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:
Oct. 14, 2008
Filed:
Aug. 22, 2006
Mikael Hjelm, Vaestras, SE;
Mikael Hjelm, Vaestras, SE;
Infineon Technologies AG, Munich, DE;
Abstract
A circuit for filtering a radio frequency signal at a given frequency comprises an input terminal, a filter device, and an active AC shunt circuit having first and second input terminals and an output terminal, where the first input terminal of the active AC shunt circuit is connected to the input terminal. The filter device is connected between the input terminal and the second input terminal of the active AC shunt circuit, and is provided for attenuating the radio frequency signal at the given frequency to the second input terminal of the active AC shunt circuit. The active AC shunt circuit is provided for shunting a signal at a frequency other than the given frequency as contained in the radio frequency signal to ground, and for outputting the radio frequency signal as filtered at its output terminal.