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. 10, 2012
Filed:
Nov. 19, 2009
Akihiko Furukawa, Tokyo, JP;
Tsuyoshi Kawakami, Tokyo, JP;
Yasuhiro Kagawa, Tokyo, JP;
Satoshi Yamakawa, Tokyo, JP;
Akihiko Furukawa, Tokyo, JP;
Tsuyoshi Kawakami, Tokyo, JP;
Yasuhiro Kagawa, Tokyo, JP;
Satoshi Yamakawa, Tokyo, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A power amplifier amplifying and compositing differential signals and capable of suppressing harmonics is provided. The power amplifier includes first amplifiers amplifying a first input signal and a second input signal, which are differential signals, a first coil receiving the first input signal and the second input signal amplified by the first amplifiers, a second coil magnetically coupled with the first coil and outputting a composite signal of the amplified first input signal and second input signal, a third coil magnetically coupled with the second coil, and a first capacitor coupled between both ends of the third coil, wherein one end of the first capacitor is coupled to a ground node.