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:
Mar. 19, 1991
Filed:
Sep. 22, 1989
Applicant:
Inventor:
Jurgen Kordts, Norderstedt, DE;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ; G01L / ;
U.S. Cl.
CPC ...
73708 ; 73718 ; 73724 ;
Abstract
A circuit arrangement for temperature compensation of capacitive pressure sensors and differential pressure sensors includes two measuring capacitors (1,2) which are arranged in respective feedback branches of two measuring integrators (3, 4). The capacitance values vary as a function of the pressure or differential pressure to be detected and are converted into measurement signals by the measuring interconnect. A negative feedback circuit is provided which comprises a Schmitt trigger circuit (5) which at least generates a temperature-dependent activation signal for the measuring integrators from a measurement signal.