Transistor devices are provided. In some example implementations, a magnetic field sensor chip is fitted on a load electrode of a transistor chip. In other example implementations, two magnetic field sensors are arranged on a load electrode of a transistor chip in such a way that they measure different effective magnetic fields in the event of current flow through the transistor chip.

In some implementations, a sensing device associated with less than a 360 degree measurement range may obtain a set of signal values. The sensing device may be configured to sense a magnetic field present at the sensing device and collect sensor data based on the magnetic field. The set of signal values may be included in the sensor data collected by the sensing device and may correspond to one or more components of the magnetic field present at the sensing device. The sensing device may determine, based on the set of signal values, a set of calibration points and a set of angular positions. The sensing device may calculate a set of calibration parameters based on the set of calibration points and the set of angular positions. The sensing device may utilize the set of calibration parameters to perform one or more safety checks.

A multi-sensor, real-time, in-process current and voltage estimation system is disclosed including sensors, affiliated hardware, and data processing algorithms that allow accurate estimation of currents and voltages from magnetic and electric field measurements, respectively. Aspects of the system may be embodied in a detector that is readily attachable to conductors of an energized system for contactless current and/or voltage sensing of the conductors without requiring the conductors to be disconnected from the energized system.

A method of sensing a current in a conductor includes controlling a digital to analog converter output to cancel residual offset voltage in a magnetic tunnel junction device prior to sensing the current with the magnetic tunnel junction device. The method includes switching input to the magnetic tunnel junction device between a fixed voltage and an output of a digital to analog converter while switching input to a band pass filter between a lower and an upper voltage output of the magnetic tunnel junction device. The output of the digital to analog converter is modified to provide a low-amplitude unsaturated sine-wave at an output of the band pass filter, at which point changes in the output of the band pass filter are associated with the amount of current in a sensed conductor.

Methods and apparatus for providing a high isolation current sensor. In embodiments, a current sensor includes a leadframe having a current conductor first portion and a second portion, a magnetic field sensing element positioned in relation to the current conductor for detecting a magnetic generated by current flow through the current conductor, and a die supported by at least a portion of the first and/or second portions of the leadframe, wherein the first portion of the lead frame includes an isolation region aligned with a first edge of the die. In embodiments, a current sensor includes SOI processing and features to enhance active layer isolation.

Methods and apparatus for providing a high isolation current sensor. In embodiments, a current sensor includes a leadframe having a current conductor first portion and a second portion, a magnetic field sensing element positioned in relation to the current conductor for detecting a magnetic generated by current flow through the current conductor, and a die supported by at least a portion of the first and/or second portions of the leadframe, wherein the first portion of the lead frame includes an isolation region aligned with a first edge of the die. In embodiments, a current sensor includes SOI processing and features to enhance active layer isolation.

This device for measuring a magnetic field comprises: a magnetic field sensor, comprising: a probe, and a pick-up coil and a feedback coil coiled around the probe, and a control circuit, comprising: a generation module comprising a probe signal generation unit, configured to generate an electrical current, a preamplification module, a buffer module, configured to deliver an output signal of the control circuit-(44) defining an output magnetic field value, a piloting moduleconfigured to pilot the probe signal generation unit to generate the electrical current in the probe.The control circuit comprises a correction module configured to control a working magnetic field, corresponding to a magnetic field maximizing the magnetic field sensitivity of the probe and minimizing the magnetic field noise of the probe.

A magnetic sensor 1 includes: a non-magnetic substrate 10; and a sensitive element 30 disposed on the substrate 10. The sensitive element 30 has a longitudinal direction and a transverse direction and has a uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction. The sensitive element 30 is configured to sense a magnetic field by a magnetic impedance effect. The sensitive element 30 includes a soft magnetic material layer 101 made of an amorphous alloy based on Co and having a saturation magnetization of greater than or equal to 300 emu/cc and less than or equal to 650 emu/cc.

Apparatus (100) and method for testing cell contact of battery cells (102) of a battery module (104), which battery cells are electrically connected in parallel via a contacting system (106, 107). The apparatus includes a sensor positioning system (108) for positioning a sensor device (110) at a plurality of test points (112) of the battery module, which is movable along a longitudinal axis (X), a transverse axis (Y), and a vertical axis (Z), and a current generation circuit (114) for generating a battery cell current (I), which is a discharging current from the battery cell or a charging current into the battery cell. The sensor device includes at least one field sensor (118), which, after the sensor device is positioned at one of the test points, detects a field in the region of the test point, which is generated by the battery cell current generated with the current generation circuit.

The magnetic field detector includes an x-axis magnetic sensor, a y-axis magnetic sensor, and a z-axis magnetic sensor for detecting magnetic field components in three orthogonal axis directions. Each of the magnetic sensors includes a magnetic impedance element having an impedance that varies in accordance with an ambient magnetic field and an output circuit configured to output a magnetic field detection value that varies in accordance with the impedance of the magnetic impedance element. The magnetic field detector includes an oscillator configured to supply a common drive signal to the magnetic impedance element of each of the magnetic sensors, wherein each of the magnetic sensors outputs, in response to the drive signal, the magnetic field detection value from the output circuit.