The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2018
Filed:
Jun. 08, 2016
Applicant:
Allegro Microsystems, Llc, Worcester, MA (US);
Inventors:
Paul A. David, Bow, NH (US);
Ravi Vig, Bow, NH (US);
Assignee:
Allegro MicroSystems, LLC, Manchester, NH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/14 (2006.01); G01D 5/16 (2006.01); G01P 3/488 (2006.01); G01B 7/02 (2006.01);
U.S. Cl.
CPC ...
G01D 5/142 (2013.01); G01B 7/023 (2013.01); G01D 5/147 (2013.01); G01D 5/16 (2013.01); G01P 3/488 (2013.01);
Abstract
A back-biased magnetic field sensor uses one or more magnetic field sensing elements upon a substrate, each outside of a substrate region in which magnetic field lines are near perpendicular to the substrate and outside of which magnetic field lines are not to the substrate. The back-biased magnetic field sensor can sense an approaching and/or a retreating ferromagnetic object.