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:
Nov. 04, 2014
Filed:
Nov. 15, 2007
Applicants:
Dominique Lo Hine Tong, Rennes, FR;
François Baron, Thorigne Fouillard, FR;
Raafat Lababidi, Rennes, FR;
Ali Louzir, Rennes, FR;
Inventors:
Dominique Lo Hine Tong, Rennes, FR;
François Baron, Thorigne Fouillard, FR;
Raafat Lababidi, Rennes, FR;
Ali Louzir, Rennes, FR;
Assignee:
Thomas Licensing, Boulogne-Billancourt, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 7/03 (2006.01); H03H 11/04 (2006.01); H03H 7/01 (2006.01); H03H 11/52 (2006.01);
U.S. Cl.
CPC ...
H03H 7/0115 (2013.01); H03H 11/52 (2013.01); H03H 7/1758 (2013.01); H03H 7/03 (2013.01);
Abstract
The invention relates to a selective active low-pass filter and to a method for improving the selectivity of such a filter. The method includes centering, in the center of a network, the resonant element whose frequency is closest to the cutoff frequency of the filter and in inserting in series with this element a negative resistance of higher value than the parasitic resistance of the filter.