The invention relates to a sensor device (200) having a sensor (210), having a circuit carrier, having conductor sections (230, 231, 233, 234) which serve for supplying electrical current to the sensor (210) and for detecting an output signal (U.sub.H) generated by the sensor (210) and by means of which the sensor (210) is connected to the circuit carrier, and having a supply and read-out device, wherein respective contact points (235, 236) of two of the conductor sections (230, 231) on the circuit carrier (220) are electrically connected by means of a capacitor (C.sub.1) such that the two conductor sections (230, 231), the capacitor (C.sub.1) and the sensor (210) form constituent parts of an electrical loop (L.sub.1), and to a current converter and to the use of such a sensor device (200).

A system for imaging, including a source of coherent light; a polarization state generator for generating polarized optical photons from the light originating in the source of coherent light; a sample environment; a polarization state analyzer for permitting photons having a desired polarization to interact with a detector; and an imaging unit for generating an image based on the interactions of the photons with the detector. The sample environment includes a plurality of electromagnets, each connected to one or more power supply components; and a controller, connected to the electromagnets and including software for generating and controlling a desired magnetic field created by each of the electromagnets in concert with each other.

A magnetic sensor comprises a magnetoresistive effect element including a first side surface and a second side surface facing in opposite directions along a first axis and a first end surface and a second end surface facing in opposite directions along a second axis substantially orthogonal to the first axis. The sensor has a sensitivity axis extending in a direction of the first axis, a first yoke unit provided adjacent to the first side surface of the magnetoresistive effect element, and a first bias magnetic field generation unit provided adjacent to the first end surface of the magnetoresistive effect element. The first bias magnetic field generation unit is provided to be capable of applying a bias magnetic field on the magnetoresistive effect element and the first yoke unit.

An example of a sensor for determining a direction of a magnetic field comprises at least one magnetoresistive sensor element for determining the direction of the magnetic field, and at least one further sensor element of another type which is suitable for determining the direction of the magnetic field.

A calibration method for calibrating a magnetizable core, wherein the magnetizable core is coupled to a magnetic transducer; the method comprising applying a pulse of magnetomotive force to the core such that a distinct value of remanence is produced in the core, wherein the value of remanence in the core depends on a strength of the pulse.

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 magnetic field detection apparatus includes a magnetoresistive effect element and a helical coil. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction. The helical coil includes a parallel connection including first and second parts extending in a second axis direction inclined with respect to the first axis direction. The first and second parts are adjacent to each other in a third axis direction and coupled to each other in parallel. The helical coil is wound around the magnetoresistive effect element while extending along the third axis direction. The magnetoresistive effect film overlaps the first and second parts in a fourth axis direction orthogonal to the second and third axis directions. The helical coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in the third axis direction.

A magnetic sensor device comprises a substrate. A first magnetic sensor, a second magnetic sensor, and one or more inductors are disposed over the substrate and are controlled by a magnetic sensor controller having a control circuit. The control circuit is adapted for controlling the first magnetic sensor to measure magnetic fields under presence of a first set of magnetic fields, and for controlling the second magnetic sensor to measure magnetic fields under presence of a second set of magnetic fields generated by the inductors. The control circuit calculates a relative sensitivity matching value that converts magnetic field values measured by the second magnetic sensor to a comparable magnetic field value measured by the first magnetic sensor or vice versa. The control circuit is further adapted for correcting a measurement by the second magnetic sensor using the relative sensitivity matching value to produce a corrected measurement, and for calculating a magnetic field gradient by combining a measurement by the first magnetic sensor with the corrected measurement.

The present invention describes an electromagnetically positioning system, which can measure a position and orientation of a remote object in an isolated targeted examination area with time. Specifically, the remote object is a remote miniaturized examination device. During the location process, both the electromagnetically positioning system and the remote miniaturized examination device can have expected or unexpected, controlled and can-not-be-controlled movement. By implementing the electromagnetically positioning system, disclosed herein, position and orientation information of the remote miniaturized examination device can be linked with time, any information collected by the remote miniaturized examination device, for example, the photo images collected, can be associated kinetically with time and positioning information of the examination device, when the remote miniaturized examination device travels inside an isolated target examination area.

To increase, in a magnetic sensor having a magnetoresistive strip and a ferromagnetic film, a magnetic bias to be applied to a magnetoresistive element by magnetically coupling the magnetoresistive strip and ferromagnetic film. A magnetic sensor 1 includes a magnetoresistive strip S, an insulating film 13 that covers the magnetoresistive strip S, and ferromagnetic films M1 and M2 formed on the insulating film 13 and arranged in the x-direction through a magnetic gap G extending in the y-direction. The ferromagnetic films M1 and M2 overlap a plurality of hard magnetic members H through the insulating film 13. This allows two adjacent hard magnetic members H to be magnetically coupled through the ferromagnetic films M1 and M2. This makes it possible to increase the magnetic bias to be applied to a magnetoresistive element R without involving an increase in the size of the hard magnetic member H.