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. 20, 1982
Filed:
Apr. 14, 1980
Mark L Shaw, Mesa, AZ (US);
Ronald J Freimark, Scottsdale, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An amplifier circuit is disclosed for temperature compensating the output voltage thereof with respect to undesirable temperature induced signals from a silicon pressure transducer and/or from components of the amplifier itself. The amplifier includes a first operational amplifier and a second operational amplifier. A first circuit connects the output terminal of the first operational amplifier through a summing node to one input terminal of the second amplifier. Output signals from the pressure transducer are applied between one input terminal of the first operational amplifier and another input terminal of the second amplifier. A temperature compensating circuit is connected to the summing node for enabling the output voltage of the amplifier to be substantially independent of temperature. An initial offset voltage compensating circuit is coupled to the summing node for adjusting the intercept of the pressure-to-output voltage transfer curve. The gain of the second operational amplifier determines the slope of the curve.