The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1982
Filed:
Apr. 16, 1980
John W Jerrim, Lilburn, GA (US);
Sangamo Weston, Inc., Norcross, GA (US);
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 experimentally 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 temperature compensated Hall voltage. In a second embodiment, the ROM is addressed by only the temperature dependent voltage to generate a correction voltage that is added to the Hall element voltage for temperature compensation.