Invention Grant
- Patent Title: Magnetic field sensor with improved accuracy resulting from a variable potentiometer and a gain circuit
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Application No.: US14551905Application Date: 2014-11-24
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Publication No.: US09638766B2Publication Date: 2017-05-02
- Inventor: Aurelian Diaconu
- Applicant: ALLEGRO MICROSYSTEMS, LLC
- Applicant Address: US MA Worcester
- Assignee: Allegro Microsystems, LLC
- Current Assignee: Allegro Microsystems, LLC
- Current Assignee Address: US MA Worcester
- Agency: Daly, Crowley, Mofford & Durkee, LLP
- Main IPC: G01R33/07
- IPC: G01R33/07 ; G01R33/00

Abstract:
A magnetic field sensor includes a plurality of magnetic field sensing elements, wherein the plurality of magnetic field sensing elements is configured to generate a plurality of magnetic field signals, each magnetic field sisal responsive to a magnetic field. The magnetic field sensor additionally includes a sequence switches circuit coupled to the plurality of magnetic field sensing elements. The sequence switches circuit is configured to sequentially select from among the plurality of magnetic field signals to generate a sequenced output signal representative of sequentially selected ones of the plurality of magnetic field signals. The magnetic field sensor also includes a variable potentiometer coupled to the sequence switches circuit. The magnetic field sensor additionally includes a gain circuit coupled to receive a signal representative of the offset attenuated sequenced output signal. A corresponding method is also provided.
Public/Granted literature
- US20160146905A1 MAGNETIC FIELD SENSOR WITH IMPROVED ACCURACY RESULTING FROM A VARIABLE POTENTIOMETER AND A GAIN CIRCUIT Public/Granted day:2016-05-26
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