation signal to the sensor and receive a second output signal from the sensor in response; and wherein the controller is configured to calibrate the sensor based on the first and second modulation signals and the first and second output signals.

According to an embodiment, a magnetic field sensor includes: one or more magnetic field sensing elements; and a magnet structure to provide a bias magnetic field about the one or more magnetic field sensing elements, the magnet structure includes alternating magnetic layers and non-magnetic layers with at least three magnetic layers.

According to an embodiment, a magnetic field sensor includes: one or more magnetic field sensing elements; and a magnet structure to provide a bias magnetic field about the one or more magnetic field sensing elements, the magnet structure includes alternating magnetic layers and non-magnetic layers with at least three magnetic layers.

A combined dual-conductive key switch including a base, a cover arranged above the base, a conductive core, a mechanical-conducting component and an inductive switch which are electrically connected to a PCB respectively; and a conduction trigger block corresponding to the mechanical-conducting component and a magnet corresponding to the inductive switch are respectively arranged on the conductive core; and the conduction trigger block triggers a conduction stroke of conducting the mechanical-conducting component, which is different from a conduction stroke of conducting the inductive switch triggered by the magnet. The combined dual-conductive key switch is provided for achieving dual-conductive functions of pressing once and performing two actions for a product.

A combined dual-conductive key switch including a base, a cover arranged above the base, a conductive core, a mechanical-conducting component and an inductive switch which are electrically connected to a PCB respectively; and a conduction trigger block corresponding to the mechanical-conducting component and a magnet corresponding to the inductive switch are respectively arranged on the conductive core; and the conduction trigger block triggers a conduction stroke of conducting the mechanical-conducting component, which is different from a conduction stroke of conducting the inductive switch triggered by the magnet. The combined dual-conductive key switch is provided for achieving dual-conductive functions of pressing once and performing two actions for a product.