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:
Jun. 16, 1998
Filed:
Dec. 19, 1996
Applicant:
Inventors:
Assignee:
National Instruments Corporation, Austin, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01K / ;
U.S. Cl.
CPC ...
374179 ;
Abstract
A method and apparatus for reducing the effects of ground loops in a thermocouple measurement device employing a differential amplifier for signal amplification. A resistor is coupled at the input of the differential amplifier to provide a DC ground reference. A capacitor is coupled in parallel to the resistor to compensate for AC noise and prevent the inputs from floating out of common mode range.