Magnetic field sensor and method of fabricating a magnetic field sensor having a plurality of vertical hall elements arranged in at least a portion of a polygonal shape

a magnetic field sensor and polygonal shape technology, applied in galvano-magnetic devices, instruments, solid-state devices, etc., can solve the problems of angular resolution, substantial amount of time required to generate all of the output signals of the cvh sensing element, and inability to determine the direction of the magnetic field in a substantial amount of tim

Active Publication Date: 2014-06-26
ALLEGRO MICROSYSTEMS INC
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also conventionally, output signals from the vertical Hall elements of a CVH sensing element are generated sequentially, resulting in a substantial amount of time necessary to generate all of the output signals from the CVH sensing element.
Thus, determination of the direction of the magnetic field can take a substantial amount of time.
Furthermore, the magnetic field sensor may provide an angular resolution that is too low (too large an angle step size).

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic field sensor and method of fabricating a magnetic field sensor having a plurality of vertical hall elements arranged in at least a portion of a polygonal shape
  • Magnetic field sensor and method of fabricating a magnetic field sensor having a plurality of vertical hall elements arranged in at least a portion of a polygonal shape
  • Magnetic field sensor and method of fabricating a magnetic field sensor having a plurality of vertical hall elements arranged in at least a portion of a polygonal shape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033]Before describing the present invention, some introductory concepts and terminology are explained. As used herein, the term “magnetic field sensing element” is used to describe a variety of electronic elements that can sense a magnetic field. The magnetic field sensing elements can be, but are not limited to, Hall Effect elements, magnetoresistance elements, or magnetotransistors. As is known, there are different types of Hall Effect elements, for example, a planar Hall element, a vertical Hall element, and a circular Hall element. As is also known, there are different types of magnetoresistance elements, for example, a giant magnetoresistance (GMR) element, an anisotropic magnetoresistance element (AMR), a tunneling magnetoresistance (TMR) element, an Indium antimonide (InSb) sensor, and a magnetic tunnel junction (MTJ).

[0034]As used herein, the term “sensor” is used to describe a circuit or assembly that includes a sensing element and other components. In particular, as used...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A magnetic field sensor has a plurality of vertical Hall elements arranged in at least a portion of a polygonal shape. The magnetic field sensor includes an electronic circuit to process signals generated by the plurality of vertical Hall elements to identify a direction of a magnetic field. A corresponding method of fabricating the magnetic field sensor is also described.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]Not Applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH[0002]Not Applicable.FIELD OF THE INVENTION[0003]This invention relates generally to magnetic field sensors and related fabrication techniques, and, more particularly, to a magnetic field sensor and corresponding fabrication technique having a plurality of vertical Hall elements arranged in at least a portion of a polygonal pattern and also having an electronic circuit coupled to the plurality of vertical Hall elements.BACKGROUND OF THE INVENTION[0004]Planar Hall elements and vertical Hall elements are known types of magnetic field sensing elements that can be used in magnetic field sensors. A planar Hall element tends to be responsive to magnetic field perpendicular to a surface of a substrate on which the planar Hall element is formed. A vertical Hall element tends to be responsive to magnetic field parallel to a surface of a substrate on which the vertical Hall element is f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(United States)
IPC IPC(8): G01B7/30H01L29/82
CPCG01R33/0023H01L29/82G01R33/077H01L43/065
Inventor FOLETTO, ANDREAFRIEDRICH, ANDREAS P.YOAKIM, NICOLAS
Owner ALLEGRO MICROSYSTEMS INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap