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:
May. 13, 2014
Filed:
Nov. 26, 2012
Eric Burdette, Newmarket, NH (US);
James M. Bailey, Concord, NH (US);
Daniel S. Dwyer, Auburn, NH (US);
Jeff Eagen, Manchester, NH (US);
Glenn A. Forrest, Bow, NH (US);
Christine Graham, Bow, NH (US);
Eric Shoemaker, Pembroke, NH (US);
P. Karl Scheller, Bow, NH (US);
Eric Burdette, Newmarket, NH (US);
James M. Bailey, Concord, NH (US);
Daniel S. Dwyer, Auburn, NH (US);
Jeff Eagen, Manchester, NH (US);
Glenn A. Forrest, Bow, NH (US);
Christine Graham, Bow, NH (US);
Eric Shoemaker, Pembroke, NH (US);
P. Karl Scheller, Bow, NH (US);
Allegro Microsystems, LLC, Worcester, MA (US);
Abstract
A circuit to detect a movement of an object includes a magnetic field sensing element for generating a magnetic field signal proportional to a magnetic field associated with the object and a motion detector to generate a motion signal indicative of the movement of the object. The motion detector includes a peak identifying circuit to provide a peak signal and a peak sample selection module that selects a sample associated with one or more prior cycles of a magnetic field signal to generate a selected peak signal. The motion detector further includes a threshold generator to generate a threshold signal as a function of the selected peak signal and a comparator to compare the threshold signal with the magnetic field signal to generate the motion signal. Peak samples from prior magnetic field signal cycles may be averaged for use to establish the threshold signal. A method associated with the circuit is also described.