公开(公告)号：US11686597B2

公开(公告)日：2023-06-27

申请号：US16434649

申请日：2019-06-07

Applicant: Allegro MicroSystems, LLC

Inventor： Dominik Weiland ,  Marcus Hagn ,  Dominik Geisler

IPC: G01D5/14 ,  G01P3/487 ,  G01P13/04 ,  G01R33/028

CPC classification number: G01D5/14 ,  G01D5/145 ,  G01P3/487 ,  G01P13/045 ,  G01R33/028

Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and/or a direction of movement of a ferromagnetic object. The sensor includes at least one magnetic field sensing element configured to generate a magnetic field signal in response to a magnetic field associated with an object. The sensor includes a detector configured to generate a detector signal having edges occurring in response to a comparison of the magnetic field signal and the threshold signal. The sensor includes an output circuit configured to generate an output signal having a first format when a characteristic of the magnetic field signal is within a first range and having a second format different than the first format when the characteristic of the magnetic field signal is within a second range, different than the first range.

公开(公告)号：US20170219662A1

公开(公告)日：2017-08-03

申请号：US15010453

申请日：2016-01-29

Applicant: Allegro Microsystems, LLC

Inventor： Seth Prentice ,  Andrea Foletto ,  Marcus Hagn

IPC: G01R33/07

CPC classification number: G01R33/07 ,  G08B25/045 ,  H03K5/08 ,  H03K7/08

Abstract: The present disclosure is directed to methods and systems for providing information about a target based on pulse widths. The information can be provided in a formatted output signal which uses a pulse width protocol to code information by varying amplitudes and widths of successive pulses in an output signal pulse train portion. The method includes detecting a first feature of the target and in response to detecting the first feature, generating an output signal pulse train portion comprising two or more pulses with at least two of the pulses having different amplitudes and each of the two or more pulses having a width corresponding to a logic value. The widths of the two or more pulses in the output signal pulse train portion can be measured in response to the detected first feature reaching a first amplitude threshold, whereby the widths can correspond to different logic values.