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:
Dec. 30, 2003
Filed:
Jun. 27, 2001
Lassi Hyvönen, Helsinki, FI;
Esko Järvinen, Espoo, FI;
Nokia Mobile Phones Ltd., Espoo, FI;
Abstract
The invention relates to a matching circuit for adapting an amplifier to load impedance at various output power levels of the amplifier, and a method for adapting the amplifier to load impedance at various output power levels of the amplifier. The matching circuit comprises an LC circuit, i.e. an electric circuit switching consisting of at least one coil and at least one capacitor for tuning harmonic signals resulting from amplifier non-linearities. At least one capacitor of the LC circuit ( ) is an adjustable microelectromechanical (MEMS) capacitor ( ). The LC circuit comprises an interface for receiving control signals ( ) adjusting capacitance of the microelectromechanical (MEMS) capacitor. The control signals ( ) adjust the capacitance of the microelectromechanical (MEMS) capacitor ( ) such that the LC circuit ( ) resonates at the frequency of the harmonic signal to be tuned.