Abstract: Methods and apparatus for a magnetic field sensor IC package having groups of arrays of TMR elements each having a pinning direction. An on-chip coil is routed under the TMR elements to conduct current for generating a magnetic field to stimulate the TMR elements. The device may be configured to sense changes in an applied magnetic field.

Abstract: A current sensor IC includes a lead frame having a die attach pad and elongated leads extending in a single direction with respect to the die attach pad, a semiconductor die having a first surface attached to the die attach pad and a second, opposing surface supporting magnetic field sensing elements, and a non-conductive mold material. A first portion of the mold material encloses the semiconductor die and the die attach pad, a second portion of the mold material encloses a portion of the elongated leads, and the mold material further includes a wing structure between the first portion and the second portion. In assembly, the first portion of the mold material extends into a cutout through a current conductor and the wing structure abuts a surface of the conductor. The current sensor can implement differential sensing based on signals from at least two magnetic field sensing elements.

Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.

Abstract: 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.

Abstract: Methods and systems for unique session number sharing to ensure traceability are discussed herein. According to an implementation, a user sends a request to login a browser from a user equipment to a server device. The server device validates a user credential associated with the browser by comparing the user credential with pre-stored user registration information. Once the user credential is validated, the server device generates a session with a unique session number (USN) with respect to the request. The server device generates a plurality of logs with respect to the activities occurred during the session and associates the USN with each of the multiple logs. The USN is further included in an access token that authorizes the user to access the websites hosted by the browser.

Abstract: 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.

Abstract: In one aspect, a magnetic-field biosensor includes an insulator and a plurality of magnetic-field sensing elements that includes a first and a second magnetic-field sensing elements. The insulator has a first and a second plurality of portions, and the second plurality of portions is thicker than the first plurality of portions. The magnetic-field biosensor further includes a first receptor configured to attach to biological material and being on a first portion of the first plurality of portions and directly above the first magnetic-field sensing element; and a second receptor configured to attach to the biological material and being on a first portion of the second plurality of portions and directly above the second magnetic-field sensing element. Outputs of the first and the second magnetic-field sensing elements are used to sense a magnetic field from a first magnetic nanoparticle by reducing an effect of an applied magnetic field.

Abstract: A system is provided comprising: a first target including a plurality of first teeth; and a second target that is coupled to the first target via a mechanical link, the second target including a plurality of second teeth, the second target being disposed above or below the first target, the plurality of first teeth including a different number of teeth than the plurality of second teeth, wherein the first target and the second target are configured to generate respective magnetic fields in response to one or more excitation magnetic fields, the respective magnetic fields being usable to measure a twisting force that is incident on the mechanical link that couples the first target to the second target.

Abstract: A system, comprising: a processing circuitry that is configured to: receive a signal S1 and a signal S2, the signal S1 being generated by a first receiving coil in response to a first magnetic field, the signal S2 being generated by a second receiving coil in response to the first magnetic field, receive a signal S3 and a signal S4, the signal S3 being generated by a third receiving coil in response to a second magnetic field, the signal S4 being generated by a fourth receiving coil in response to the second magnetic field; calculate a first electrical angle based on signals S1 and S2; calculate a second electrical angle based on signals S3 and S4; and generate an output signal based on the first and second electrical angles.

Abstract: An apparatus, comprising: a first transmitting coil including at least one first portion and at least one second portion, the first and second portions having different polarities; and a second transmitting coil that is disposed above or below the first transmitting coil, the second transmitting coil including at least one third portion and at least one fourth portion, the third and fourth portions having different polarities, wherein the first and second transmitting coils are configured so that, when the first transmitting coil is not driven and the second transmitting coil is driven, a net magnetic flux through at least one of the first portions is approximately zero, the net magnetic flux being a magnetic flux that is entirely attributable to the second transmitting coil.

Abstract: A magnetic field current sensor comprising: a conductor; magnetic field sensing elements including a first magnetic field sensing element generating a first signal, a second magnetic field sensing element generating a second signal, a third magnetic field sensing element generating a third signal, and a fourth magnetic field sensing element generating a fourth signal; circuitry that generates a difference signal indicative of twice the second signal less the first signal and less the fourth signal, wherein the second magnetic field sensing element is interleaved with the third magnetic field sensing element, wherein the second signal and the third signal are substantially equal, and wherein a distance between the first magnetic field sensing element and the second magnetic field sensing element is equal to a distance between the second magnetic field sensing element and the fourth magnetic field sensing element.

