A magnetic field sensor uses upper and lower thresholds. The upper and lower thresholds are limited such that they have a minimum separation distance between equivalent voltage levels of the upper and lower thresholds.

A magnetic field sensor includes a lead frame, a semiconductor die having a first surface in which a magnetic field sensing element is disposed and a second surface attached to the lead frame, and a non-conductive mold material enclosing the die and at least a portion of the lead frame. The sensor may include a ferromagnetic mold material secured to a portion of the non-conductive mold material. Features include a multi-sloped taper to an inner surface of a non-contiguous central region of the ferromagnetic mold material, a separately formed element disposed in the non-contiguous central region, one or more slots in the lead frame, a molded ferromagnetic suppression device spaced from the non-conductive mold material and enclosing a portion of a lead, a passive device spaced from the non-conductive mold material and coupled to a plurality of leads, and a ferromagnetic bead coupled to a lead. Also described is a coil secured to the non-conductive mold material and a lead having at least two separated portions with a passive component coupled across the two portions.

One embodiment provides a method, including: detecting, using a sensor of an information handling device, a change in a magnetic field associated with the information handling device; determining, using a processor, whether the change in the magnetic field corresponds to a known command; and performing, responsive to determining that the change in the magnetic field corresponds to the known command, a function dictated by the known command. Other aspects are described and claimed.

An actuator assembly with a sensor system that is less sensitive to run-out out of moving parts. The sensing system includes a magnet holding plate, a pressure plate, a sensor target and a sensor assembly. The magnet holding plate includes an aperture defining an inner surface, an outer surface, a raised portion along the inner surface, a biasing member positioned along the inner surface in the raised portion, and a flange positioned on the outer surface. The pressure plate includes an outer surface of the pressure plate is positioned underneath the raised portion of the magnet holding plate, axially between the raised portion and the biasing member. The sensor target is attached to the flange of the magnet holding plate. The sensor assembly includes a sensor and a sensor housing positioned radially outward from the pressure plate and magnet holding plate.

A magnetic field sensor includes a back bias magnet to generate a DC magnetic field. First and second magnetic field sensing elements of the magnetic field sensor are disposed proximate to at least one ferromagnetic surface of a ferromagnetic target object. The first and second magnetic field sensing elements generate first and second electronic signals, respectively, in response to first and second sensed magnetic fields corresponding to the DC magnetic field but influenced by the at least one ferromagnetic surface. The magnetic field sensor generates a difference signal that is a difference of amplitudes of the first and second electronic signals. The difference signal is indicative of a rotation measurement of an absolute relative rotation of the ferromagnetic target object and the magnetic field sensor about a rotation axis.

A rotational speed and/or rotational angle detection unit for detecting a rotational speed and/or a rotational angle of a shaft, in particular a crankshaft, of a working device, in particular a vehicle, that is drivable by muscular power and/or by motor power about a rotational axis of the crankshaft, and designed with a surface structure that is materially and/or magnetically formed on a surface of the crankshaft, and a sensor unit that is designed to detect a magnetic field carried by the shaft and by the surface structure.

A proximity sensor with high accuracy without being subject to an influence due to magnet variations is disclosed. A first yoke is insert-molded in an intermediate position between N and S poles of a magnet, and a projecting portion of the first yoke projects from a wall face of the magnet vertically to a magnetic pole face. A protruding portion of a second yoke opposes the projecting portion to arrange a main body portion in parallel with the wall face of the magnet, and a hall IC having a direction of connecting the projecting portion and the protruding portion as a magnetic responsive direction is arranged in a space between the projecting portion and the protruding portion.

Position sensors, including linear position sensors, that utilize magnetic field(s) are disclosed. Disclosed sensors include flux emitters and sensor assemblys. The sensor assemblys include flux collectors that interact with magnetic fields from flux emitters and with a magnetism sensing device. Flux emitters have arrangements of magnets that when combined with the sensor assembly can provide a constantly increasing or a constantly decreasing signal across a range of relative movement.

A displacement detection unit includes first and second sensors, an object, and a calculation section. The object includes first and second regions disposed periodically in a first direction, and performs displacement relative to the first and second sensors in the first direction. The first and second sensors detect first and second magnetic field changes in accordance with the displacement of the object and output the detected first and second magnetic field change as first and second signals, respectively. The first and second signals have different phases. The calculation section performs a calculation of an amount of the displacement of the object in the first direction multiple times per one period corresponding to a time period in which the object performs the displacement by an amount of displacement equivalent to a total of a continuous pair of the first and second regions, on a basis of the first and second signals.

A magnetic angle detector (10) includes a detected object (20a) including a plurality of concave and convex parts (21a) formed at a predetermined pitch on an outer peripheral surface, and a detection body (30a) disposed to face an outer peripheral surface of the detected object. The detection body is a polyhedron, and at least two magnetic detection units (34a and 34b) matching a different detected object are arranged on one plane of the polyhedron. The at least two magnetic detection units are arranged rotationally symmetrically around an arbitrary axis of the detection body.