Invention Grant
- Patent Title: Electronic circuit for driving a hall effect element with a current compensated for substrate stress
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Application No.: US14681575Application Date: 2015-04-08
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Publication No.: US09638764B2Publication Date: 2017-05-02
- Inventor: Juan Manuel Cesaretti , Aaron Cook
- 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:
An electronic circuit can be disposed upon a semiconductor substrate. An epitaxial layer can be disposed over the semiconductor substrate. The electronic circuit can include a Hall effect element, at least a portion of the Hall effect element disposed in the epitaxial layer. The electronic circuit can further include a current generator configured to generate a drive current that passes through the Hall effect element. The current generator can include a resistor disposed in the epitaxial layer and having characteristics such that a resistance of the resistor can vary with a stress of the semiconductor substrate, resulting in changes of the drive current, to compensate for variations in the sensitivity of the Hall effect element with the stress of the substrate.
Public/Granted literature
- US20160299199A1 Electronic Circuit For Driving A Hall Effect Element With A Current Compensated For Substrate Stress Public/Granted day:2016-10-13
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