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Apparatus and methods using multiple magnetic field sensitive devices

A magnetic field and sensitive technology, applied in the direction of measuring device, magnetic field offset compensation, magnetic sensor array, etc., can solve difficult problems

Active Publication Date: 2020-03-17
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, each device operates at a lower supply voltage, and this results in better residual offset
For a device with four terminals, this is straightforward, however, for a device with three terminals, it is not

Method used

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  • Apparatus and methods using multiple magnetic field sensitive devices
  • Apparatus and methods using multiple magnetic field sensitive devices
  • Apparatus and methods using multiple magnetic field sensitive devices

Examples

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Embodiment Construction

[0030] In the following, examples of the present disclosure will be described in detail using the drawings. It should be noted that the same elements or elements with the same function have the same or similar reference numerals, and repeated descriptions of elements with the same or similar numerals are generally omitted. Accordingly, descriptions provided for elements with the same or similar reference numbers are interchangeable. In the following description, numerous details are set forth in order to provide a more thorough explanation of examples of the present disclosure. It will be apparent, however, to one skilled in the art that other examples may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form rather than in detail in order to avoid obscuring the examples described herein. In addition, the features of different examples described below may be combined with each other unless specifica...

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Abstract

An apparatus for magnetic field detection includes a plurality of magnetic field sensitive devices including at least a first magnetic field sensitive device, a second magnetic field sensitive device and a third magnetic field sensitive device. The apparatus includes a power supply configured to provide a first supply current through the first magnetic field sensitive device and a second supply current independent of the first supply current through the second magnetic field sensitive device. The first to third magnetic field sensitive devices are coupled such that the first supply current flows through the first magnetic field sensitive device and does not flow through the second magnetic field sensitive device, and the second supply current flows through the second magnetic field sensitive device and does not flow through the second magnetic field sensitive device. A magnetic field sensitive device, and the sum of the first supply current and the second supply current flows through the third magnetic field sensitive device.

Description

technical field [0001] The present disclosure relates to apparatus and methods using multiple magnetic field sensitive devices. Background technique [0002] Magnetic field sensitive devices are used to measure magnetic fields. An example of a magnetic field sensitive device is a Hall effect device. Hall effect devices have an output signal that is proportional to the magnetic field. At zero magnetic field, a magnetic field sensitive device may output a signal other than zero. This signal is called the offset error (=zero field error) of the device. [0003] A Hall effect device includes a Hall effect region, sometimes referred to as the active region, where the Hall effect occurs, and has three or more contacts. Typically, the Hall effect region is formed from a semiconducting material in a semiconductor substrate. The contactor may be formed by a contact tub located in or in contact with the Hall effect region. Contactors can be fabricated by contact diffusion or inj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/07
CPCG01R33/0017G01R33/0094G01R33/09
Inventor U.奥瑟莱希纳
Owner INFINEON TECH AG