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. 03, 2009
Filed:
Jun. 14, 2005
Applicant:
Walter Cerutti, Arnad, IT;
Inventor:
Walter Cerutti, Arnad, IT;
Assignee:
Telecom Italia S.p.A., Milan, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 27/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pair of identical humidity sensors (S) and (S) are in the same environment, so that they identically react to humidity effects; a sensing circuit includes an operational amplifier (), its input () receiving from the first sensor (Si) a signal changing with humidity according to a logarithmic law, while the second sensor (S), inserted in the amplifier feedback, reacts to humidity changes in the same way as the first sensor (Si) and consistently modifies the gain. The output signal (V) is compensated, and has a substantially linear progression with humidity.