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:
Aug. 13, 2024
Filed:
Mar. 14, 2022
Applicant:
Allegro Microsystems, Llc, Manchester, NH (US);
Inventors:
Paul A. David, Bow, NH (US);
William P. Taylor, Amherst, NH (US);
Assignee:
Allegro MicroSystems, LLC, Manchester, NH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 33/09 (2006.01); G01D 5/20 (2006.01); G01R 33/00 (2006.01); G01R 33/07 (2006.01);
U.S. Cl.
CPC ...
G01R 33/093 (2013.01); G01D 5/2013 (2013.01); G01R 33/07 (2013.01); G01R 33/09 (2013.01); G01R 33/00 (2013.01);
Abstract
Methods and apparatus for detecting a magnetic field include a semiconductor substrate, a coil configured to provide a changing magnetic field in response to a changing current in the coil; and a magnetic field sensing element supported by the substrate. The coil receives the changing current and, in response, generates a changing magnetic field. The magnetic field sensing element detects the presence of a magnetic target by detecting changes to the magnetic field caused by the target and comparing them to an expected value.