Patent · US Active

Calibration of hall device sensitivity using an auxiliary hall device

US10698066B2 · kind B2 · utility

3Cited by
4References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 13, 2018
Grant dateJun 30, 2020
Priority date—
Expiry dateDec 21, 2038

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R33/07
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.