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:
Sep. 15, 1992
Filed:
Oct. 25, 1990
John W Raynes, Sandy, UT (US);
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Abstract
An apparatus and method for compensating for temperature dependent offset and fixed offset in a resistance bridge is disclosed. The apparatus comprises a resistance bridge, a compensation network and an instrumentation amplifier. The uncompensated output of the bridge is applied to the input of the instrumentation amplifier. The output of the compensation network is fed into the instrumentation amplifier to compensate for the temperature and offset dependent components of the bridge output. The output and resistance of the bridge are measured under conditions of constant pressure and temperature for different temperatures and pressures and the temperature coefficient of resistance, temperature coefficient of offset and temperature coefficient of sensitivity are calculated. These coefficients are used to select compensation network resistors.