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:
Jun. 18, 2019
Filed:
May. 30, 2014
Applicant:
Snaptrack Inc., San Diego, CA (US);
Inventors:
Juha Ellä, Halikko, FI;
Edgar Schmidhammer, Stein an der Traun, DE;
Assignee:
SnapTrack, Inc., San Diego, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/20 (2006.01); H03H 7/38 (2006.01); H03H 9/02 (2006.01); H03H 9/46 (2006.01); H03H 9/54 (2006.01); H03H 9/56 (2006.01); H03H 9/60 (2006.01); H03H 9/64 (2006.01); H03H 9/70 (2006.01);
U.S. Cl.
CPC ...
H03H 9/46 (2013.01); H03F 3/20 (2013.01); H03H 7/38 (2013.01); H03H 9/542 (2013.01); H03H 9/568 (2013.01); H03H 9/605 (2013.01); H03H 9/64 (2013.01); H03H 9/6483 (2013.01); H03F 2200/294 (2013.01); H03H 9/70 (2013.01); H03H 2009/02165 (2013.01); H03H 2009/02204 (2013.01); H03H 2210/025 (2013.01);
Abstract
The invention specifies a tunable RF filter which may operate using electroacoustic components and provides good electrical properties despite having a wide tuning range. For this purpose, the RF filter comprises a tunable filter core (AFK) having electroacoustic (EAK) and detunable (AKE) filter elements, and impedance restoration circuits (IWS, IWS) for compensating for an impedance change by tuning the filter core.