Temperature compensation system for hall effect element

Details Temperature compensation system for hall effect element Temperature compensation system for hall effect element

G - Physics

01

R

324/48, 324/60

G01R 33/06 (2006.01) G01R 21/08 (2006.01) G01R 33/07 (2006.01)

Patent

CA 1160295

TEMPERATURE COMPENSATION SYSTEM FOR HALL EFFECT ELEMENT ABSTRACT: In a solid state current, power or energy meter having a Hall element magnetically coupled to line current, a system for compensating the Hall voltage for its dependence on temperature comprises a read only memory (ROM) containing experi- mentally obtained temperature compensation data. The temperature of the Hall element is measured by a thermistor to develop a temperature dependent voltage. In one embodiment, the Hall element voltage and temperature dependent voltage are digitalized and supplied to address the ROM to generate a tempera- ture compensated Hall voltage. In a second embodi- ment, the ROM is addressed by only the temperature dependent voltage to generate a correction voltage that is added to the Hall element voltage for tempera- ture compensation.

375521

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