Abstract: Systems, methods, and apparatus for differential magnetic field torque sensors that include first and second magnetic targets for coupling to one or more rotatable shafts. The magnetic targets can include multipole ring magnets having a plurality of alternating magnetic domains. First and second differential magnetic field angular position sensors positioned proximate to the magnetic targets produce angular position of the targets and a processing unit is operative to receive an angular position from each of the first and second differential magnetic field angular position sensors and determine a difference between the angular positions. The difference corresponds to an angle between the targets, and the processing unit is operative to calculate, based on the angle, a torque applied to the one or more rotatable shafts.

Abstract: In one aspect, a magnetic field current sensor includes an annihilation detector. The annihilation detector includes an annihilation bridge that includes magnetoresistance elements. The annihilation detector also includes a current bridge that includes at least two of the magnetoresistance elements, a first comparator configured to compare an output signal from the annihilation bridge and a second comparator configured to compare an output signal from the current bridge. An output of the annihilation detector indicates whether an annihilation exists in one or more of the magnetoresistance elements using at least one of the outputs signals of the first and second comparators.

Abstract: Methods and apparatus for sensors having a main coil to direct a magnetic field at a rotatable target for inducing eddy currents in the target and a receive coil having sine and cosine coils for detecting a reflected field from the target wherein each of the sine and cosine coils is configured such that an asymmetric reflected field from the target seen by the sine and cosine coils corresponds to conductive properties of a surface of the target in relation to the main coil and the receive coil. The sine coil comprises first and second constituent coils offset from each other to compensate for third order harmonic effects and the cosine coil comprises first and second constituent coils to compensate for third order harmonic effects.

Abstract: Differential magnetic field torque sensors include first and second magnetic field concentrators that guide magnetic flux to a magnetic field sensor from first and second magnetic field directors and a target, such as a multipole magnet assembly configured as a ring magnet. The magnetic field concentrators have pairs of sections that are interdigitated and configured adjacent to magnetic field sensing elements of the magnetic field sensor. The magnetic field directors can each have a plurality of teeth, which can be interdigitated and adjacent or proximate to the target. The magnetic field directors can be configured to be mounted as a unit to a rotatable shaft while the target can be configured to be mounted to a different rotatable shaft. The magnetic field concentrators and magnetic field sensor can be fixed while the magnetic field directors and target can rotate with respect to each other about a twist axis.

Abstract: A sensor includes a sensing element configured to generate a sensing element output signal indicative of a sensed parameter and a signal path responsive to the sensing element output signal and having at least one of an adjustable gain or an adjustable offset, wherein the signal path is configured to generate a sensor output signal indicative of the sensed parameter. A supply voltage detector is configured to generate a supply voltage signal indicative of which of a plurality of voltage ranges a supply voltage of the sensor falls within and at least one of the adjustable gain or the adjustable offset is adjustable in response to the supply voltage signal.

Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.

Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.

Abstract: Auto-calibrating current sensor integrated circuits (ICs) are configured for mounting at a position relative to a conductor. The auto-calibrating current sensor ICs can include a plurality of magnetic field sensing elements disposed at different locations within the integrated circuit, respectively, and can be configured to measure a magnetic field produced by a current carried by the conductor. The auto-calibrating sensors can include an electromagnetic model of the IC and the conductor. The model can be operative to determine a magnetic field at points in space due to a given current in the conductor at a known location of the conductor from the IC, and also the inverse situation of determining an unknown current and/or location of the conductor based on measurements of a magnetic field at known locations in space due to an unknown current in the conductor. Related auto-calibration methods are also described.

Abstract: A current sensor IC includes a lead frame having a die attach pad and elongated leads extending in a single direction with respect to the die attach pad, a semiconductor die having a first surface attached to the die attach pad and a second, opposing surface supporting magnetic field sensing elements, and a non-conductive mold material. A first portion of the mold material encloses the semiconductor die and the die attach pad, a second portion of the mold material encloses a portion of the elongated leads, and the mold material further includes a wing structure between the first portion and the second portion. In assembly, the first portion of the mold material extends into a cutout through a current conductor and the wing structure abuts a surface of the conductor. The current sensor can implement differential sensing based on signals from at least two magnetic field sensing elements.