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:
Jan. 17, 2017
Filed:
Jul. 10, 2012
Stefan Andersson, Lund, SE;
Fenghao Mu, Hjärup, SE;
Johan Wernehag, Malmö, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A transformer filter arrangement () for passing signals at a fundamental frequency and suppressing signals at one or more interfering frequencies is disclosed. It comprises a transformer () having a first winding () and a second winding (), wherein the first winding () has a first end () and a second end () and the second winding () has a first end () and a second end (). It further comprises one or more capacitors (-). For each capacitor (-) of a first set of at least one capacitor of the one or more capacitors (-), the capacitor (-) is connected between a pair of taps (a1, a2; b1, b2; c1, c2) of the first winding (), wherein each tap (a1, a2, b1, b2, c1, c2) of the pair of taps (a1, a2; b1, b2; c1, c2) is located between the first end () and the second end () of the first winding (), and the capacitor (-), together with an inductive sub segment (-) of the first winding (), which is connected in parallel with the capacitor (-) between the pair of taps (a1, a2; b1, b2; c1, c2), forms a parallel LC circuit which is tuned to resonate at one of said interfering frequencies for suppressing signals at said one of the interfering frequencies. A corresponding integrated circuit, a corresponding radio receiver circuit, a corresponding radio transmitter circuit, and a corresponding radio communication apparatus are also disclosed.