Invention Grant
- Patent Title: Calibration of hall device sensitivity using an auxiliary hall device
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Application No.: US15952521Application Date: 2018-04-13
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Publication No.: US10698066B2Publication Date: 2020-06-30
- Inventor: Arup Polley , Srinath Ramaswamy , Baher S. Haroun
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Michael A. Davis, Jr.; Charles A. Brill; Frank D. Cimino
- Main IPC: G01R35/00
- IPC: G01R35/00 ; G01R33/07

Abstract:
In described examples, a Hall effect sensor includes a primary Hall effect sensor element and an auxiliary Hall effect sensor element. A known magnetic field is applied to the auxiliary Hall effect sensor to produce an auxiliary Hall voltage used in a feedback loop to control the bias current of the auxiliary Hall effect sensor to maintain the auxiliary Hall voltage approximately constant over a range of temperature and other factors. A bias current for the primary Hall effect sensor is controlled to track the bias current of the auxiliary Hall effect sensor to maintain the sensitivity of the primary Hall effect sensor approximately constant over the same range of temperature and other factors.
Public/Granted literature
- US20190317175A1 Calibration of Hall Device Sensitivity Using an Auxiliary Hall Device Public/Granted day:2019-10-17
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